Python global keyword

‘global’ keyword is used to create/change a global variables (You can declare functions, classes etc. also) from local context.

test.py

def function1():
 global data
 data="Hello World"
 
def function2():
 print(data)
 
function1()
function2()

$ python3 test.py 
Hello World

Observe ‘test.py’, even though data is declared in function1, it is accessed by function2. It is because, data is declared in global scope.

References

http://stackoverflow.com/questions/4693120/use-of-global-keyword-in-python

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