Dealing with multiple Python versions?

Question

I have a problem with my Pip version. I am trying out to install the pyDatalog package, which isn't supported by Anaconda.

   The following specifications were found to be in conflict:
  - pydatalog
  - python 3.5*

In my Ubuntu, I have two versions of Python (2.7 and Anaconda with 3.5). For Python 2.7 I don't even know whether or not Pip is installed.

How can I have two different versions of Pip for different versions of Python on one computer? Can I use one version of Pip for both version of Python?

in general i have pip only for anaconda, but it doesn't work for python 2.7 — Alex
– Alex, Commented Oct 2, 2016 at 16:52
you can try 'whereis python 2.7' it should shows where is python installed. Also as far asi remember pip supports command like 'pip-2.7 command' — nick_gabpe
– nick_gabpe, Commented Oct 2, 2016 at 16:54
when i wrote this i got: pip2.7 Traceback (most recent call last): File "/usr/local/bin/pip2.7", line 9, in <module> load_entry_point('pip==7.1.0', 'console_scripts', 'pip2.7')() File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 558, in load_entry_point File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2682, in load_entry_point File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2355, in load File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2361, in resolve ImportError: No module named pip — Alex
– Alex, Commented Oct 2, 2016 at 16:56
Sorry my fault i forget syntax. Correct command "pip2.7 command" as you can see in stacktrace "/usr/local/bin/pip2.7". For python 3.5 correct command is "pip3.5 command". This is two different versions of pip. — nick_gabpe
– nick_gabpe, Commented Oct 2, 2016 at 17:06
older Python2 did not install pip and you have to do it on your own - on Ubuntu use apt-get or apt - sudo apt-get install python-pip — furas
– furas, Commented Oct 2, 2016 at 17:06

ge7600 · Accepted Answer · 2016-10-02 21:31:34Z

1

Take a look at pyenv located in https://github.com/yyuu/pyenv/blob/master/README.md.

You can install multiple versions of python and pip.

The README has instructions for installing pyenv, installing wanted python versions and switching between them.

answered Oct 2, 2016 at 21:31

ge7600

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