擅长:python、mysql、java
<p>两者的文档完全相同</p>
<p>pandas.isna():<a href="https://pandas.pydata.org/pandas-docs/stable/generated/pandas.isna.html#pandas.isna" rel="noreferrer">https://pandas.pydata.org/pandas-docs/stable/generated/pandas.isna.html#pandas.isna</a></p>
<p>pandas.isnull():<a href="https://pandas.pydata.org/pandas-docs/stable/generated/pandas.isnull.html#pandas.isnull" rel="noreferrer">https://pandas.pydata.org/pandas-docs/stable/generated/pandas.isnull.html#pandas.isnull</a></p>
<p>在这里,它甚至说DataFrame.isnull是isna的别名,请参见第节</p>
<p>pandas.DataFrame.isnull():<a href="https://pandas-docs.github.io/pandas-docs-travis/generated/pandas.DataFrame.isnull.html#pandas.DataFrame.isnull" rel="noreferrer">https://pandas-docs.github.io/pandas-docs-travis/generated/pandas.DataFrame.isnull.html#pandas.DataFrame.isnull</a></p>
<p>因此,它们必须是相同的东西,像np.nan,np.nan,np.nan</p>