Python – Write 2 lists in 2 columns of a CSV file in python

Let’s say I have 2 lists

a = [1,2,3] 
b = [4,5,6]

I

want to write them in two columns of the CSV file, so when I open the Excel sheet, I see something like this:

col1              col2

1                  4

2                  5

3                  6

What should I do?

I used zip(a,b) but the result is stored in one column:

col1 

1 4

2 5

3 6

The use of pandas is very simple. Just:

import pandas as pd

And then:

In [13]: df = pd. DataFrame({'col1':a, 'col2':b})

In [14]: df
Out[14]: 
   col1  col2
0     1     4
1     2     5
2     3     6

In [15]: df.to_csv('numbers.csv', index=False)

Basically, you’re building a data frame with a list and then saving it back to the .csv. Hope this helps.