Python 3.7 Install Fails on Windows 7

[jengelman]

Actual Behavior

After Python 3.7.0 was released and uploaded to the anaconda channel, (as shown by https://anaconda.org/anaconda/python), I tried to update with
conda install -c anaconda python.

Conda then attempted to install python 3.6.6 and a bunch of other packages I already had installed.,
I then tried running conda update python, which told me that all requested packages were already installed.

To confirm that python 3.7.0 was in fact available, I ran conda info python==3.7, and got the following output:

python 3.7.0 hea74fb7_0
-----------------------
file name   : python-3.7.0-hea74fb7_0.tar.bz2
name        : python
version     : 3.7.0
build string: hea74fb7_0
build number: 0
channel     : https://repo.anaconda.com/pkgs/main/win-64
size        : 21.1 MB
arch        : None
constrains  : ()
license     : PSF
md5         : 0d32017fe32d896f49629ff1ca68e399
platform    : None
subdir      : win-64
timestamp   : 1530191353802
url         : https://repo.anaconda.com/pkgs/main/win-64/python-3.7.0-hea74fb7_0.tar.bz2
dependencies:
    vc 14.*
    pip

Directly running conda install python=3.7 gives the following:

UnsatisfiableError: The following specifications were found to be in conflict:
  - python=3.7
Use "conda info <package>" to see the dependencies for each package.

Expected Behavior

Regular update process. I was previously able to upgrade to python 3.6 and 3.6.5 this way.

Steps to Reproduce

Any method to install python 3.7 from conda.

Anaconda or Miniconda version:

Python 3.6.6 :: Anaconda Ccustom (64-bit)
anaconda command client (version 1.6.14)
conda 4.5.4

Operating System:

Windows 7 Professional SP1

conda info

       user config file : C:\Users\jengelman\.condarc
 populated config files : C:\Users\jengelman\.condarc
          conda version : 4.5.4
    conda-build version : not installed
         python version : 3.6.6.final.0
       base environment : C:\Anaconda3  (writable)
           channel URLs : https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/free/win-64
                          https://repo.anaconda.com/pkgs/free/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/pro/win-64
                          https://repo.anaconda.com/pkgs/pro/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
          package cache : C:\Anaconda3\pkgs
                          C:\Users\jengelman\AppData\Local\conda\conda\pkgs
       envs directories : C:\Anaconda3\envs
                          C:\Users\jengelman\AppData\Local\conda\conda\envs
                          C:\Users\jengelman\.conda\envs
               platform : win-64
             user-agent : conda/4.5.4 requests/2.18.4 CPython/3.6.6 Windows/7 Windows/6.1.7601
          administrator : False
             netrc file : None
           offline mode : False

conda list --show-channel-urls

# packages in environment at C:\Anaconda3:
#
# Name                    Version                   Build  Channel
_license                  1.1                      py36_1    defaults
alabaster                 0.7.10           py36hcd07829_0    defaults
alembic                   0.8.10                    <pip>
amqp                      2.2.2                     <pip>
anaconda                  custom           py36h363777c_0    defaults
anaconda-client           1.6.14                   py36_0    defaults
anaconda-navigator        1.8.7                    py36_0    defaults
anaconda-project          0.8.2            py36hfad2e28_0    defaults
anyjson                   0.3.3                     <pip>
appdirs                   1.4.3                     <pip>
arch                      4.3.1               np113py36_0    bashtage
arctic                    1.55.0                    <pip>
argh                      0.26.2                    <pip>
arrow-cpp                 0.8.0               py36_vc14_2  [vc14]  cond
asn1crypto                0.24.0                   py36_0    defaults
astroid                   1.6.5                    py36_0    defaults
atomicwrites              1.1.5                    py36_0    defaults
attrs                     18.1.0                   py36_0    defaults
autodoc                   0.5.0                     <pip>
babel                     2.6.0                    py36_0    defaults
Babel                     2.5.3                     <pip>
backcall                  0.1.0                    py36_0    defaults
backcall                  0.1.0                     <pip>
backports                 1.0              py36h81696a8_1    defaults
backports.shutil_get_terminal_size 1.0.0            py36h79ab834_2    d
bcolz                     0.12.1                    <pip>
bcrypt                    3.1.4                     <pip>
beautifulsoup4            4.6.0            py36hd4cc5e8_1    defaults
billiard                  3.5.0.3                   <pip>
bintrees                  2.0.7                     <pip>
bitarray                  0.8.2            py36hfa6e2cd_0    defaults
black                     18.5b0                    <pip>
bleach                    2.1.3                     <pip>
blosc                     1.5.1                     <pip>
bokeh                     0.12.16                  py36_0    defaults
bottleneck                1.2.1            py36hd119dfa_0    defaults
bzip2                     1.0.6                hfa6e2cd_5    defaults
ca-certificates           2018.03.07                    0    defaults
cached-property           1.3.1                     <pip>
celery                    4.2.0                     <pip>
certifi                   2018.4.16                py36_0    defaults
cffi                      1.11.5           py36h945400d_0    defaults
chardet                   3.0.4                     <pip>
click                     6.7              py36hec8c647_0    defaults
cloudpickle               0.5.3                    py36_0    defaults
clr                       1.0.3                     <pip>
clyent                    1.2.2            py36hb10d595_1    defaults
colorama                  0.3.9            py36h029ae33_0    defaults
colorlover                0.2.1                     <pip>
comtypes                  1.1.4                    py36_0    defaults
conda                     4.5.4                    py36_0    defaults
conda-env                 2.6.0                h36134e3_1    defaults
configparser              3.5.0                     <pip>
console_shortcut          0.1.1                h6bb2dd7_3    defaults
contextlib2               0.5.5            py36he5d52c0_0    defaults
cookies                   2.2.1                     <pip>
croniter                  0.3.20                    <pip>
cryptography              2.2.2            py36hfa6e2cd_0    defaults
cufflinks                 0.12.1                    <pip>
curl                      7.60.0               h7602738_0    defaults
cvxopt                    1.2.0                     <pip>
cycler                    0.10.0           py36h009560c_0    defaults
cyordereddict             1.0.0                     <pip>
cypari                    2.3.0                     <pip>
cython                    0.28.3           py36hfa6e2cd_0    defaults
cytoolz                   0.9.0.1          py36hfa6e2cd_0    defaults
dash-renderer             0.11.3                    <pip>
dask                      0.18.1                   py36_0    defaults
dask-core                 0.18.1                   py36_0    defaults
dask-searchcv             0.2.0            py36h0ec1968_0    defaults
datashape                 0.5.4            py36h5770b85_0    defaults
decorator                 4.3.0                    py36_0    defaults
dill                      0.2.7.1                   <pip>
distributed               1.22.0                   py36_0    defaults
Django                    2.0.3                     <pip>
docker-pycreds            0.2.1                     <pip>
dockerpty                 0.4.1                     <pip>
docopt                    0.6.2                     <pip>
docutils                  0.14             py36h6012d8f_0    defaults
dtw                       1.2                       <pip>
ecdsa                     0.13                      <pip>
entrypoints               0.2.3            py36hfd66bb0_2    defaults
enum34                    1.1.6                     <pip>
et_xmlfile                1.0.1            py36h3d2d736_0    defaults
eventlet                  0.23.0                    <pip>
fastcache                 1.0.2            py36hfa6e2cd_2    defaults
fastparquet               0.1.5                     <pip>
feather-format            0.4.0               py36_vc14_2  [vc14]  cond
filterpy                  1.0.0                     <pip>
flake8                    3.5.0                     <pip>
flask                     1.0.2                    py36_1    defaults
Flask-Admin               1.4.1                     <pip>
Flask-Cache               0.13.1                    <pip>
Flask-Caching             1.3.3                     <pip>
Flask-Compress            1.4.0                     <pip>
flask-cors                3.0.4                    py36_0    defaults
Flask-Login               0.2.11                    <pip>
flask-swagger             0.2.13                    <pip>
freetype                  2.8                  h51f8f2c_1    defaults
funcsigs                  1.0.0                     <pip>
future                    0.15.2                    <pip>
FXrays                    1.3.3                     <pip>
get_terminal_size         1.0.0                h38e98db_0    defaults
gevent                    1.3.4            py36hfa6e2cd_0    defaults
gitdb2                    2.0.3                     <pip>
GitPython                 2.1.8                     <pip>
greenlet                  0.4.13           py36hfa6e2cd_0    defaults
gunicorn                  19.7.1                    <pip>
h5py                      2.7.1                     <pip>
hdf5                      1.10.2               hac2f561_1    defaults
heapdict                  1.0.0                    py36_2    defaults
hide-code                 0.5.0                     <pip>
html5lib                  1.0.1            py36h047fa9f_0    defaults
hyperopt                  0.1                       <pip>
icc_rt                    2017.0.4             h97af966_0    defaults
icu                       58.2                 ha66f8fd_1    defaults
idna                      2.6              py36h148d497_1    defaults
idna                      2.6                       <pip>
imageio                   2.3.0                    py36_0    defaults
imagesize                 1.0.0                    py36_0    defaults
inflection                0.3.1                     <pip>
intel-openmp              2018.0.3                      0    defaults
intel-openmp              2018.0.3                  <pip>
intervaltree              2.1.0                     <pip>
ipykernel                 4.8.2                    py36_0    defaults
ipyparallel               6.0.2                     <pip>
ipython                   6.4.0                    py36_0    defaults
ipython_genutils          0.2.0            py36h3c5d0ee_0    defaults
ipywidgets                7.2.1                    py36_0    defaults
ipywidgets                5.1.5                     <pip>
ipywidgets                7.1.2                     <pip>
iso8601                   0.1.12                    <pip>
isort                     4.3.4                    py36_0    defaults
itsdangerous              0.24             py36hb6c5a24_1    defaults
jdcal                     1.4                      py36_0    defaults
jedi                      0.12.0                   py36_1    defaults
Jinja2                    2.8.1                     <pip>
jinja2                    2.10             py36h292fed1_0    defaults
joblib                    0.11                      <pip>
jpeg                      9b                   hb83a4c4_2    defaults
jsonschema                2.6.0            py36h7636477_0    defaults
jupyter                   1.0.0                    py36_4    defaults
jupyter-contrib-core      0.3.3                     <pip>
jupyter-contrib-nbextensions 0.4.0                     <pip>
jupyter-highlight-selected-word 0.1.0                     <pip>
jupyter-latex-envs        1.4.4                     <pip>
jupyter-nbextensions-configurator 0.4.0                     <pip>
jupyter_client            5.2.3                    py36_0    defaults
jupyter_console           5.2.0            py36h6d89b47_1    defaults
jupyter_core              4.4.0            py36h56e9d50_0    defaults
jupyterlab                0.32.1                   py36_0    defaults
jupyterlab-launcher       0.10.5                    <pip>
jupyterlab_launcher       0.10.5                   py36_0    defaults
kiwisolver                1.0.1            py36h12c3424_0    defaults
kombu                     4.2.1                     <pip>
lazy-object-proxy         1.3.1            py36hd1c21d2_0    defaults
libcurl                   7.60.0               hc4dcbb0_0    defaults
libiconv                  1.15                 h1df5818_7    defaults
libpng                    1.6.34               h79bbb47_0    defaults
libsodium                 1.0.16               h9d3ae62_0    defaults
libssh2                   1.8.0                hd619d38_4    defaults
libtiff                   4.0.9                hb8ad9f9_1    defaults
libxml2                   2.9.8                hadb2253_1    defaults
libxslt                   1.1.32               hf6f1972_0    defaults
lifelines                 0.14.3                    <pip>
line-profiler             2.0                       <pip>
llvmlite                  0.23.1           py36hcacf6c6_0    defaults
locket                    0.2.0            py36hfed976d_1    defaults
Logbook                   1.1.0                     <pip>
lru-dict                  1.1.6                     <pip>
lxml                      4.2.1            py36heafd4d3_0    defaults
lz4                       0.11.1                    <pip>
lzo                       2.10                 h6df0209_2    defaults
m2w64-binutils            2.25.1                        5    defaults
m2w64-bzip2               1.0.6                         6    defaults
m2w64-crt-git             5.0.0.4636.2595836               2    default
m2w64-gcc                 5.3.0                         6    defaults
m2w64-gcc-ada             5.3.0                         6    defaults
m2w64-gcc-fortran         5.3.0                         6    defaults
m2w64-gcc-libgfortran     5.3.0                         6    defaults
m2w64-gcc-libs            5.3.0                         7    defaults
m2w64-gcc-libs-core       5.3.0                         7    defaults
m2w64-gcc-objc            5.3.0                         6    defaults
m2w64-gmp                 6.1.0                         2    defaults
m2w64-headers-git         5.0.0.4636.c0ad18a               2    default
m2w64-isl                 0.16.1                        2    defaults
m2w64-libiconv            1.14                          6    defaults
m2w64-libmangle-git       5.0.0.4509.2e5a9a2               2    default
m2w64-libwinpthread-git   5.0.0.4634.697f757               2    default
m2w64-make                4.1.2351.a80a8b8               2    defaults
m2w64-mpc                 1.0.3                         3    defaults
m2w64-mpfr                3.1.4                         4    defaults
m2w64-pkg-config          0.29.1                        2    defaults
m2w64-toolchain           5.3.0                         7    defaults
m2w64-tools-git           5.0.0.4592.90b8472               2    default
m2w64-windows-default-manifest 6.4                           3    defau
m2w64-winpthreads-git     5.0.0.4634.697f757               2    default
m2w64-zlib                1.2.8                        10    defaults
Mako                      1.0.7                     <pip>
Markdown                  2.6.11                    <pip>
MarkupSafe                1.0                       <pip>
markupsafe                1.0              py36h0e26971_1    defaults
matplotlib                2.2.2            py36h153e9ff_1    defaults
matplotlib                2.2.2                     <pip>
mccabe                    0.6.1            py36hb41005a_1    defaults
mccabe                    0.6.1                     <pip>
menuinst                  1.4.14           py36hfa6e2cd_0    defaults
mistune                   0.8.3            py36hfa6e2cd_1    defaults
mkl                       2018.0.3                      1    defaults
mkl-service               1.1.2            py36h57e144c_4    defaults
mkl_fft                   1.0.1            py36h452e1ab_0    defaults
mkl_random                1.0.1            py36h9258bd6_0    defaults
mock                      2.0.0                     <pip>
mockextras                1.0.2                     <pip>
more-itertools            3.2.0                     <pip>
more-itertools            4.2.0                    py36_0    defaults
mpld3                     0.3                       <pip>
mpmath                    1.0.0            py36hacc8adf_2    defaults
msgpack-python            0.5.6            py36he980bc4_0    defaults
msys2-conda-epoch         20160418                      1    defaults
multipledispatch          0.5.0                    py36_0    defaults
multiprocess              0.70.5                    <pip>
multiprocessing-on-dill   3.5.0a4                   <pip>
munch                     2.2.0                     <pip>
mypy                      0.600                     <pip>
navigator-updater         0.2.1                    py36_0    defaults
nbconvert                 5.3.1            py36h8dc0fde_0    defaults
nbformat                  4.4.0            py36h3a5bc1b_0    defaults
nbformat                  4.4.0                     <pip>
nbopen                    0.6                       <pip>
ndg-httpsclient           0.4.3                     <pip>
networkx                  2.1                      py36_0    defaults
nose                      1.3.7            py36h1c3779e_2    defaults
nose-parameterized        0.6.0                     <pip>
notebook                  5.5.0                    py36_0    defaults
Nuitka                    0.5.29.4                  <pip>
numba                     0.38.1                    <pip>
numexpr                   2.6.4                     <pip>
numexpr                   2.6.5            py36hcd2f87e_0    defaults
numpy                     1.13.3           py36h5c71026_4    defaults
numpy                     1.13.3                    <pip>
numpy                     1.14.5                    <pip>
numpydoc                  0.8.0                    py36_0    defaults
odo                       0.5.1            py36h7560279_0    defaults
olefile                   0.45.1                   py36_0    defaults
openpyxl                  2.5.4                    py36_0    defaults
openssl                   1.0.2o               h8ea7d77_0    defaults
ordereddict               1.1                       <pip>
packaging                 17.1                     py36_0    defaults
pandas                    0.23.1           py36h830ac7b_0    defaults
pandas-datareader         0.6.0                     <pip>
pandoc                    2.2.1                h1a437c5_0    defaults
pandocfilters             1.4.2            py36h3ef6317_1    defaults
paramiko                  2.4.0                     <pip>
paramz                    0.9.1                     <pip>
parquet-cpp               1.4.0.pre                vc14_0  [vc14]  cond
parso                     0.2.1                    py36_0    defaults
partd                     0.3.8            py36hc8e763b_0    defaults
path.py                   11.0.1                   py36_0    defaults
pathlib2                  2.3.2                    py36_0    defaults
pathtools                 0.1.2                     <pip>
patsy                     0.5.0                    py36_0    defaults
pbr                       3.1.1                     <pip>
pdfkit                    0.6.1                     <pip>
pdfpages                  0.1.0                     <pip>
pep8                      1.7.1                    py36_0    defaults
pickleshare               0.7.4            py36h9de030f_0    defaults
pillow                    5.1.0            py36h0738816_0    defaults
pip                       10.0.1                   py36_0    defaults
plotly                    2.4.1                     <pip>
pluggy                    0.6.0            py36hc7daf1e_0    defaults
ply                       3.11                     py36_0    defaults
pockets                   0.5.1                     <pip>
prompt_toolkit            1.0.15           py36h60b8f86_0    defaults
protobuf                  3.5.0.post1               <pip>
psutil                    5.4.6            py36hfa6e2cd_0    defaults
py                        1.5.3                    py36_0    defaults
py-earth                  0.0.0                     <pip>
pyarrow                   0.9.0                     <pip>
pyasn1                    0.3.7                     <pip>
pybasicbayes              0.2.2                     <pip>
pyclust                   0.2.0                     <pip>
pycodestyle               2.3.1                     <pip>
pycosat                   0.6.3            py36h413d8a4_0    defaults
pycparser                 2.18             py36hd053e01_1    defaults
pycparser                 2.18                      <pip>
pycrypto                  2.6.1            py36hfa6e2cd_8    defaults
pycurl                    7.43.0.2         py36h74b6da3_0    defaults
pyflakes                  2.0.0                    py36_0    defaults
pygments                  2.2.0            py36hb010967_0    defaults
Pygments                  2.2.0                     <pip>
pylint                    1.9.2                    py36_0    defaults
pymongo                   3.5.1                     <pip>
pymysql                   0.8.1                    py36_0    defaults
PyNaCl                    1.2.1                     <pip>
pyodbc                    4.0.23           py36h6538335_0    defaults
pyopenssl                 18.0.0                   py36_0    defaults
pyparsing                 2.2.0                     <pip>
pyparsing                 2.2.0            py36h785a196_1    defaults
PyPDF2                    1.26.0                    <pip>
pypng                     0.0.18                    <pip>
pyqt                      5.9.2            py36h1aa27d4_0    defaults
pyreadline                2.1                       <pip>
pysocks                   1.6.8                    py36_0    defaults
pytables                  3.4.3            py36he6f6034_1    defaults
pytest                    3.6.1                    py36_0    defaults
pytest-arraydiff          0.2                      py36_0    defaults
pytest-doctestplus        0.1.3                    py36_0    defaults
pytest-openfiles          0.3.0                    py36_0    defaults
pytest-remotedata         0.3.0                    py36_0    defaults
python                    3.6.6                hea74fb7_0    defaults
python-dateutil           2.7.2                     <pip>
python-dateutil           2.7.3                    py36_0    defaults
python-editor             1.0.3                     <pip>
python-snappy             0.5.2            py36h6538335_0    defaults
pytz                      2018.4                   py36_0    defaults
pytzdata                  2018.3                    <pip>
pywin32                   223              py36hfa6e2cd_1    defaults
pywinpty                  0.5.4                    py36_0    defaults
pyyaml                    3.12             py36h1d1928f_1    defaults
pyzmq                     17.0.0                    <pip>
pyzmq                     17.0.0           py36hfa6e2cd_1    defaults
qt                        5.9.5            vc14he4a7d60_0    defaults
qtawesome                 0.4.4            py36h5aa48f6_0    defaults
qtconsole                 4.3.1            py36h99a29a9_0    defaults
qtpy                      1.4.2                    py36_0    defaults
QuantLib-Python           1.13                      <pip>
quantumpy                 0.0.1                     <pip>
rabbitmq                  0.2.0                     <pip>
redis                     2.10.6                    <pip>
requests                  2.18.4           py36h4371aae_1    defaults
requests                  2.18.4                    <pip>
requests-file             1.4.3                     <pip>
requests-ftp              0.3.1                     <pip>
requests-oauthlib         0.8.0                     <pip>
responses                 0.8.1                     <pip>
retrying                  1.3.4.dev0                <pip>
rope                      0.10.7           py36had63a69_0    defaults
ruamel_yaml               0.15.37          py36hfa6e2cd_2    defaults
scikit-learn              0.19.1           py36h53aea1b_0    defaults
scikit-optimize           0.5.1                     <pip>
scikit-plot               0.3.5                     <pip>
scipy                     1.0.0                     <pip>
scipy                     1.0.1                     <pip>
scipy                     1.1.0            py36h672f292_0    defaults
scp                       0.10.2                    <pip>
seaborn                   0.8.1            py36h9b69545_0    defaults
seasonal                  0.3.0                     <pip>
send2trash                1.5.0                    py36_0    defaults
setuptools                39.2.0                   py36_0    defaults
simplegeneric             0.8.1                    py36_2    defaults
simplejson                3.13.2                    <pip>
singledispatch            3.4.0.3          py36h17d0c80_0    defaults
sip                       4.19.8           py36h6538335_0    defaults
six                       1.11.0           py36h4db2310_1    defaults
smmap2                    2.0.3                     <pip>
snappy                    2.6                       <pip>
snappy                    1.1.7                h777316e_3    defaults
snappy-manifolds          1.0                       <pip>
snowballstemmer           1.2.1            py36h763602f_0    defaults
sortedcollections         1.0.1                    py36_0    defaults
sortedcontainers          2.0.4                    py36_0    defaults
spherogram                1.8                       <pip>
sphinx                    1.7.5                    py36_0    defaults
sphinx-rtd-theme          0.2.4                     <pip>
sphinxcontrib             1.0              py36hbbac3d2_1    defaults
sphinxcontrib-websupport  1.1.0                    py36_1    defaults
SQLAlchemy                1.1.18                    <pip>
sqlalchemy                1.2.8            py36hfa6e2cd_0    defaults
SQLAlchemy                1.2.5                     <pip>
SQLAlchemy-Utc            0.10.0                    <pip>
sqlite                    3.23.1               h35aae40_0    defaults
statsmodels               0.9.0            py36h452e1ab_0    defaults
swig                      3.0.12               h047fa9f_3    defaults
sympy                     1.1.1            py36h96708e0_0    defaults
tables                    3.4.2                     <pip>
tblib                     1.3.2            py36h30f5020_0    defaults
terminado                 0.8.1                    py36_1    defaults
testfixtures              5.3.0                     <pip>
testpath                  0.3.1            py36h2698cfe_0    defaults
texttable                 0.9.1                     <pip>
Theano                    1.0.2                     <pip>
thrift                    0.11.0                    <pip>
tia                       0.3.0                     <pip>
tk                        8.6.7                hcb92d03_3    defaults
toolz                     0.9.0                    py36_0    defaults
tornado                   5.0.2                    py36_0    defaults
tqdm                      4.19.1.post1              <pip>
traitlets                 4.3.2            py36h096827d_0    defaults
treelib                   1.4.0                     <pip>
typed-ast                 1.1.0                     <pip>
typing                    3.6.4                    py36_0    defaults
tzlocal                   1.4                       <pip>
unicodecsv                0.14.1           py36h6450c06_0    defaults
urllib3                   1.22             py36h276f60a_0    defaults
vc                        14                   h0510ff6_3    defaults
vine                      1.1.4                     <pip>
vispy                     0.5.1                     <pip>
vs2015_runtime            14.0.25123                    3    defaults
waitress                  1.1.0                     <pip>
watchdog                  0.8.3                     <pip>
wcwidth                   0.1.7            py36h3d5aa90_0    defaults
webencodings              0.5.1            py36h67c50ae_1    defaults
WebOb                     1.7.4                     <pip>
websocket-client          0.44.0                    <pip>
WebTest                   2.0.29                    <pip>
werkzeug                  0.14.1                   py36_0    defaults
wheel                     0.31.1                   py36_0    defaults
widgetsnbextension        3.2.1                    py36_0    defaults
win_inet_pton             1.0.1            py36he67d7fd_1    defaults
win_unicode_console       0.5              py36hcdbd4b5_0    defaults
wincertstore              0.2              py36h7fe50ca_0    defaults
winpty                    0.4.3                         4    defaults
wkhtmltopdf               0.2                       <pip>
wrapt                     1.10.11          py36he5f5981_0    defaults
WTForms                   2.1                       <pip>
xlrd                      1.1.0            py36h1cb58dc_1    defaults
xlsxwriter                1.0.5                    py36_0    defaults
xlwings                   0.11.8                   py36_0    defaults
xlwt                      1.3.0            py36h1a4751e_0    defaults
yaml                      0.1.7                hc54c509_2    defaults
zeromq                    4.2.5                hc6251cf_0    defaults
zict                      0.1.3            py36h2d8e73e_0    defaults
zipline                   1.1.1+152.g18e4186f           <pip>
zlib                      1.2.11               h8395fce_2    defaults

[msarahan]

We are in the process of building all of the packages. You won't be able to update to 3.7 until all of the packages in your environment are available. You can create a separate environment to play with python 3.7, but it won't have many of your packages available.

[pllim]

I have this same problem. All I want is a new fresh environment with Python 3.7 on Windows 7 64-bit. I don't even want all the extra packages as I understand those take longer to be made available in Python 3.7. However, I still encountered the same problem. Why is this not working?

conda create -n py37 python=3.7

More info: I tried with both Anaconda and Miniconda installations (I used 64-bit installer with Python 3.6 as default).

Here is my conda info python=3.7:

python 3.7.0 hea74fb7_0
-----------------------
file name   : python-3.7.0-hea74fb7_0.tar.bz2
name        : python
version     : 3.7.0
build string: hea74fb7_0
build number: 0
channel     : https://repo.anaconda.com/pkgs/main/win-64
size        : 21.1 MB
arch        : None
constrains  : ()
license     : PSF
md5         : 0d32017fe32d896f49629ff1ca68e399
platform    : None
subdir      : win-64
timestamp   : 1530191353802
url         : https://repo.anaconda.com/pkgs/main/win-64/python-3.7.0-hea74fb7_0.tar.bz2
dependencies:
    vc 14.*
    pip

But I seem to have the dependencies listed above?

# packages in environment at ...\AppData\Local\Continuum\miniconda3:
#
# Name                    Version                   Build  Channel
vc                        14                   h0510ff6_3
pip                       10.0.1                   py36_0

[mingwandroid]

Well for me:

conda create -n py37_2 python=3.7
Solving environment: done

## Package Plan ##

  environment location: C:\Users\builder\m64\envs\py37_2

  added / updated specs:
    - python=3.7


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    python-3.7.0               |       hea74fb7_0        21.1 MB  defaults

The following NEW packages will be INSTALLED:

    python:         3.7.0-hea74fb7_0 defaults
    vc:             14-h0510ff6_3    defaults
    vs2015_runtime: 14.0.25123-3     defaults

What do you get from just conda info?

[pllim]

conda info on my "base" env produced this:

$ conda info

     active environment : None
       user config file : C:\...\.condarc
 populated config files : C:\...\.condarc
          conda version : 4.5.4
    conda-build version : not installed
         python version : 3.6.5.final.0
       base environment : C:\...\AppData\Local\Continuum\miniconda3  (writable)
           channel URLs : https://conda.anaconda.org/conda-forge/win-64
                          https://conda.anaconda.org/conda-forge/noarch
                          https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/free/win-64
                          https://repo.anaconda.com/pkgs/free/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/pro/win-64
                          https://repo.anaconda.com/pkgs/pro/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
          package cache : C:\...\AppData\Local\Continuum\miniconda3\pkgs
                          C:\...\AppData\Local\conda\conda\pkgs
       envs directories : C:\...\AppData\Local\Continuum\miniconda3\envs
                          C:\...\AppData\Local\conda\conda\envs
                          C:\...\.conda\envs
               platform : win-64
             user-agent : conda/4.5.4 requests/2.18.4 CPython/3.6.5 Windows/7 Windows/6.1.7601
          administrator : False
             netrc file : None
           offline mode : False

$ conda create -n py37 python=3.7
Solving environment: ...working... failed

UnsatisfiableError: The following specifications were found to be in conflict:
  - python=3.7
Use "conda info <package>" to see the dependencies for each package.

[mingwandroid]

You have conda-forge as your top priority channel.

Please use -c defaults on your command line to see if that avoids whatever conflict you are seeing here.

[pllim]

Unfortunately, that did not solve the conflict.

$ conda create -n py37 python=3.7 -c defaults
Solving environment: ...working... failed

UnsatisfiableError: The following specifications were found to be in conflict:
  - python=3.7
Use "conda info <package>" to see the dependencies for each package.

[mingwandroid]

Earlier we were missing some builds against python 3.7 stack such as pip but that should be available now. I wonder if there's some mirroring issue going on?

[pllim]

🤷‍♀️ I guess I'll try again next week. Thank you for your help!

[mcguipat]

This is not specific to windows, I'm seeing the same dependency failures on linux and mac. Perhaps the topic can be amended.

:~$ conda install python=3.7
Fetching package metadata ...........
Solving package specifications: .

UnsatisfiableError: The following specifications were found to be in conflict:

• conda -> pycosat -> python 2.6* -> openssl 1.0.1*
• conda -> pycosat -> python 2.6* -> readline 6.2*
• conda -> pycosat -> python 2.6* -> tk 8.5*
• python 3.7*
  Use "conda info " to see the dependencies for each package.

[mingwandroid]

@mcguipat, you are trying to replace the core component of a full python stack (probably 3.6 for which we have released hundreds of packages many of which you will have installed) with a python stack that's currently in the process of being built out (this involves roughly 680 packages for 6 different OS variants). At present only certifi, python, pip, setuptools and wheel packages have been released and only for 64-bit OSes (but also excluding linux-ppc64le).

If you want to play with the python interpreter and this very limited set of packages you need to do so in a new environment until all the packages have been released. For that you should do and see:

conda create -n py37 python=3.7
Solving environment: done

## Package Plan ##

  environment location: /opt/conda/envs/py37

  added / updated specs:
    - python=3.7


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    python-3.7.0               |       hc3d631a_0        31.7 MB  https://repo.anaconda.com/pkgs/main
    wheel-0.31.1               |           py37_0          62 KB  https://repo.anaconda.com/pkgs/main
    setuptools-39.2.0          |           py37_0         550 KB  https://repo.anaconda.com/pkgs/main
    pip-10.0.1                 |           py37_0         1.7 MB  https://repo.anaconda.com/pkgs/main
    certifi-2018.4.16          |           py37_0         142 KB  https://repo.anaconda.com/pkgs/main
    ------------------------------------------------------------
                                           Total:        34.1 MB

The following NEW packages will be INSTALLED:

    ca-certificates: 2018.03.07-0            https://repo.anaconda.com/pkgs/main
    certifi:         2018.4.16-py37_0        https://repo.anaconda.com/pkgs/main
    libedit:         3.1.20170329-h6b74fdf_2 https://repo.anaconda.com/pkgs/main
    libffi:          3.2.1-hd88cf55_4        https://repo.anaconda.com/pkgs/main
    libgcc-ng:       7.2.0-hdf63c60_3        https://repo.anaconda.com/pkgs/main
    libstdcxx-ng:    7.2.0-hdf63c60_3        https://repo.anaconda.com/pkgs/main
    ncurses:         6.1-hf484d3e_0          https://repo.anaconda.com/pkgs/main
    openssl:         1.0.2o-h20670df_0       https://repo.anaconda.com/pkgs/main
    pip:             10.0.1-py37_0           https://repo.anaconda.com/pkgs/main
    python:          3.7.0-hc3d631a_0        https://repo.anaconda.com/pkgs/main
    readline:        7.0-ha6073c6_4          https://repo.anaconda.com/pkgs/main
    setuptools:      39.2.0-py37_0           https://repo.anaconda.com/pkgs/main
    sqlite:          3.24.0-h84994c4_0       https://repo.anaconda.com/pkgs/main
    tk:              8.6.7-hc745277_3        https://repo.anaconda.com/pkgs/main
    wheel:           0.31.1-py37_0           https://repo.anaconda.com/pkgs/main
    xz:              5.2.4-h14c3975_4        https://repo.anaconda.com/pkgs/main
    zlib:            1.2.11-ha838bed_2       https://repo.anaconda.com/pkgs/main

Proceed ([y]/n)? y


Downloading and Extracting Packages
python-3.7.0         | 31.7 MB | ####################################################################################################################################################################################################################################### | 100%
wheel-0.31.1         |   62 KB | ####################################################################################################################################################################################################################################### | 100%
setuptools-39.2.0    |  550 KB | ####################################################################################################################################################################################################################################### | 100%
pip-10.0.1           |  1.7 MB | ####################################################################################################################################################################################################################################### | 100%
certifi-2018.4.16    |  142 KB | ####################################################################################################################################################################################################################################### | 100%
Preparing transaction: done
Executing transaction: done
#
# To activate this environment, use
#
#     $ conda activate py37
#
# To deactivate an active environment, use
#
#     $ conda deactivate

(devenv) bash-4.1# conda activate py37
(py37) bash-4.1# python
Python 3.7.0 (default, Jun 28 2018, 13:15:42)
[GCC 7.2.0] :: Anaconda, Inc. on linux
Type "help", "copyright", "credits" or "license" for more information.

[Post169]

@mingwandroid I tried the conda create -n py37 python=3.7 command you said should work, but like everyone else I still got the UnsatisfiableError. From what you posted it looks like maybe vc is not yet available.
But thank you for explaining the nature of the difficulty!

[mingwandroid]

Well, I'm still a bit baffled I must admit.

[mcguipat]

@mingwandroid I obviously understand the extent of the dependencies; however, it seems to only be a small number that explicitly restrict version to 3.6. I would have to assume python 3.x releases are backward compatible, so I don’t really see the substance in your comment.

[nehaljwani]

Python->pip->wheel->wincertstore and wincertstore for py37 hasn't been uploaded yet.

So, to test out python 3.7 on windows, do:

conda create -n py37 python=3.7 c3i_test::wincertstore

OR:

conda config --set add_pip_as_python_dependency False
conda create -n py37 python=3.7

[mingwandroid]

I would have to assume python 3.x releases are backward compatible, so I don’t really see the substance in your comment.

You don't have to assume incorrect assumptions of you don't want to.

[sandys]

is this bug only tracking windows ?

For a fresh install of miniconda on Linux and then running an upgrade, I get a failure

~/Code/miniconda3/bin/conda install -c anaconda python=3.7                                                                                               
Solving environment: failed

UnsatisfiableError: The following specifications were found to be in conflict:
  - chardet -> python=3.6
  - python=3.7
Use "conda info <package>" to see the dependencies for each package.

[mingwandroid]

This is not a bug, it is a lack of packages. Please if you want to play with python 3.7 at present, create a new environment to do so in. And don't expect many packages to exist yet.

[d1vanloon]

As @nehaljwani mentioned above, the main issue that was preventing us from creating new environments was probably the absence of wincertstore. Now that it is available, I was able to create a fresh environment by excluding default packages. ipython does not yet support 3.7.

conda create -n py37 python=3.7 --no-default-packages

[CharlesAydin]

What is the timeline for all the packages to be compatible with 3.7?

[mingwandroid]

What is the timeline for all the packages to be compatible with 3.7?

For linux (x86. x86-64, ppc64le) and macOS the full suite of Python 3.7 packages are already available.

For Windows, when it's done! While it's not really possible to give a reliable timeline for building the latest versions of 1000 packages and fixing all the issues encountered I'm estimating another 3 days or so.

[FHTMitchell]

Hi @mingwandroid , are the windows packages ready now? It's been a month but I'm still having problems.

[mingwandroid]

Things should be better. Please open an issue detailing the exact nature of your exact issue filling all the requested information in.

[mmcclish]

I am not able to update python from 3.6.6 to the latest version in Anaconda Navigator. After attempting, the pop-up window claims "All requested packages already installed", which according to Anaconda is not correct. I confirmed the version I am using is in fact 3.6.6. I using 64-bit Win7. Any idea what's going on here?