pandas count missing values 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: python count null values in dataframe
df.isnull().sum().sum()
Example 4: getting the number of missing values in pandas
cols_to_delete = df.columns[df.isnull().sum()/len(df) > .90]
df.drop(cols_to_delete, axis = 1, inplace = True)