Debian Bug report logs - #815864
python3-venv: unable to create a virtual environment

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Florent Rougon <f.rougon@free.fr>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: python3-venv: unable to create a virtual environment

Date: Thu, 25 Feb 2016 08:47:48 +0100

Package: python3-venv
Version: 3.5.1-2
Severity: serious
Justification: renders the package unusable

Hello,

It seems current Python 3 packages in Debian unstable don't allow
creating a virtual environment anymore with pyvenv and friends:

~/python-venv % /usr/bin/python3.5 -m venv testdir
The virtual environment was not created successfully because ensurepip is not
available.  On Debian/Ubuntu systems, you need to install the python3-venv
package using the following command.

    apt-get install python3-venv

You may need to use sudo with that command.  After installing the python3-venv
package, recreate your virtual environment.

~/python-venv % dpkg -l python3-venv
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-=================================
ii  python3-venv   3.5.1-2      amd64        pyvenv-3 binary for python3 (defa
~/python-venv %

Thanks in advance for looking into this.

Regards

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.4.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages python3-venv depends on:
ii  python3         3.5.1-2
ii  python3.5-venv  3.5.1-7

python3-venv recommends no packages.

python3-venv suggests no packages.

-- no debconf information

Message #10 received at 815864@bugs.debian.org (full text, mbox, reply):

From: Florent Rougon <f.rougon@free.fr>

To: 815864@bugs.debian.org

Subject: Re: python3-venv: unable to create a virtual environment

Date: Thu, 25 Feb 2016 12:56:53 +0100

Some more info:

Inserting a 'print(cmd)' at line 259 showed that the direct cause of
the error message is the command:

  ['/home/flo/python-venv/testdir/bin/python3.5',
   '-Im', 'ensurepip', '--upgrade', '--default-pip']

exiting with a non-zero exit status. Running this command by hand after
the venv creation failed yields:

~/python-venv % /home/flo/python-venv/testdir/bin/python3.5 -Im ensurepip --upgrade --default-pip; echo $?
Traceback (most recent call last):
  File "/usr/lib/python3.5/runpy.py", line 184, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.5/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/usr/lib/python3.5/ensurepip/__main__.py", line 4, in <module>
    ensurepip._main()
  File "/usr/lib/python3.5/ensurepip/__init__.py", line 218, in _main
    version="pip {}".format(version()),
  File "/usr/lib/python3.5/ensurepip/__init__.py", line 74, in version
    assert len(wheel_names) == 1, wheel_names
AssertionError: []
1
~/python-venv %

The assertion error comes from this in
/usr/lib/python3.5/ensurepip/__init__.py:

    wheel_names = glob.glob('/usr/share/python-wheels/pip-*.whl')
    assert len(wheel_names) == 1, wheel_names

and indeed:

~/python-venv % ls /usr/share/python-wheels/pip-*.whl
zsh: no matches found: /usr/share/python-wheels/pip-*.whl
~/python-venv % apt-file search /usr/share/python-wheels/pip-
virtualenv: /usr/share/python-wheels/pip-8.0.2-py2.py3-none-any.whl
~/python-venv %

I then installed the 'virtualenv' package, which does provide the
mentioned file, and tried to recreate the venv from scratch after adding
a 'print(os.getcwd())' right after the previously-added 'print(cmd)' in
/usr/lib/python3.5/venv/__init__.py (lines 259-260, before the 'try'
statement in EnvBuilder._setup_pip()):

~/python-venv % rm -rf testdir
~/python-venv % /usr/bin/python3.5 -m venv testdir
['/home/flo/python-venv/testdir/bin/python3.5', '-Im', 'ensurepip', '--upgrade', '--default-pip']
/home/flo/python-venv
The virtual environment was not created successfully because ensurepip is not
available.  On Debian/Ubuntu systems, you need to install the python3-venv
package using the following command.

    apt-get install python3-venv

You may need to use sudo with that command.  After installing the python3-venv
package, recreate your virtual environment.

~/python-venv % /usr/bin/python3.5 -c "import subprocess; subprocess.check_output(['/home/flo/python-venv/testdir/bin/python3.5', '-Im', 'ensurepip', '--upgrade', '--default-pip'])"
Traceback (most recent call last):
  File "/tmp/tmpicb907db/pip-8.0.2-py2.py3-none-any.whl/pip/_vendor/__init__.py", line 33, in vendored
ImportError: No module named 'pip._vendor.cachecontrol'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.5/runpy.py", line 184, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.5/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/usr/lib/python3.5/ensurepip/__main__.py", line 4, in <module>
    ensurepip._main()
  File "/usr/lib/python3.5/ensurepip/__init__.py", line 269, in _main
    default_pip=args.default_pip,
  File "/usr/lib/python3.5/ensurepip/__init__.py", line 175, in bootstrap
    _run_pip(args + _PROJECTS, additional_paths)
  File "/usr/lib/python3.5/ensurepip/__init__.py", line 65, in _run_pip
    import pip
  File "/tmp/tmpicb907db/pip-8.0.2-py2.py3-none-any.whl/pip/__init__.py", line 12, in <module>
  File "/tmp/tmpicb907db/pip-8.0.2-py2.py3-none-any.whl/pip/exceptions.py", line 6, in <module>
  File "/tmp/tmpicb907db/pip-8.0.2-py2.py3-none-any.whl/pip/_vendor/__init__.py", line 52, in <module>
  File "/tmp/tmpicb907db/pip-8.0.2-py2.py3-none-any.whl/pip/_vendor/__init__.py", line 35, in vendored
ImportError: No module named 'cachecontrol'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.5/subprocess.py", line 626, in check_output
    **kwargs).stdout
  File "/usr/lib/python3.5/subprocess.py", line 708, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['/home/flo/python-venv/testdir/bin/python3.5', '-Im', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1
~/python-venv %

-- 
Florent

Message #15 received at 815864@bugs.debian.org (full text, mbox, reply):

From: Florent Rougon <f.rougon@free.fr>

To: 815864@bugs.debian.org

Subject: Re: python3-venv: unable to create a virtual environment

Date: Mon, 29 Feb 2016 19:54:09 +0100

Simple workaround for this bug:

  1) Create the venv with --without-pip. For instance:

       /usr/bin/python3.5 -m venv --without-pip <venv-dir>

  2) Download https://bootstrap.pypa.io/get-pip.py as ~/tmp/get-pip.py.

  3) Bootstrap pip "manually" in your venv:

       <venv-dir>/bin/python ~/tmp/get-pip.py

HTH

-- 
Florent

Message #24 received at 815864@bugs.debian.org (full text, mbox, reply):

From: Barry Warsaw <barry@debian.org>

To: 815864@bugs.debian.org

Date: Wed, 2 Mar 2016 09:33:28 -0500

[Message part 1 (text/plain, inline)]

Attached is the patch that fixes this problem; it has already been forwarded
to Matthias.  The potentially controversial bit is the new dependency on
virtualenv, which is required to pick up the pip wheel.  Alternatively, we
could split python-virtualenv into a separate -support binary package, but
that of course would have to go through NEW.

[venv.patch (text/x-patch, attachment)]

Message #29 received at 815864@bugs.debian.org (full text, mbox, reply):

From: Barry Warsaw <barry@debian.org>

To: 815864@bugs.debian.org, Matthias Klose <doko@debian.org>

Date: Thu, 3 Mar 2016 17:07:15 -0500

[Message part 1 (text/plain, inline)]

Ignore the last patch.  This one is better because it no longer forces
python3.5-venv to Depends on virtualenv.  With 8.0.3-3, python-pip-whl
contains all the necessary wheels.

[venv.patch (text/x-patch, attachment)]

Message #34 received at 815864@bugs.debian.org (full text, mbox, reply):

From: Barry Warsaw <barry@debian.org>

To: 815864@bugs.debian.org

Date: Wed, 9 Mar 2016 18:12:49 -0500

[Message part 1 (text/plain, inline)]

Patch updated, hopefully for the last time!

[venv.patch (text/x-patch, attachment)]

Message #39 received at 815864-close@bugs.debian.org (full text, mbox, reply):

From: Matthias Klose <doko@ubuntu.com>

To: 815864-close@bugs.debian.org

Subject: Bug#815864: fixed in python3.5 3.5.1-8

Date: Fri, 18 Mar 2016 16:41:19 +0000

Source: python3.5
Source-Version: 3.5.1-8

We believe that the bug you reported is fixed in the latest version of
python3.5, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 815864@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Matthias Klose <doko@ubuntu.com> (supplier of updated python3.5 package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Format: 1.8
Date: Fri, 18 Mar 2016 16:12:19 +0100
Source: python3.5
Binary: python3.5 python3.5-venv libpython3.5-stdlib python3.5-minimal libpython3.5-minimal libpython3.5 python3.5-examples python3.5-dev libpython3.5-dev libpython3.5-testsuite idle-python3.5 python3.5-doc python3.5-dbg libpython3.5-dbg
Architecture: source all amd64
Version: 3.5.1-8
Distribution: unstable
Urgency: medium
Maintainer: Matthias Klose <doko@debian.org>
Changed-By: Matthias Klose <doko@ubuntu.com>
Description:
 idle-python3.5 - IDE for Python (v3.5) using Tkinter
 libpython3.5 - Shared Python runtime library (version 3.5)
 libpython3.5-dbg - Debug Build of the Python Interpreter (version 3.5)
 libpython3.5-dev - Header files and a static library for Python (v3.5)
 libpython3.5-minimal - Minimal subset of the Python language (version 3.5)
 libpython3.5-stdlib - Interactive high-level object-oriented language (standard library
 libpython3.5-testsuite - Testsuite for the Python standard library (v3.5)
 python3.5  - Interactive high-level object-oriented language (version 3.5)
 python3.5-dbg - Debug Build of the Python Interpreter (version 3.5)
 python3.5-dev - Header files and a static library for Python (v3.5)
 python3.5-doc - Documentation for the high-level object-oriented language Python
 python3.5-examples - Examples for the Python language (v3.5)
 python3.5-minimal - Minimal subset of the Python language (version 3.5)
 python3.5-venv - Interactive high-level object-oriented language (pyvenv binary, v
Closes: 815014 815864 816299
Changes:
 python3.5 (3.5.1-8) unstable; urgency=medium
 .
   * Update to 20160318 from the 3.5 branch.
   * Fix python3-venv with updated python-pip packages (Barry Warsaw).
     Closes: #815014, #815864.
   * Fix generating devhelp documentation (Simon McVittie).
     Closes: #816299. LP: #1553633.
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