What is the Python equivalent for a case/switch statement? [duplicate]
While the official docs are happy not to provide switch, I have seen a solution using dictionaries.
For example:
# define the function blocksdef 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"# map the inputs to the function blocksoptions = {0 : zero, 1 : sqr, 4 : sqr, 9 : sqr, 2 : even, 3 : prime, 5 : prime, 7 : prime,}Then the equivalent switch block is invoked:
options[num]()This begins to fall apart if you heavily depend on fall through.
The direct replacement is if/elif/else.
However, in many cases there are better ways to do it in Python. See "Replacements for switch statement in Python?".