CODE EXAMPLE FOR PYTHON

Change one value based on another value in pandas

df.loc[df.ID == 103, ['FirstName', 'LastName']] = 'Matt', 'Jones'
//or
import pandas
df = pandas.read_csv("test.csv")
df.loc[df.ID == 103, 'FirstName'] = "Matt"
df.loc[df.ID == 103, 'LastName'] = "Jones"