MAINT: drop Python 2.7 and 3.4

.travis.yml

@@ -10,7 +10,7 @@ env:
    - OPENBLAS_NUM_THREADS=1
 matrix:
   include:
-    - python: 2.7
+    - python: 3.6
       env:
         - PYFLAKES=1
         - PEP8=1
@@ -19,9 +19,12 @@ matrix:
         - pip install pycodestyle==2.3.1
         - pip install pyflakes==1.1.0
       script:
-        - PYFLAKES_NODOCTEST=1 pyflakes scipy benchmarks/benchmarks | grep -E -v 'unable to detect undefined names|assigned to but never used|imported but unused|redefinition of unused|may be undefined, or defined from star imports' > test.out; cat test.out; test \! -s test.out
+        # pyflakes doesn't respect "# noqa" and cannot ignore files, so filter out six.py
+        - PYFLAKES_NODOCTEST=1 pyflakes scipy benchmarks/benchmarks | grep -E -v 'unable to detect undefined names|assigned to but never used|imported but unused|redefinition of unused|may be undefined, or defined from star imports' | grep -E -v 'scipy/_lib/six.py' > test.out; cat test.out; test \! -s test.out
         - pycodestyle scipy benchmarks/benchmarks
-    - python: 2.7
+    - python: 3.7
+      dist: xenial # travis-ci/travis-ci/issues/9815
+      sudo: true
       env:
         - TESTMODE=fast
         - COVERAGE=
@@ -32,7 +35,7 @@ matrix:
       env:
         - TESTMODE=full
         - COVERAGE="--coverage --gcov"
-        - NUMPYSPEC="--upgrade numpy"
+        - NUMPYSPEC="numpy==1.15.4"
     - python: 3.6
       env:
         - TESTMODE=fast
@@ -44,14 +47,14 @@ matrix:
       env:
         - TESTMODE=fast
         - COVERAGE=
-        - NUMPYSPEC="numpy==1.8.2"
+        - NUMPYSPEC="numpy==1.13.3"
         - USE_SDIST=1
-    - python: 3.4
+    - python: 3.6
       env:
         - TESTMODE=fast
         - COVERAGE=
         - USE_WHEEL=1
-        - NUMPYSPEC="--upgrade numpy"
+        - NUMPYSPEC="numpy==1.14.6"
         # The following is needed for optimized "-OO" test run but since we use
         # pytest-xdist plugin for load scheduling its workers don't pick up the
         # flag. This environment variable starts all Py instances in -OO mode.

INSTALL.rst.txt

@@ -31,11 +31,11 @@ PREREQUISITES
 
 SciPy requires the following software installed for your platform:
 
-1) Python__ 2.7 or >= 3.4
+1) Python__ >= 3.5
 
 __ https://www.python.org
 
-2) NumPy__ >= 1.8.2
+2) NumPy__ >= 1.13.3
 
 __ https://www.numpy.org/
 
@@ -49,7 +49,7 @@ __ http://www.sphinx-doc.org/
 
 5) If you want to build SciPy master or other unreleased version from source
    (Cython-generated C sources are included in official releases):
-   Cython__ >= 0.23.4
+   Cython__ >= 0.28.5
 
 __ http://cython.org/
 

LICENSE.txt

@@ -1,7 +1,7 @@
 Copyright (c) 2001, 2002 Enthought, Inc.
 All rights reserved.
 
-Copyright (c) 2003-2017 SciPy Developers.
+Copyright (c) 2003-2019 SciPy Developers.
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without

appveyor.yml

@@ -26,11 +26,6 @@ environment:
       PYTHON_ARCH: 32
       TEST_MODE: fast
 
-    - PYTHON: C:\Python27-x64
-      PYTHON_VERSION: 2.7
-      PYTHON_ARCH: 64
-      TEST_MODE: fast
-
     - PYTHON: C:\Python35-x64
       PYTHON_VERSION: 3.5
       PYTHON_ARCH: 64
@@ -41,18 +36,6 @@ environment:
       PYTHON_ARCH: 64
       TEST_MODE: full
 
-    - PYTHON: C:\Python27
-      PYTHON_VERSION: 2.7
-      PYTHON_ARCH: 32
-      SKIP_NOTAG: true
-      TEST_MODE: full
-
-    - PYTHON: C:\Python34
-      PYTHON_VERSION: 3.4
-      PYTHON_ARCH: 32
-      SKIP_NOTAG: true
-      TEST_MODE: full
-
     - PYTHON: C:\Python35-x64
       PYTHON_VERSION: 3.5
       PYTHON_ARCH: 64

pavement.py

@@ -125,7 +125,7 @@
 #-------------------------------------------------------
 
 # Default python version
-PYVER="2.7"
+PYVER="3.6"
 
 # Paver options object, holds all default dirs
 options(bootstrap=Bunch(bootstrap_dir="bootstrap"),
@@ -155,40 +155,23 @@
 
 # Wine config for win32 builds
 if sys.platform == "win32":
-    WINE_PY26 = [r"C:\Python26\python.exe"]
-    WINE_PY27 = [r"C:\Python27\python.exe"]
-    WINE_PY32 = [r"C:\Python32\python.exe"]
-    WINE_PY33 = [r"C:\Python33\python.exe"]
-    WINE_PY34 = [r"C:\Python34\python.exe"]
+    WINE_PY35 = [r"C:\Python35\python.exe"]
     WINDOWS_ENV = os.environ
     MAKENSIS = ["makensis"]
 elif sys.platform == "darwin":
-    WINE_PY26 = ["wine", os.environ['HOME'] + "/.wine/drive_c/Python26/python.exe"]
-    WINE_PY27 = ["wine", os.environ['HOME'] + "/.wine/drive_c/Python27/python.exe"]
-    WINE_PY32 = ["wine", os.environ['HOME'] + "/.wine/drive_c/Python32/python.exe"]
-    WINE_PY33 = ["wine", os.environ['HOME'] + "/.wine/drive_c/Python33/python.exe"]
-    WINE_PY34 = ["wine", os.environ['HOME'] + "/.wine/drive_c/Python34/python.exe"]
+    WINE_PY35 = ["wine", os.environ['HOME'] + "/.wine/drive_c/Python35/python.exe"]
     WINDOWS_ENV = os.environ
     WINDOWS_ENV["DYLD_FALLBACK_LIBRARY_PATH"] = "/usr/X11/lib:/usr/lib"
     MAKENSIS = ["wine", "makensis"]
 else:
-    WINE_PY26 = [os.environ['HOME'] + "/.wine/drive_c/Python26/python.exe"]
-    WINE_PY27 = [os.environ['HOME'] + "/.wine/drive_c/Python27/python.exe"]
-    WINE_PY32 = [os.environ['HOME'] + "/.wine/drive_c/Python32/python.exe"]
-    WINE_PY33 = [os.environ['HOME'] + "/.wine/drive_c/Python33/python.exe"]
-    WINE_PY34 = [os.environ['HOME'] + "/.wine/drive_c/Python34/python.exe"]
+    WINE_PY35 = [os.environ['HOME'] + "/.wine/drive_c/Python35/python.exe"]
     WINDOWS_ENV = os.environ
     MAKENSIS = ["wine", "makensis"]
-WINE_PYS = {'3.4':WINE_PY34, '3.3':WINE_PY33, '3.2':WINE_PY32,
-            '2.7':WINE_PY27, '2.6':WINE_PY26}
+WINE_PYS = {'3.5':WINE_PY35}
 
 # Framework Python locations on OS X
 MPKG_PYTHON = {
-        "2.6": "/Library/Frameworks/Python.framework/Versions/2.6/bin/python",
-        "2.7": "/Library/Frameworks/Python.framework/Versions/2.7/bin/python",
-        "3.2": "/Library/Frameworks/Python.framework/Versions/3.2/bin/python3",
-        "3.3": "/Library/Frameworks/Python.framework/Versions/3.3/bin/python3",
-        "3.4": "/Library/Frameworks/Python.framework/Versions/3.4/bin/python3"
+        "3.5": "/Library/Frameworks/Python.framework/Versions/3.5/bin/python3"
         }
 # Full path to the *static* gfortran runtime
 LIBGFORTRAN_A_PATH = "/usr/local/lib/libgfortran.a"

scipy/__init__.py

@@ -108,9 +108,9 @@
 
     from scipy.version import version as __version__
     from scipy._lib._version import NumpyVersion as _NumpyVersion
-    if _NumpyVersion(__numpy_version__) < '1.8.2':
+    if _NumpyVersion(__numpy_version__) < '1.13.3':
         import warnings
-        warnings.warn("Numpy 1.8.2 or above is recommended for this version of "
+        warnings.warn("Numpy 1.13.3 or above is required for this version of "
                       "scipy (detected version %s)" % __numpy_version__,
                       UserWarning)
 

scipy/cluster/_optimal_leaf_ordering.pyx

@@ -88,7 +88,7 @@ cdef int _simultaneous_sort(float* dist, int* idx,
         # The smallest of the three is moved to the beginning of the array,
         # the middle (the pivot value) is moved to the end, and the largest
         # is moved to the pivot index.
-        pivot_idx = size / 2
+        pivot_idx = size // 2
         if dist[0] > dist[size - 1]:
             dual_swap(dist, idx, 0, size - 1)
         if dist[size - 1] > dist[pivot_idx]:

scipy/optimize/_trlib/_trlib.pyx

@@ -1,6 +1,6 @@
 from scipy.optimize._trustregion import (_minimize_trust_region, BaseQuadraticSubproblem)
 import numpy as np
-cimport ctrlib
+from . cimport ctrlib
 cimport libc.stdio
 cimport numpy as np
 

scipy/special/_ellip_harm.pxd

@@ -63,7 +63,7 @@ cdef inline double* lame_coefficients(double h2, double k2, int n, int p,
 
     cdef double s2, alpha, beta, gamma, lamba_romain, pp, psi, t1, tol, vl, vu
     cdef int r, tp, j, size, i, info, lwork, liwork, c, iu
-    cdef char t
+    cdef Py_UNICODE t
 
     r = n/2
     alpha = h2

scipy/stats/_distn_infrastructure.py

@@ -354,11 +354,6 @@ def instancemethod(func, obj, cls):
 for obj in [s for s in dir() if s.startswith('_doc_')]:
     exec('del ' + obj)
 del obj
-try:
-    del s
-except NameError:
-    # in Python 3, loop variables are not visible after the loop
-    pass
 
 
 def _moment(data, n, mu=None):

setup.py

@@ -26,13 +26,11 @@
 import sysconfig
 
 
-if sys.version_info[:2] < (2, 7) or (3, 0) <= sys.version_info[:2] < (3, 4):
-    raise RuntimeError("Python version 2.7 or >= 3.4 required.")
+if sys.version_info[:2] < (3, 5):
+    raise RuntimeError("Python version >= 3.5 required.")
+
+import builtins
 
-if sys.version_info[0] < 3:
-    import __builtin__ as builtins
-else:
-    import builtins
 
 CLASSIFIERS = """\
 Development Status :: 5 - Production/Stable
@@ -41,12 +39,10 @@
 License :: OSI Approved :: BSD License
 Programming Language :: C
 Programming Language :: Python
-Programming Language :: Python :: 2
-Programming Language :: Python :: 2.7
 Programming Language :: Python :: 3
-Programming Language :: Python :: 3.4
 Programming Language :: Python :: 3.5
 Programming Language :: Python :: 3.6
+Programming Language :: Python :: 3.7
 Topic :: Software Development
 Topic :: Scientific/Engineering
 Operating System :: Microsoft :: Windows
@@ -423,12 +419,12 @@ def setup_package():
     try:
         import numpy
     except ImportError:  # We do not have numpy installed
-        build_requires = ['numpy>=1.8.2']
+        build_requires = ['numpy>=1.13.3']
     else:
         # If we're building a wheel, assume there already exist numpy wheels
         # for this platform, so it is safe to add numpy to build requirements.
         # See gh-5184.
-        build_requires = (['numpy>=1.8.2'] if 'bdist_wheel' in sys.argv[1:]
+        build_requires = (['numpy>=1.13.3'] if 'bdist_wheel' in sys.argv[1:]
                           else [])
 
     metadata = dict(
@@ -446,7 +442,7 @@ def setup_package():
         test_suite='nose.collector',
         setup_requires=build_requires,
         install_requires=build_requires,
-        python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*',
+        python_requires='>=3.5',
     )
 
     if "--force" in sys.argv:

tools/cythonize.py

@@ -84,7 +84,7 @@ def process_pyx(fromfile, tofile, cwd):
     except ImportError:
         pass
 
-    flags = ['--fast-fail']
+    flags = ['--fast-fail', '-3']
     if tofile.endswith('.cxx'):
         flags += ['--cplus']