Converting a Panda DF List into a string

Question

I have a panda data frame. One of the columns contains a list. I want that column to be a single string.

For example my list [\'one\',\'two\',\'three\'] should sim

Answer 1

When you cast col to str with astype, you get a string representation of a python list, brackets and all. You do not need to do that, just apply join directly:

import pandas as pd

df = pd.DataFrame({
    'A': [['a', 'b', 'c'], ['A', 'B', 'C']]
    })

# Out[8]: 
#            A
# 0  [a, b, c]
# 1  [A, B, C]

df['Joined'] = df.A.apply(', '.join)

#            A   Joined
# 0  [a, b, c]  a, b, c
# 1  [A, B, C]  A, B, C