null_cols = df.columns[df.isnull().all()] df.drop(null_cols, axis = 1, inplace = True)
dfObj.isnull().sum()
df = df[df.columns[~df.isnull().all()]]
cols_to_delete = df.columns[df.isnull().sum()/len(df) > .90] df.drop(cols_to_delete, axis = 1, inplace = True)
dfObj.isnull().sum().sum()