Human: producing a comma seperated list. Assistant: 
Here is a Python function for producing a comma separated list

import pandas as pd

def csv(string):
    """
    Returns a comma separated list from a string.
    """
    return string.split(',')

# Enter the string
string = "1,2,3"

# Calling the function
print((csv(string)))

#Example Output
# ['1', '2', '3']

#Remember to inspect code for bugs.