Pros and cons of Python sources?

[Martin Schöön]

Den 2017-11-28 skrev Cameron Simpson <cs at cskk.id.au>:
> On 28Nov2017 21:23, Martin Schöön <martin.schoon at gmail.com> wrote:
>>The reason I think all is not well is the fact that pip list no only
>>results in a list of packages but at the end of the list (which does
>>not look complete) there is a bunch of error messages.
>
> Please post them. Maybe someone has some insight. (Also post the pip command 
> itself producing the messages.)
>
>From pip.log:

/usr/bin/pip run on Tue Nov 28 22:54:09 2017
apptools (4.2.1)
apt-xapian-index (0.47)
arandr (0.1.7.1)
argparse (1.2.1)

<snip>

pip (1.5.6)
Pivy (0.5.0)
ply (3.4)
Pmw (1.3.2)
pyalsaaudio (0.7)
pyasn1 (0.1.7)
Exception:
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

The line breaks of the error messages are mangled but I hope it makes
sense.

>>Running Python scripts has worked without issues so far.
>
> Fingers crossed.

Indeed.

/Martin