Examples of writing a csv file in python

write_csv_py

a_list = ['uno, dos', 'tres, cuatro']

for x in a_list:
    out =  "%s\n" % (x)
    # puede que en Windows tengas que hacer lo que sigue
    # out =  "%s\r\n" % (x)    

    with open("outfile1.csv","a") as fo:
        fo.write(out)

# usando csv

import csv

for x in a_list:
    out =   x.split(",")
    with open("outfile2.csv", 'a') as fo:
        writer = csv.writer(fo, delimiter=",")
        writer.writerow(out)

# si tu data está en un dataframe puedes usar

import pandas as pd
df = pd.DataFrame(data={"col1": ['uno', 'tres'], "col2": ['dos', 'cuatro']})
df.to_csv("./outfile3.csv", sep=',',index=False, header=None)