pandas count missing values per column code example
Example 1: count missing values by column in pandas
df.isna().sum()
Example 2: df count missing values
In [5]: df = pd.DataFrame({'a':[1,2,np.nan], 'b':[np.nan,1,np.nan]})
In [6]: df.isna().sum()
Out[6]:
a 1
b 2
dtype: int64
Example 3: pandas count number missing values
dfObj.isnull().sum().sum()