Answers for "dataframe only these columns"

get columns based on dtype pandas

>>df.select_dtypes(include='object').columns

Index(['C', 'D'], dtype='object')

how to get only certain columns in pandas

#only the column names specified will be put into the new sub df
#enter a minimum of one column name
print(df[['column_name_1', 'column_name_2', ... , 'column_name_n']])