Python List、Tuple、Set、Dict 遍历

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List 遍历

l = [1, 2, 3, 4, 5, 6]

for i in l:
    print(i)

for i in range(len(l)):
    print(i, l[i])

Tuple 遍历

tup = (1, 2, 3, 1, 2, 3)

for i in tup:
    print(i)

for i in range(len(tup)):
    print(i, tup[i])

Set 遍历

s = {4, 2, 3, 1, 5}
for i in s:
    print(i)

Dict 遍历

data = {"username": "HelloWorld", "age": 22, "role": "student"}

# 直接遍历字典获取值，根据键取值
for key in data:
    print(key, data[key])

# 利用items方法获取键值，速度很慢，尽量不用
for key, value in data.items():
    print(key, value)

# 利用keys获取键，根据键取值
for key in data.keys():
    print(key, data[key])

# 利用values获取值，但是无法获取对应的键
for value in data.values():
    print(value)

Reference

https://www.runoob.com/python3/python3-list.html

https://www.runoob.com/python3/python3-tuple.html

https://www.runoob.com/python3/python3-set.html

https://www.runoob.com/python3/python3-dictionary.html