Pandas - convert data

def convert(text):

    # don't convert if it is not string
    if not isinstance(text, str):
        return text

    # don't convert if it is not string
    if 'S[' not in text:
        return text

    text = text.split('S[')[1] # split on S[
    #print('string:', text)

    text = text[:-1] # remove ] at the end
    #print('string:', text)

    parts = text.split(',') # split on ,
    #print('list:', parts)

    parts = [x.split('}')[1] for x in parts] # split on } to remove {...}
    #print('list:', parts)

    return parts

# -------------------

data = '''Product code,Options
COWZGH,"{272}Size: S[{854}Newborn (2.5-6kg),{855}Big Baby (6-9kg)]"
PHBC,
ORGWBT0,"{14}Size: S[{49}Newborn (2.5-6kg),{50}Big Baby (6-9kg),{51}Preemie (1.5-2.5kg)]"
COVWDBC,"{270}Size: S[{850}Newborn (2.5-6kg),{851}Big Baby (6-9kg)]"
COVWMV,"{271}Size: S[{852}Newborn (2.5-6kg),{853}Big Baby (6-9kg)]"
BZ-168,
ORWNG,"{200}Size: S[{662}Newborn (2.5-6kg),{663}Big Baby (6-9kg)]"
ORWNB13,"{199}Size: S[{660}Newborn (2.5-6kg),{661}Big Baby (6-9kg)]"
HBCDTG,'''

import io
import pandas as pd

file_like_object = io.StringIO(data)

df = pd.read_csv(file_like_object)

print('\n--- before ---\n')
print(df)

df['Options'] = df['Options'].apply(convert)

print('\n--- after ---\n')
print(df)