how to see how many nan in column pandas code example

Example 1: find the number of nan per column pandas

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

Example 2: pandas nan values in column

df['your column name'].isnull()