Package: python-pip
Version: 1.5.6-5
Severity: important
I noticed that 'pip list' on my sid system failed, with a rather obscure
error:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 122, in main
status = self.run(options, args)
File "/usr/lib/python2.7/dist-packages/pip/commands/list.py", line 80, in run
self.run_listing(options)
File "/usr/lib/python2.7/dist-packages/pip/commands/list.py", line 142, in
run_listing
self.output_package_listing(installed_packages)
File "/usr/lib/python2.7/dist-packages/pip/commands/list.py", line 151, in
output_package_listing
if dist_is_editable(dist):
File "/usr/lib/python2.7/dist-packages/pip/util.py", line 367, in
dist_is_editable
req = FrozenRequirement.from_dist(dist, [])
File "/usr/lib/python2.7/dist-packages/pip/__init__.py", line 299, in
from_dist
assert len(specs) == 1 and specs[0][0] == '=='
AssertionError
After some digging, it turned out that the problem was that I have the
'python-pyhsm' package installed, which has a version string of "1.0.4k",
and the extra "k" causes pkg_resources to return a "spec" that looks like
"=== 1.0.4k" (with three equal signs, not two), triggering the assert. Most
packages have a "normalized" version string, for which pkg_resources emits
a spec like "== 1.0.0", which doesn't cause pip to complain.
This was fixed in pip-6.0, which tolerates both == and ===. Sid currently
has a pkg_resources that can emit ===, but not a pip that can tolerate it.
This only shows up if you happen to have at least one python package
installed with a non-normalized version string. For me, I was able to make
pip work again by uninstalling python-pyhsm.
I'm sure you're aware that sid's pip-1.5.6 is pretty out-of-date, and that
6.1.1 is the current version (https://pip.pypa.io/en/stable/news.html).
It's not a trivial upgrade, for sure, but consider this note as supporting
evidence in the campaign to get pip updated :).
cheers,
-Brian
Steps To Reproduce:
apt-get install python-pip python-pyhsm
pip list
Expected:
a list of packages
Got Instead:
part of the list, then an exception with an AssertionError
cheers,
-Brian
-- System Information:
Debian Release: stretch/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 3.16.0-4-amd64 (SMP w/4 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 python-pip depends on:
ii ca-certificates 20141019
ii python 2.7.9-1
ii python-colorama 0.3.3-1
ii python-distlib 0.2.0-1
ii python-html5lib 0.999-3
ii python-pkg-resources 16.0-1
ii python-requests 2.4.3-6
ii python-setuptools 16.0-1
ii python-six 1.9.0-3
pn python:any <none>
Versions of packages python-pip recommends:
ii build-essential 11.7
pn python-dev-all <none>
ii python-wheel 0.24.0-1
python-pip suggests no packages.
-- no debconf information
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