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I have installed a python interpreter to a user-directory on a system where I do not have root-access. This system has an older version of Python already installed. I want to make my local installation the default for me. So basically, when I type python, instead of /usr/bin/python I want ~/MyPythonDir/python to be invoked.

Thanks in advance

EDIT: I have changed my PATH to look like this right after I log in:

echo $PATH
~/MyPythonDir:OtherPathStuff

MyPythonDir is the directory containing the python executable. However, when I type

which python

I get

/usr/bin/python

Also, MyPythonDir contains python2.7, but when I try to execute that it says it cannot find it.

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You should specify what shell you're using. Most people will assume Bash or sh. – Dennis Williamson Aug 10 '10 at 15:18

You may want to look into virtualenv

virtualenv is a tool to create isolated Python environments.

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up vote 0 down vote accepted

Ok, I found the problem. In the setup-script (.tcshrc) I set the path using the tilde. When I replaced the tilde by the full path, it worked! Can anyone explain this?

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can you show the exact line you used in .tcshrc? – matthias krull Aug 10 '10 at 14:57
2  
The tilde is really only an interactive command line convenience. There are lots of places it won't get expanded. Use $HOME instead. – Dennis Williamson Aug 10 '10 at 15:16
1  
in scripts it usually does but it gets escaped by "" so echo "$HOME" and echo ~ will expand but echo "~" will not. – matthias krull Aug 10 '10 at 15:55

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