numpy中np.nan(pandas中NAN)
时间: 2021-07-24 13:12:03
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import numpy as np np.nan == np.nan False
help(np.nan)
Help on float object: class float(object) | float(x=0, /) | | Convert a string or number to a floating point number, if possible. | print(np.isnan(np.nan)) print(pd.isna(np.nan)) print(pd.isnull(np.nan)) True True True