python 遍历字典的item ,遍历字典的key 和 value-蒲公英云

python 遍历字典的item ,遍历字典的key 和 value

1 遍历字典子元素

dictionary = {"one": "语文", "two": "数学", "three": "英语", "four": "物理", "five": "化学"}
for key in dictionary.items():
    print(key)

打印结果

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2 单独遍历出key,value 可以使用for in

dictionary = {"one": "语文", "two": "数学", "three": "英语", "four": "物理", "five": "化学"}
# 如果想单独遍历出key,value 可以使用for in
for key, value in dictionary.items():
    # 遍历字典的key
    print(key)
    # 遍历字典的value
    print(value)

打印结果

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3 或者直接使用for in 遍历出key 和value

dictionary = {"one": "语文", "two": "数学", "three": "英语", "four": "物理", "five": "化学"}
for key in dictionary:
    # 遍历字典的key
    print(key)
    # 遍历字典的value
    print(dictionary[key])

打印结果

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4 遍历出 value

dictionary = {"one": "语文", "two": "数学", "three": "英语", "four": "物理", "five": "化学"}
# dictionary.values() 是获取字典的value 所以可以使用它遍历出values 如下
for values in dictionary.values():
    print(values)