What is the replacement of Switch Case in Python?
Unlike every other programming language we have used before, Python does not have a switch or case statement. To get around this fact, we use dictionary mapping.
Method 1: Switch Case implement in Python using Dictionary Mapping
In Python, a dictionary is an unordered collection of data values that can be used to store data values. Unlike other data types, which can only include a single value per element, dictionaries can also contain a key: value pair.
The key value of the dictionary data type functions as cases in a switch statement when we use the dictionary to replace the Switch case statement.
Python3
# Function to convert number into string # Switcher is dictionary data type here def numbers_to_strings(argument): switcher = { 0 : "zero" , 1 : "one" , 2 : "two" , } # get() method of dictionary data type returns # value of passed argument if it is present # in dictionary otherwise second argument will # be assigned as default value of passed argument return switcher.get(argument, "nothing" ) # Driver program if __name__ = = "__main__" : argument = 0 print (numbers_to_strings(argument)) |
zero
Method 2: Switch Case implement in Python using if-else
The if-else is another method to implement switch case replacement. It is used to determine whether a specific statement or block of statements will be performed or not, i.e., whether a block of statements will be executed if a specific condition is true or not.
Python3
bike = 'Yamaha' if bike = = 'Hero' : print ( "bike is Hero" ) elif bike = = "Suzuki" : print ( "bike is Suzuki" ) elif bike = = "Yamaha" : print ( "bike is Yamaha" ) else : print ( "Please choose correct answer" ) |
bike is Yamaha
Method 3: Switch Case implement in Python using Class
In this method, we are using a class to create a switch method inside the python switch class in Python.
Python3
class Python_Switch: def day( self , month): default = "Incorrect day" return getattr ( self , 'case_' + str (month), lambda : default)() def case_1( self ): return "Jan" def case_2( self ): return "Feb" def case_3( self ): return "Mar" my_switch = Python_Switch() print (my_switch.day( 1 )) print (my_switch.day( 3 )) |
Jan Mar
Switch Case in Python (Replacement)
In this article, we will try to understand Switch Case in Python (Replacement).