Language feature: global keyword

[tusharsadhwani]

Using the global keyword helps define the scope of a specific variable inside a function.

For example:

x = 0

def foo():
    x = 1

foo()
print(x)  # still 0

But, using global:

x = 0

def foo():
    global x  # now, we know to always get/set x from global scope.
    x = 1

foo()
print(x)  # 1