How to change globale variables? Hehlp!!

[Terry Reedy]

> Is there a way that file B can chnage the global variable in file A and
> reflect these chnage simulatanouesly to all three files??
>
> Can python do that??

Easily: Access as attribute of module.  Example:

# a.py
filename=None #not known until runtime
def filefuncA():
  fA = open(filename) # does something with filename once set

# b.py
import a
a.filename = raw_input('Enter a filename: ")
a.filefunc() # will now work

#c.py
import a
print a.filename
a.filefunc() # a.filename better have legitimate value

Terry J. Reedy