python switch statement

# Here is one way to implement a switch construct
# Switcher is a dictionary data type here
def week(i):
    switcher={
        0:'Sunday',
        1:'Monday',
        2:'Tuesday',
        3:'Wednesday',
        4:'Thursday',
        5:'Friday',
        6:'Saturday'
    }
    return switcher.get(i,"Invalid day of week")

print(week(5)) # Call the function

def switch_demo(argument):
    switcher = {
        1: "January",
        2: "February",
        3: "March",
        4: "April",
        5: "May",
        6: "June",
        7: "July",
        8: "August",
        9: "September",
        10: "October",
        11: "November",
        12: "December"
    }
    print switcher.get(argument, "Invalid month")

def f(x):
    return {
        'a': 1,
        'b': 2,
    }[x]