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Python to judge a dataframe non-empty

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Dataframe has a property of empty, directly with dataframe.empty judgment on the line.
If DF is empty, then Df.empty returns True, and vice versa returns false.
Be careful not to add () after empty.
Learn tips: Check your own version of the pandas corresponding to the official Web download pandas use PDF manual, directly search "empty", you can find some examples of the above problems/answers.

Python to judge a dataframe non-empty

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