I have a column in a dataframe which contains an array of numbers from 1 to 5 and I have an array containing five words. I would like to find the simplest, most compact and most elegant way in Python to “in place” replace the numbers in the column with the corresponding words. For example:
import pandas as pd # This is the dataframe df = pd.DataFrame({'code': ['A', 'B', 'C', 'D', 'E'], 'color': [4, 1, 2, 5, 1]}) # code color # 0 A 4 # 1 B 1 # 2 C 2 # 3 D 5 # 4 E 1 # This is the array colors = ["blue", "yellow", "red", "white", "black"] # This is what I wish to obtain # code color # 0 A white # 1 B blue # 2 C yellow # 3 D black # 4 E blue
I am certain that the numbers in columns “color” are not NaN or outside range [1,5]. No check is necessary. Any suggestion?
Advertisement
Answer
This should do
df['color'] = df['color'].apply(lambda c: colors[c-1])