Set an environment variable
Chris F.A. Johnson
cfajohnson at gmail.com
Fri Oct 21 09:55:32 CEST 2005
On 2005-10-21, Christian wrote:
> Erik Max Francis wrote:
>> Christian wrote:
>>> Can I write a .py script that calls a .sh script that executes the
>>> export command and then calls another .py script (and how would the
>>> first .py script look)?
>> No, the shell script that the Python program would invoke would be a
>> different process and so commands executed in it would have no effect on
>> the state of another.
> So executing an .sh script that calls a .py script works different when
> executed from a command promt than when executed from a starter .py script?
No; it's always the same: an environment variable will only be
effective in the process in which it is set, and its children.
When you call another program, whether it's a shell script, python
script, or binary executable, you are starting a new process.
Environment variables set in that process will not affect its
parent (i.e., the process that called it).
Chris F.A. Johnson <http://cfaj.freeshell.org>
Shell Scripting Recipes: A Problem-Solution Approach, 2005, Apress
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