human
join with seperator.
assistant
Here is a Python function to join with a seperator

import string

def join(iterable, seperator):
    """Join an iterable with a seperator."""
    return ''.join(iterable)

# Enter the iterable
iterable = ['a', 'b', 'c']

# Calling the function
print((join(iterable, ',')))

#Example Output
# abc

#Remember to inspect code for bugs.