Question

In Python, functions behave like any other object, such as an int or a list. That means that you can use functions as arguments to other functions, store functions as dictionary values, or return a function from another function. This leads to many powerful ways to use functions.

def square(x):
    """Square of x."""
    return x*x

def cube(x):
    """Cube of x."""
    return x*x*x

# create a dictionary of functions

funcs = {
    'square': square,
    'cube': cube,
}

x = 2

print square(x)
print cube(x)

for func in sorted(funcs):
    print func, funcs[func](x)

4
8
cube 8
square 4