检查Python中的字符串是大写,小写还是大小写混合

Question

我想在Python中对字符串列表进行分类,具体取决于它们是大写,小写还是混合大小写

我怎样才能做到这一点？

Answer 1

字符串上有许多"is methods".islower()并isupper()应满足您的需求:

>>> 'hello'.islower()
True

>>> [m for m in dir(str) if m.startswith('is')]
['isalnum', 'isalpha', 'isdigit', 'islower', 'isspace', 'istitle', 'isupper']

以下是如何使用这些方法对字符串列表进行分类的示例:

>>> words = ['The', 'quick', 'BROWN', 'Fox', 'jumped', 'OVER', 'the', 'Lazy', 'DOG']
>>> [word for word in words if word.islower()]
['quick', 'jumped', 'the']
>>> [word for word in words if word.isupper()]
['BROWN', 'OVER', 'DOG']
>>> [word for word in words if not word.islower() and not word.isupper()]
['The', 'Fox', 'Lazy']