check number of nulls pandas code example

Example 1: 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 2: knowing the sum null values in a specific row in pandas dataframe

note:df is syour dataframe 

print(df['emp_title'].isnull().sum())