Tracing variable scope (local vs. global)

[Manuel Graune]

Hello,

consider the following piece of code:

a=1
b=2

def foo(c):
    b=3
    return a + b + c

In this case, when calling "foo", "a" will take the global value,
"b" will take the local value and "c" will take the value assigned
when calling the function.

Since I consider this behaviour a possible source of bugs due to
personal sloppiness (e. g. forgetting to put "a=4" inside the
function-body):

Is there any way to automatically check that all variables in a
function are either local or passed in as arguments?

Regards,

Manuel Graune

-- 
A hundred men did the rational thing. The sum of those rational choices was
called panic. Neal Stephenson -- System of the world
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