counting null values in pandas code example
Example 1: count nan pandas
#Python, pandas
#Count missing values for each column of the dataframe df
df.isnull().sum()
Example 2: python count null values in dataframe
# Count total missing values in a dataframe
df.isnull().sum().sum()
# Gives a integer value
Example 3: 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 4: how to count null values in pandas and return as percentage
percent_missing = df.isnull().sum() * 100 / len(df)