What is the usage of the switch statement in Python?

There is no built-in switch statement in Python, but you can simulate similar functionality using other methods.

1. By using if-elif-else statements, you can achieve a similar effect to a switch statement. Different code blocks are executed based on the variable’s different values.

def switch_case(case):
    if case == 1:
        # 执行case 1的代码
        pass
    elif case == 2:
        # 执行case 2的代码
        pass
    elif case == 3:
        # 执行case 3的代码
        pass
    else:
        # 执行默认代码
        pass

1. Using dictionary mapping: You can achieve similar functionality to a switch statement by using a dictionary, where the keys correspond to different cases and the values correspond to the code blocks to execute.

def switch_case(case):
    switch_dict = {
        1: lambda: print('执行case 1的代码'),
        2: lambda: print('执行case 2的代码'),
        3: lambda: print('执行case 3的代码')
    }
    switch_dict.get(case, lambda: print('默认代码'))()

1. The use of switch statements in programming.

from switchcase import switch

def switch_case(case):
    with switch(case) as s:
        s.case(1, lambda: print('执行case 1的代码'))
        s.case(2, lambda: print('执行case 2的代码'))
        s.case(3, lambda: print('执行case 3的代码'))
        s.default(lambda: print('默认代码'))

It is important to note that in Python, using if-elif-else statements or dictionary mapping is usually sufficient for most cases. Using third-party libraries may increase code complexity and dependencies. Therefore, choose the method that is suitable for your project to simulate a switch.