UnboundLocalError: local variable 'blah' referenced before assignment

[Emile van Sebille]

Daniel
> I have a strange problem where a global variable is no longer
> referenced.
> Stripped down, it's something to the effect of:
>
> def func1():
>    blah='bcd'
>
> def func2():

insert global blah here

>    print blah
>    blah='cde'

this assignment causes blah to be interpreted as a local within func2,
so the print (local) blah above occurs before blah has a value.  Adding
the global blah identifies that blah is not local, allowing the global
value to be used.


--

Emile van Sebille
emile at fenx.com

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