hi folks,
suppose this snipplet:
spam = 42
def eggs():
print spam
spam = spam + 1
if __name__=="__ma in__":
eggs()
This thows an UnboundLocalErr or at line 4 (print statement). But if I
comment out line 5 (variable assignment), no error occurs.
Can you explain me this, please?
Regards,
Enrico 2 1412 ri****@arcor.de wrote:
spam = 42
def eggs():
print spam
spam = spam + 1
if __name__=="__ma in__":
eggs()
This thows an UnboundLocalErr or at line 4 (print statement). But if I
comment out line 5 (variable assignment), no error occurs.
Can you explain me this, please?
Hi Enrico,
You need to say that you will be modifying the variable in the global
scope, like this:
spam = 42
def eggs():
global spam # <--here
print spam
spam = spam + 1
if __name__=="__ma in__":
eggs()
This can help you: http://www.pasteur.fr/recherche/unit...thon/ch04.html
Pablo
On Sep 29, 8:04 pm, rig...@arcor.de wrote:
hi folks,
suppose this snipplet:
spam = 42
def eggs():
print spam
spam = spam + 1
if __name__=="__ma in__":
eggs()
This thows an UnboundLocalErr or at line 4 (print statement). But if I
comment out line 5 (variable assignment), no error occurs.
Can you explain me this, please?
Regards,
Enrico
If you're going to assign to a global variable in a function, you need
to declare it as such:
spam = 42
def eggs():
global spam
print spam
spam = spam + 1
When Python sees an assignment to an identifier in a function it
creates a variable that is local to the function (otherwise you'd be
unable to create local variables with the same name as any of the
global variables).
-- bjorn This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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