Examples
Dataframe to csv:

import numpy as np
import pandas as pd

df = pd.DataFrame({'name': ['Leonardo', 'Michelangelo'],
                   'mask': ['blue', 'orange'],
                   'weapon': ['katana', 'nunchaku']})
df.to_csv(index=False)

'name,mask,weapon\r\nLeonardo,blue,katana\r\nMichelangelo,orange,nunchaku\r\n'