ztlevi
7/19/2017 - 5:33 PM

Switch

The interesting part is that the values in the dictionaries refer to functions that contain the code that would normally be inside the case blocks. Here’s the above code rewritten as a dictionary and functions:

switch.py
content_copyfile_download
options = {0 : zero,
                1 : sqr,
                4 : sqr,
                9 : sqr,
                2 : even,
                3 : prime,
                5 : prime,
                7 : prime,
}
 
def zero():
    print "You typed zero.\n"
 
def sqr():
    print "n is a perfect square\n"
 
def even():
    print "n is an even number\n"
 
def prime():
    print "n is a prime number\n"

# Now that you have the switch case setup, you can actually use it by simply 
# doing a dictionary lookup:
options[num]()