Replace items in column based on list
If you create a dictionary that maps from list1 to list2 then you can use Series.map:
df = pd.read_clipboard()list1 = ['19990506', '19990607', '20000802']list2 = ['1999201', '1999232', '2000252']# When I read in your data I get ints in the Date column# so I need ints in the replacement map, if you have# strings then remove the int() conversionsreplacement_map = {int(i1): int(i2) for i1, i2 in zip(list1, list2)}df['Date'] = df['Date'].map(replacement_map)dfOut[13]: Date Value0 1999201 0.61 1999201 0.82 1999232 1.23 2000252 0.4