How do you check if the PYTHONSTARTUP variable is defined?

Question

I was looking at this Stack Overflow answer and in it the author says for the original poster to check if the PYTHONSTARTUP variable is defined. I looked around and can not find out how to check to see if it is defined.

How do you check to see if the PYTHONSTARTUP variable is defined?

Are you looking maybe for [PYTHONSTARTUP](http://docs.python.org/using/cmdline.html#envvar-PYTHONSTARTUP) environment variable? — jcollado, Dec 16 '11 at 13:25
That was clearly a typo in the cited answer. It's now edited. — Ned Deily, Dec 16 '11 at 18:06

score 1 · Answer 1 · edited Apr 17 '18 at 16:16

1

Windows (cmd.exe):

echo %PYTHONSTARTUP%

Elsewhere (in a shell, e.g. bash):

echo $PYTHONSTARTUP

In Python:

import os
print(os.environ['PYTHONSTARTUP'])

edited Apr 17 '18 at 16:16

OneCookieLeft

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answered Dec 16 '11 at 12:57

sje397

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When I do `echo $PYTHONSTARTUP` a blank line gets printed in bash. Nothing there it seems. Sorry that I posted the name as PYTHONSTART, it is indeed PYTHONSTARTUP. – Dec 19 '11 at 09:20
So you can put `export PYTHONSTARTUP="/blah/blah.py"` in your `.bashrc` file and it should set the variable when you run bash. – sje397 Dec 20 '11 at 12:30

score 0 · Answer 2 · answered Dec 16 '11 at 12:59

0

I assume it's an environment variable.

import os

if os.getenv("PYTHONSTART"):
    do_something()

answered Dec 16 '11 at 12:59

Chewie

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The name of the var is really `PYTHONSTARTUP` so when I run your code example with `PYTHONSTARTUP` and a `print 'hi'` on the next line, nothing gets printed. Perhaps PYTHONSTARTUP is missing. – Dec 19 '11 at 09:25

How do you check if the PYTHONSTARTUP variable is defined?

2 Answers2