如何在forloop中运行不同的函数

for i in range(5):
    if i == 0:
        function1()
    elif i == 1:
        function2()
    elif i == 2:
        function3()
    else:
        function4()

functions = [function1, function2, function3, function4]

for i in range(len(functions)):
    functions[i]()

function_map = {
    'function1': function1,
    'function2': function2,
    'function3': function3,
    'function4': function4
}

for key in function_map:
    function_map[key]()