pip显示不正确的软件包版本

Question

I am not sure if this is a bug, or if I am doing something wrong. The situation is the following,

pip list -o 

yields a list of outdated python packages along with what is suppose to be the current installed version. The issue is that I am pretty sure that it is giving me the wrong information on at least some packages as I can verify, as in the example below, that the version of ipython that pip thinks is installed (2.0.0) is not the one that I get when I run ipython from the command prompt (version==2.1.0).

kolmogorov:~# pip list -o | head -15
Warning: cannot find svn location for PEAK-Rules==0.5a1.dev-r2707
Warning: cannot find svn location for prioritized-methods==0.2.2dev-20110830
scipy (Current: 0.13.2 Latest: 0.14.0)
plotly (Current: 1.0.30 Latest: 1.0.32)
SOAPpy (Current: 0.12.21 Latest: 0.12.22)
openpyxl (Current: 1.8.6 Latest: 2.0.3)
networkx (Current: 1.8.1 Latest: 1.9)
setuptools (Current: 3.4.1 Latest: 5.1)
brewer2mpl (Current: 1.3.2 Latest: 1.4)
repoze.who (Current: 1.0.19 Latest: 2.2)
pandas (Current: 0.13.1 Latest: 0.14.0)
pygeocoder (Current: 1.2.2 Latest: 1.2.5)
ipython (Current: 2.0.0 Latest: 2.1.0)
tornado (Current: 3.2 Latest: 3.2.2)
Could not find any downloads that satisfy the requirement vboxapi
Traceback (most recent call last):
  File "/usr/bin/pip", line 9, in <module>
    load_entry_point('pip==1.5.6', 'console_scripts', 'pip')()
  File "/usr/lib/python2.7/dist-packages/pip/__init__.py", line 235, in main
    return command.main(cmd_args)
  File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 156, in main
    logger.fatal('Exception:\n%s' % format_exc())
  File "/usr/lib/python2.7/dist-packages/pip/log.py", line 111, in fatal
    self.log(self.FATAL, msg, *args, **kw)
  File "/usr/lib/python2.7/dist-packages/pip/log.py", line 164, in log
    consumer.flush()
IOError: [Errno 32] Broken pipe


kolmogorov:~# ipython
Python 2.7.7 (default, Jun  3 2014, 16:16:56) 
Type "copyright", "credits" or "license" for more information.

IPython 2.1.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

My question is: Is there a way to have pip understand the correct version of the installed python packages?

Answer 1

You can run the following commands to see where the package is from:

which ipython

and:

pip show ipython

You may have two installations: one that was installed with pip install ipython and an installation via a separate tool (package manager on Linux or Ports/brew on Mac).

Answer 2

So the way to do this properly is a little bit more involved than what I anticipated, but I have to submit it as the proper answer as it actually resolves the issue.

Suppose the package version that is misunderstood by pip is pandas . So that the behavior you observe is that:

pip list --outdated

says that the version of pandas you have installed is 0.14.0 ; but when you inquire about the version of pandas in say ipython :

In [1]: import pandas 

In [2]: pandas.__version__
Out[2]: '0.14.1'

In order to resolve this:

1. run pip show pandas ; it should tell you about the location of the distribution, in my case /usr/local/lib/python2.7/dist-packages
2. redirect to that location cd /usr/local/lib/python2.7/dist-packages
3. run ls -lstrh pandas-0.14.* ; you should see files associated with both your 0.14.1 version and the 0.14.0 one you want to get rid of
4. run rm -rf pandas-0.14.0*.egg-info pandas-0.14.0*.pth

That should be it!

pip show pandas 

should now agree with what pandas.__version__