#Python 的容器迭代

元组、列表、字典和集合，都是可迭代对象，可以通过 for 循环依次读取元素：

#元组

元组依次取得元素：

students:tuple[str, str, str] = ("Tom", "Jerry", "Spike")
for student in students:
    print(student)

>>> Establishing WebAssembly Runtime.

>>> Standby.

#列表

列表依次取得元素：

students:list[str] = ["Tom", "Jerry", "Spike"]
for student in students:
    print(student)

>>> Establishing WebAssembly Runtime.

>>> Standby.

#字典

字典依次取得键：

score_list:dict[str,int] = {
    'Tom': 88,
    'Jerry': 99,
    'Spike': 66
}
for key in score_list:
    print(key, score_list[key])

>>> Establishing WebAssembly Runtime.

>>> Standby.

调用字典的 items 方法可以获得键值对的列表：

score_list:dict[str,int] = {
    'Tom': 88,
    'Jerry': 99,
    'Spike': 66
}
for key,value in score_list.items():    # 这里使用了下一篇的解包语法
    print(key, value)

>>> Establishing WebAssembly Runtime.

>>> Standby.

#集合

元组依次取得元素：

fruits:set[str] = {'Apple', 'Orange', 'Strawberry', 'Banana', 'Pineapple'}
for fruit in fruits:
    print(fruit)

>>> Establishing WebAssembly Runtime.

>>> Standby.

#字符串

字符串也是可迭代对象，依次取得字符：

text:str = "hello world"
for word in text:
    print(word)

>>> Establishing WebAssembly Runtime.

>>> Standby.