conte nan pandas
#Python, pandas
#Count missing values for each column of the dataframe df
df.isnull().sum()
Ahh the negotiatior
#Python, pandas
#Count missing values for each column of the dataframe df
df.isnull().sum()
df['your column name'].isnull()df.groupby(['No', 'Name'], dropna=False, as_index=False).size()df.groupby(['No', 'Name'], dropna=False, as_index=False).size()df.groupby(['No', 'Name'], dropna=False, as_index=False).size()df.groupby(['No', 'Name'], dropna=False, as_index=False).size()