python 字段遍历

在 Python 中，可以使用 `for` 循环语句来遍历一个列表、元组、字典等数据结构中的元素。下面是一些示例：

1. 遍历列表：

fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
    print(fruit)

输出：

apple
banana
cherry

2. 遍历元组：

numbers = (1, 2, 3)
for num in numbers:
    print(num)

输出：

1
2
3

3. 遍历字典的键：

person = {"name": "Alice", "age": 25, "location": "New York"}
for key in person:
    print(key)

输出：

name
age
location

4. 遍历字典的值：

person = {"name": "Alice", "age": 25, "location": "New York"}
for value in person.values():
    print(value)

输出：

Alice
25
New York

5. 遍历字典的键值对：

person = {"name": "Alice", "age": 25, "location": "New York"}
for key, value in person.items():
    print(key, value)

输出：

name Alice
age 25
location New York