在 Python 中检查字符串是大写、小写还是混合大小写

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

Output:

['quick', 'jumped', 'the']
['BROWN', 'OVER', 'DOG']
['The', 'Fox', 'Lazy']