case switch in python

case_switch_python

# Once in a while you really would need case switching: this is how to best do it in python:

def positive_handler(x):
    print("the number {} is positive".format(x))
     
def zero_handler(x):
    print("the number {} is zero".format(x))
     
def negative_handler(x):
    print("the number {} is negative".format(x))     

options = {
    'positive' : positive_handler,
    'zero' : zero_handler,
    'negative' : negative_handler
}


def cond_negative(x):
    return x < 0

def cond_zero(x):
    return x == 0
    
def cond_positive(x):
    return x > 0    

def decide(x):
    if cond_positive(x):
        options['positive'](x)
    elif cond_zero(x):
        options['zero'](x)
    elif cond_negative(x):
        options['negative'](x)

decide(-1)
decide(0)
decide(3)
    return x < 0

def cond_1(x):
    return x == 0
    
def cond_2(x):
    return x > 0    

def decide(x):
    if cond_1():
        options['case0']()
    elif cond_2():
        options['case1']()
    elif cond_3():
        options['case2']()

decide(-1)
decide(0)
decide(3)