On Friday, February 21, 2014 12:37:59 AM UTC-6, Sam wrote:
> I need to pass a global variable into a python function. However, the global
> variable does not seem to be assigned after the function ends. Is it because
> parameters are not passed by reference? How can I get function parameters to
> be passed by reference in Python?
def func(x):
global ref_name
ref_name = '3.14159'
# rest of the code
# rest of the code
When you call this function the ref_name reference will be set to '3.14159' as
a string and your main code will be able to 'see' it, and other funcs will be
able to 'see' it too... play with it a bit... if other funcs need to write to
it they will also have to use the global ref_name line. As long as other
funcs only read the reference, then the global line is not needed to 'see' the
reference.
As others have noted, python does not have a 'variable' concept (references to
objects instead) and so your question is a little ambiguous.
Also, using global references within functions is not a good idea... generally
speaking.
Cheers
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