Python之for循环

Posted 2020-12-23 小肥羊要进步

1.遍历字符串中每个字符的for循环

name="Ted"
for character in name:
    print(character)

2. for遍历列表元素

shows=["GOT",
       "You"
       "Know"   
]
for show in shows:
    print(show)

3.for遍历元组中的元素

coms=(
    "World",
    "always",
    "sunshine"
)
for com in coms:
    print(com)
4.for循环遍历字典元素

people={
    "Key1":"value1",
    "Key2":"value2",
    "Key3":"value3"
}
for peo in people:
    print(peo)
5.使用for循环修改可变且可迭代对象中的元素

people={
    "Key1":"value1",
    "Key2":"value2",
    "Key3":"value3"
}
for peo in people:
    print(peo)
由于访问可迭代对象中索引和元素是很常见的操作，python提供了专门的语法

tv=[
    "GOT","Narcos","Vice"
]

for i,show in enumerate(tv):
    new=tv[i]
    new=new.upper()
    tv[i]=new
print(tv)

6.使用两个for循环获取两个不同列表中的所有字符串，然后将每个字符大写，并放入一个新的列表中

tv=[
    "GOT",
    "Narcos",
    "Vice"
]
coms=[
    "Arrsted Development",
    "friends",
    "Always Sunny"
]
all_shows=[]

for show in tv:
    show=show.upper()
    all_shows.append(show)

for show in coms:
    show =show.upper()
    all_shows.append(show)

print(all_shows)