PYTHONPATH issues

[Stephen Bell]

Hi there. I love the book so far.

I'm having a small problem with Python 2 and Python 3 playing nicely on my MacBook. Here's the error message when I try to do anything with Python 3 (this is from Chapter 2) :

canadabook2-2:superlists stephen.bell$ python3 functional_tests.py

Failed to import the site module

Your PYTHONPATH points to a site-packages dir for Python 2.x but you are running Python 3.x!

     PYTHONPATH is currently: "/usr/local/lib/python2.7/site-packages:"

     You should `unset PYTHONPATH` to fix this.

canadabook2-2:superlists stephen.bell$ 

I can run "unset PYTHONPATH" as suggested, but I have to run it each time I restart terminal or open a new terminal window/tab. Is there an easy way to fix this more permanently (on a mac)?

[Harry Percival]

Did you ever find a fix for this Steve?  I would try uninstalling + reinstalling python 3...

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[Stephen Bell]

Thanks Harry.

Well, it looks like I had a bunch of other junk in my ~/.bash_profile from earlier experiments with Postgres, Ruby on Rails, MacPorts, etc. that was causing the issue. This is the line that was probably causing my trouble:

export PYTHONPATH="/usr/local/lib/python2.7/site-packages:$PYTHONPATH"

I tried running the Python 3.4 installer again, and it's just appending this to the bottom of my .bash-profile each time it's run:

 

# Setting PATH for Python 3.4

# The orginal version is saved in .bash_profile.pysave

PATH="/Library/Frameworks/Python.framework/Versions/3.4/bin:${PATH}"

export PATH

After checking my wife's computer, I figured out that a bash_profile isn't set up in OS X by default (and therefore probably wouldn't cause any damage to major systems if removed), so I just erased everything in that file except for the code above (and the 2.7 installer's equivalent). Now when I open up terminal, I can get to "python" and "python3" without any trouble.

I may have trouble later on with some of those other products (MacPorts, RVM, Postgres, etc.), but for now this works, so I'll deal with those later.

If anyone else is reading this and using OS X, you can edit your .bash-profile like this from terminal:

open ~/.bash_profile

On Sunday, July 20, 2014 5:37:34 AM UTC-5, Harry Percival wrote:

Did you ever find a fix for this Steve?  I would try uninstalling + reinstalling python 3...

On 19 July 2014 03:22, Stephen Bell <stephe...@gmail.com> wrote:

Hi there. I love the book so far.

I'm having a small problem with Python 2 and Python 3 playing nicely on my MacBook. Here's the error message when I try to do anything with Python 3 (this is from Chapter 2) :

canadabook2-2:superlists stephen.bell$ python3 functional_tests.py

Failed to import the site module

Your PYTHONPATH points to a site-packages dir for Python 2.x but you are running Python 3.x!

     PYTHONPATH is currently: "/usr/local/lib/python2.7/site-packages:"

     You should `unset PYTHONPATH` to fix this.

canadabook2-2:superlists stephen.bell$ 

I can run "unset PYTHONPATH" as suggested, but I have to run it each time I restart terminal or open a new terminal window/tab. Is there an easy way to fix this more permanently (on a mac)?

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To unsubscribe from this group and stop receiving emails from it, send an email to obey-the-testing-goat-book+unsub...@googlegroups.com.

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[Claudia Rodriguez]

Thank for the detailed response. It was useful for learning

Thanks Harry.