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How to permenantly set PYTHONPATH for 2.6 and 3.0?

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How to permenantly set PYTHONPATH for 2.6 and 3.0?

28 Days Ago

So I did some research and learn that you use the sys module to set the path for 2.5:

import sys
sys.path.append('usr/local/lib/python2.5/site-packages/')

And that would set the path for 2.5 permanently, but if i do the samething for 2.6 or 3.0, it will not work the next time I open the interpreter.

I thought this path was suppose to be set by default. it's not so i'm trying to set it.

help please
thanks

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28 Days Ago

You can get the path to the site-packages directory like this

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
>>> import os
>>> os.path.join(os.path.split(os.__file__)[0], "site-packages")
'/usr/lib64/python2.6/site-packages'
>>> import os
>>> os.path.join(os.path.split(os.__file__)[0], "site-packages")
'/usr/lib64/python2.6/site-packages'

With python 3:

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
>>> import os                                                   
>>> os.path.join(os.path.split(os.__file__)[0], "site-packages")
'/usr/local/lib/python3.1/site-packages'
>>> import os                                                   
>>> os.path.join(os.path.split(os.__file__)[0], "site-packages")
'/usr/local/lib/python3.1/site-packages'

(on the same machine).

However, you shouldn't normally need to put the site-packages in sys.path yourself. I'd like to see the value of your sys.path just after you start python.

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28 Days Ago

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Originally Posted by Gribouillis

You can get the path to the site-packages directory like this
Help with Code Tags

python Syntax (Toggle Plain Text)
>>> import os
>>> os.path.join(os.path.split(os.__file__)[0], "site-packages")
'/usr/lib64/python2.6/site-packages'
>>> import os >>> os.path.join(os.path.split(os.__file__)[0], "site-packages") '/usr/lib64/python2.6/site-packages'
With python 3:
Help with Code Tags

python Syntax (Toggle Plain Text)
>>> import os                                                   
>>> os.path.join(os.path.split(os.__file__)[0], "site-packages")
'/usr/local/lib/python3.1/site-packages'
>>> import os >>> os.path.join(os.path.split(os.__file__)[0], "site-packages") '/usr/local/lib/python3.1/site-packages'
(on the same machine).

However, you shouldn't normally need to put the site-packages in sys.path yourself. I'd like to see the value of your sys.path just after you start python.

Doesn't even work temporarily.

"No module name file.py" after i did what you wrote and attempted to image a module

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28 Days Ago

What I wrote doesn't do anything, it only computes the path to site-packages.
What you should do is paste your sys.path here (before you do anything with it).

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27 Days Ago

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Originally Posted by Gribouillis

What you should do is paste your sys.path here (before you do anything with it).

What do you mean by that? where is here?

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27 Days Ago

What Gribouillis means is run this code and post the output here on DaniWeb ...

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
# show the system path for Python ( PYTHONPATH )
 
import sys
print( sys.path )
# show the system path for Python ( PYTHONPATH )

import sys
print( sys.path )

You need to run this with the version of Python you are interested in.

Also you cannot permanently set PYTHONPATH as it includes information about the current file you are working with.

Last edited by vegaseat; 27 Days Ago at 4:02 pm. Reason: this

May 'the Google' be with you!

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27 Days Ago

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I thought this path was suppose to be set by default. it's not so i'm trying to set it.

You can modify it on startup by adding PYTHONPATH to your ~/.bash.rc file, or create one if you don't have it.
export PYTHONPATH=$PYTHONPATH:/path/to/add:/second/path

Linux counter #99383

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27 Days Ago

>>> import sys
>>> sys.path
['/home/junlue', '/usr/bin', '/usr/lib/python2.6', '/usr/lib/python2.6/plat-linux2', '/usr/lib/python2.6/lib-tk', '/usr/lib/python2.6/lib-old', '/usr/lib/python2.6/lib-dynload', '/usr/lib/python2.6/dist-packages', '/usr/lib/python2.6/dist-packages/PIL', '/usr/lib/python2.6/dist-packages/gst-0.10', '/var/lib/python-support/python2.6', '/usr/lib/python2.6/dist-packages/gtk-2.0', '/var/lib/python-support/python2.6/gtk-2.0', '/usr/local/lib/python2.6/dist-packages']

This is what i got. no site-pakcages though

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27 Days Ago

I suggest that you write a module

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
# mystartup.py
import os, sys
site_packages = os.path.join(os.path.split(os.__file__)[0], "site-packages")
sys.path.append(site_packages)
# mystartup.py
import os, sys
site_packages = os.path.join(os.path.split(os.__file__)[0], "site-packages")
sys.path.append(site_packages)

and put this module somewhere on your python path. Then when you write a python program, you simply put

Help with Code Tags

python Syntax (Toggle Plain Text)

# at the top of your main program
import mystartup

This should work even if you have different versions of python.

Last edited by Gribouillis; 27 Days Ago at 7:44 pm.

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prouty

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Get site-packages path

#10

17 Days Ago

It's quicker to get the path to site-packages right from the command line:

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Python Syntax (Toggle Plain Text)

python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()"

Last edited by prouty; 17 Days Ago at 1:28 pm. Reason: needed [code]

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