function without args that uses elements precreated

Question

I'm making a program that uses a variable called "lev" that must be used in all my functions, but it doesn't need to be an argument of the function. I mean, the function makes some things and then changes "lev" value, so I need something like this:

>>> lev=8
>>> def t():
>>>      print 1+1
>>>      lev = lev+1
>>> t()
>>> lev
9

That was my first idea, but in practice, doing this, doesn't work.

I can't use "return" to get the new "lev" variable, because there are functions that I need to return a True or False from them AND edits the value of "lev" too, so I can't use the "return" command. Someone has an idea? Thanks

That's what functions are all about, they have their own scope. — Ashwini Chaudhary, Apr 04 '15 at 06:58
Plus the code that you're saying that actually works is not possible. `lev` is a local variable for the function hence it will fail with `UnBoundLocalError`. — Ashwini Chaudhary, Apr 04 '15 at 07:03
there is always a better solution than using global variables. Python functions can return more than one value. — Daniel, Apr 04 '15 at 07:22

score 1 · Accepted Answer · answered Apr 04 '15 at 06:59

1

Define it global lev in the function ...

>>> lev=8
>>> def t():
>>>      global lev
>>>      print 1+1
>>>      lev = lev+1
>>> t()
>>> lev
9

answered Apr 04 '15 at 06:59

Srinath Mandava

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function without args that uses elements precreated

1 Answers1