Python 编程 | 连载 13 - Python 的流程控制

if bool_result: # 语法块
    do # 业务代码块，有缩进
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info = 'i am iron man'
info_list = info.split(' ')
print(info_list)
if info_list[0] == 'iron':
    info_list[0] = 'spider'
if info_list[1] == 'iron':
    info_list[1] = 'spider'
if info_list[2] == 'iron':
    info_list[2] = 'spider'
if info_list[3] == 'iron':
    info_list[3] = 'spider'
print(info_list)
info_02 = ' '.join(info_list)
print(info_02)
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message = 'Will says:"Keep my wife's name out of your fucking mouth"'
message_list = message.split()
if 'fucking' in message_list:
    message = message.replace('fucking', '*')
print(message)
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if bool_result:
    do
else:
    else do # else 代码块，当满足if条件时执行，需要与if代码块有同样的缩进    
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name = 'peter'
if name == 'stark':
    print('I am IronMan')
else:
    print('Who are you then?')
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if bool_reslut:
    do
elif bool_result:
    elif do # 当前elif对应的代码块， 缩进与上面保持一致
elif bool_result:
    elif do
else:
    else do
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num = 8
if num >= 10:
    print('num的值大于等于10')
elif num > 5:
    print('num的值大于5小于10')
else:
    print('num的值小于等于5')
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for item in iterable: # iterable 既可迭代的数据类型，元组、字典、字符串、列表等
    print(item) # item 是指队列中的一个元素
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list_01 = ['stark', 'wanda', 'steve', 'strange', 'loki']
for item in list_01:
    print(item)
    if item == 'stark':
        print('I am IronMan')
    elif item == 'peter':
        print('I am SpiderMan')
    elif item == 'banner':
        print('Incredible Hulk')
    elif item == 'thor':
        print('Thor Odin')
    else:
        print('We are Heros')
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for key, value in dict.items():
    print(key, value)
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list_dict = [
    {'name': 'stark', 'age': 40},
    {'name': 'thor', 'age': 1500},
    {'name': 'banner', 'age': 40},
    {'name': 'clint', 'age': 37},
]
for i in list_dict:
    for k, v in i.items():
        print(k ,v)
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for item in range(start, stop, step=1):
    print(item)
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for i in range(1, 5):
    print(i)
print('--------------')
for j in range(1, 10, 2):
    print(j)
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for i in range(1, 5):
    print(i)
else:
    print('for循环执行结束')
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for i in range(1, 3):
    print('第一层for循环')
    print(i)
    for j in range(1, 3):
        print('第二层for循环')
        print(i, ',', j)
print(i, j)
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while bool_result:
    do
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count = 0
total = 0
while count <= 100:
    total += count
    count += 1
print(total)
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index = 0
list_01 = ['stark', 'banner', 'peter', 'clint', 'thor']
while index < len(list_01):
    print(list_01[index])
    index += 1
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while bool_result:
    if bool_result:
        contineu
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while bool_result:
    break
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heros = [
    {'name': 'stark', 'age': 40, 'address': 'NY'},
    {'name': 'peter', 'age': 18, 'address': 'NY Queens'},
    {'name': 'steve', 'age': 40, 'address': 'NY Brooklyn'},
    {'name': 'thor', 'age': 1500, 'address': 'Asgard'},
]
humans = []
for hero in heros:
    if hero.get('name') == 'thor':
        continue
    humans.append(hero)
    print('{} is human'.format(hero.get('name')))
print(humans)
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heros = [    {'name': 'stark', 'age': 40, 'address': 'NY'},    {'name': 'peter', 'age': 18, 'address': 'NY Queens'},    {'name': 'steve', 'age': 40, 'address': 'NY Brooklyn'},    {'name': 'thor', 'age': 1500, 'address': 'Asgard'},]
humans = []
for hero in heros:
    if hero.get('name') == 'steve':
        break
    humans.append(hero)
    print('{} is human'.format(hero.get('name')))
else:
    print('for循环执行完毕')
print(humans)
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num = [1, 2, 3, 4, 5, 6, 7, 8, 9]
for i in num:
    # print(i)
    for j in range(1, i+1):
        # 输出乘法口诀
        print('{} * {} = {}'.format(j, i, i * j), end=' ')
        if j == i:
            # 换行
            print()