python 遍历字典

以下是Python遍历字典的几种方法：

1.使用for循环遍历字典的键值对

favorite_languages = {'Tom': 'python', 'Jerry': 'c', 'Mickey': 'ruby'}
for name, language in favorite_languages.items():
    print(name + "'s favorite language is " + language)

2.使用for循环遍历字典的键

favorite_languages = {'Tom': 'python', 'Jerry': 'c', 'Mickey': 'ruby'}
for name in favorite_languages.keys():
    print(name)

3.使用for循环遍历字典的值

favorite_languages = {'Tom': 'python', 'Jerry': 'c', 'Mickey': 'ruby'}
for language in favorite_languages.values():
    print(language)

4.使用列表推导式遍历字典的键值对

favorite_languages = {'Tom': 'python', 'Jerry': 'c', 'Mickey': 'ruby'}
print([(name, language) for name, language in favorite_languages.items()])

5.使用列表推导式遍历字典的键

favorite_languages = {'Tom': 'python', 'Jerry': 'c', 'Mickey': 'ruby'}
print([name for name in favorite_languages.keys()])

6.使用列表推导式遍历字典的值

favorite_languages = {'Tom': 'python', 'Jerry': 'c', 'Mickey': 'ruby'}
print([language for language in favorite_languages.values()])

7.使用字典方法items()遍历字典的键值对

favorite_languages = {'Tom': 'python', 'Jerry': 'c', 'Mickey': 'ruby'}
for item in favorite_languages.items():
    print(item)

8.使用字典方法keys()遍历字典的键

favorite_languages = {'Tom': 'python', 'Jerry': 'c', 'Mickey': 'ruby'}
for key in favorite_languages.keys():
    print(key)

9.使用字典方法values()遍历字典的值

favorite_languages = {'Tom': 'python', 'Jerry': 'c', 'Mickey': 'ruby'}
for value in favorite_languages.values():
    print(value)