Using global variables in a function?

Question

How can I create or use a global variable in a function?If I create a global variable in one function, how can I use that global variable in another function? Do I need to store the global variable in a local variable of the function which needs its access?

Answer 1

You can use the "global" keyword to tell python that a specific variable should be considered global. Global variables can be read by any function, but to change their value, you have to use the word "global" again. Here's a quick example:

def foo():

global message

message = "Hello!"

def bar():

print(message)

def bye():

global message

message = "Goodbye."

foo()

bar() #prints "Hello!"

bye()

bar() #prints "Goodbye!"