How to put a dateset containes two different types of data into two different list in python using for loop only?

data for example

10/11/2015,129.177551

how do I build two lists?
Date [] and price [] should contain date and price separately

>Solution :

If you data is in csv, you can use pandas package:

file.csv

10/11/2015,129.177551
10/11/2015,129.177551

import pandas
df = pandas.read_csv('file.csv', header=False)
date = df.iloc[0,:].tolist()
price = df.iloc[1,:].tolist()

Though most people just leave the data in the pandas DataFrame for further processing.

If you data is in a string

data = '''10/11/2015,129.177551
10/11/2015,129.177551'''

data = [line.split(',') for line in data.split('\n')]
date, price = zip(*data)

And if you want to use for loop:

data = '''10/11/2015,129.177551
10/11/2015,129.177551'''

date = []
price = []
for line in data.split('\n'):
    d, p = line.split(',')
    date.append(d)
    price.append(p)

As you can see, method 1 (list comprehension) is much shorter.