Python多方式分支switch case实现举例详解

def switch(choice):
    if choice == 'a':
        print("Case: A")
    elif choice == 'b':
        print("Case: B")
    elif choice == 'c':
        print("Case: C")
    else:
        print("default Case")


switch('a')
switch(1)

# Case: A
# default Case

def switch(case):
    cases = {
        'a': 'Case A',
        'b': 'Case B',
        'c': 'Case C'
    }
    return cases.get(case, 'default Case')


result = switch('b')
print(result)  
# 输出：Case B
result = switch('v')
print(result)  
# default Case

def case_a():
    return 'Case A'


def case_b():
    return 'Case B'


def case_c():
    return 'Case C'


def switch(case):
    cases = {
        'a': case_a,
        'b': case_b,
        'c': case_c
    }
    return cases.get(case, lambda: 'default Case')()


result = switch('b')
print(result)  
# 输出：Case B

def switch(choice):
    match choice:
        case 'a':
            print("Case A")
        case 'b':
            print("Case B")
        case 'c':
            print("Case C")
        case _:
            print("default Case")


switch('b')
# 输出：Case B