Nitin Changlani. wrote:
Hello everyone,
I am fairly new to Python and occasionally run into problems that are
almost always resolved by referring to this mailing-list's archives.
However, I have this one issue which has got me stuck and I hope you
will be tolerant enough to help em out with it!
What I want to achieve is something like the global variables in C/C++:
you declare them in one file and "extern" them in all the files where
you need to use them. I have 3 files: one.py, two.py and three.py as below:
one.py
----------
a = 'place_a'
b = 'place_b'
x = 'place_x'
myList = [a, b, 'place_c']
======================================================================
two.py
----------
import one
def myFunc():
print one.x
print one.myList
======================================================================
three.py
------------
import one
import two
def argFunc():
one.x = 'place_no_x'
one.a = 'place_no_a'
one.b = 'place_no_b'
if __name__ == '__main__':
two.myFunc()
print
argFunc()
two.myFunc()
======================================================================
Output:
-----------
'place_x'
['place_a', 'place_b', 'place_c']
'place_no_x'
['place_a', 'place_b', 'place_c'] (*** instead of ['place_no_a',
'place_no_b', 'place_c'] ***)
The last line in the output is what's baffling me. Can anyone please
help me know if I am doing something wrong?
What's confusing you?
myList gets its value (['place_a', 'place_b', 'place_c']) when one.py is
first imported, and you never change it after that.
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