Počet na hodnoty v konkrétnych stĺpce v pandy

Príklady kódu

2
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zistiť počet nan na stĺpec pandy

In [1]: s = pd.Series([1,2,3, np.nan, np.nan])

In [4]: s.isna().sum()   # or s.isnull().sum() for older pandas versions
Out[4]: 2

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