Release 1.0.11 broken on python3 with virtualenv

[patricklucas]

I'm not sure of the exact scope of the breakage, but I have found prompt_toolkit to be reliably non-importable in a clean Python >= 3.5 virtualenv on a vanilla system. The affected version is 1.0.11; 1.0.10 works as expected.

plucas@plucas-vm:~$ virtualenv --python python3 venv
Already using interpreter /usr/bin/python3
Using base prefix '/usr'
New python executable in /home/plucas/venv/bin/python3
Also creating executable in /home/plucas/venv/bin/python
Installing setuptools, pkg_resources, pip, wheel...done.
plucas@plucas-vm:~$ venv/bin/pip install prompt-toolkit==1.0.11
Collecting prompt-toolkit==1.0.11
  Using cached prompt_toolkit-1.0.11-py3-none-any.whl
Requirement already satisfied: six>=1.9.0 in ./venv/lib/python3.5/site-packages (from prompt-toolkit==1.0.11)
Collecting wcwidth (from prompt-toolkit==1.0.11)
  Using cached wcwidth-0.1.7-py2.py3-none-any.whl
Installing collected packages: wcwidth, prompt-toolkit
Successfully installed prompt-toolkit-1.0.11 wcwidth-0.1.7
plucas@plucas-vm:~$ venv/bin/python -c "import prompt_toolkit"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/plucas/venv/lib/python3.5/site-packages/prompt_toolkit/__init__.py", line 16, in <module>
    from .interface import CommandLineInterface
  File "/home/plucas/venv/lib/python3.5/site-packages/prompt_toolkit/interface.py", line 27, in <module>
    from .input import StdinInput, Input
ImportError: cannot import name 'StdinInput'
plucas@plucas-vm:~$ venv/bin/pip install prompt-toolkit==1.0.10
Collecting prompt-toolkit==1.0.10
  Using cached prompt_toolkit-1.0.10-py3-none-any.whl
Requirement already satisfied: wcwidth in ./venv/lib/python3.5/site-packages (from prompt-toolkit==1.0.10)
Requirement already satisfied: six>=1.9.0 in ./venv/lib/python3.5/site-packages (from prompt-toolkit==1.0.10)
Installing collected packages: prompt-toolkit
  Found existing installation: prompt-toolkit 1.0.11
    Uninstalling prompt-toolkit-1.0.11:
      Successfully uninstalled prompt-toolkit-1.0.11
Successfully installed prompt-toolkit-1.0.10
plucas@plucas-vm:~$ venv/bin/python -c "import prompt_toolkit"
plucas@plucas-vm:~$ echo $?
0

Python 2 is unaffected:

plucas@plucas-vm:~$ virtualenv --python python2 venv
Running virtualenv with interpreter /usr/bin/python2
New python executable in /home/plucas/venv/bin/python2
Also creating executable in /home/plucas/venv/bin/python
Installing setuptools, pkg_resources, pip, wheel...done.
plucas@plucas-vm:~$ venv/bin/pip install prompt-toolkit==1.0.11
Collecting prompt-toolkit==1.0.11
  Downloading prompt_toolkit-1.0.11-py2-none-any.whl (248kB)
    100% |████████████████████████████████| 256kB 3.3MB/s 
Requirement already satisfied: six>=1.9.0 in ./venv/lib/python2.7/site-packages (from prompt-toolkit==1.0.11)
Collecting wcwidth (from prompt-toolkit==1.0.11)
  Using cached wcwidth-0.1.7-py2.py3-none-any.whl
Installing collected packages: wcwidth, prompt-toolkit
Successfully installed prompt-toolkit-1.0.11 wcwidth-0.1.7
plucas@plucas-vm:~$ venv/bin/python -c "import prompt_toolkit"
plucas@plucas-vm:~$ echo $?
0

I have not tested whether this affects Python 3 outside of a virtualenv, but I would assume it is likely.

[patricklucas]

Note that this means that right now, any new installs of ipython when using python3 will fail:

$ ipython
Traceback (most recent call last):
  File "/home/plucas/venv/bin/ipython", line 7, in <module>
    from IPython import start_ipython
  File "/home/plucas/venv/lib/python3.5/site-packages/IPython/__init__.py", line 49, in <module>
    from .terminal.embed import embed
  File "/home/plucas/venv/lib/python3.5/site-packages/IPython/terminal/embed.py", line 18, in <module>
    from IPython.terminal.interactiveshell import TerminalInteractiveShell
  File "/home/plucas/venv/lib/python3.5/site-packages/IPython/terminal/interactiveshell.py", line 16, in <module>
    from prompt_toolkit.enums import DEFAULT_BUFFER, EditingMode
  File "/home/plucas/venv/lib/python3.5/site-packages/prompt_toolkit/__init__.py", line 16, in <module>
    from .interface import CommandLineInterface
  File "/home/plucas/venv/lib/python3.5/site-packages/prompt_toolkit/interface.py", line 27, in <module>
    from .input import StdinInput, Input
ImportError: cannot import name 'StdinInput'

[jonathanslenders]

Thanks for pointing out. Looking into this right now! Something should have gone wrong building the package.

[dan-coates]

Just came in to report this, went to pip install --upgrade to check the version, and noticed there's now a 1.0.13. Now looking good under that version. :)

[jonathanslenders]

Ok, great. I took me three tries before I got the build right. That's why we're jumping from 1.0.10 to 1.0.13. Thanks a lot for reporting.

[patricklucas]

Thanks for the quick resolution.