Python:避免嵌套IF语句的流程

if condition1:
    # code block 1
elif condition2:
    # code block 2
elif condition3:
    # code block 3
else:
    # code block 4

actions = {
    'option1': function1,
    'option2': function2,
    'option3': function3
}

selected_option = 'option2'
actions[selected_option]()

def action1():
    # code block 1

def action2():
    # code block 2

def action3():
    # code block 3

# 根据条件选择执行的操作
if condition1:
    action1()
elif condition2:
    action2()
elif condition3:
    action3()