Categorial to Numerical

import numpy as np
import pandas as pd
data = {
    'sam' : ['archery', 'badminton', 'athletics', 'cycling_road', 'canoe_sprint', 'boxing'],
    'medal' : ['gold', 'silver', 'bronze', 'gold', 'gold', 'silver']
}
df = pd.DataFrame(data)
df
sam medal
0 archery gold
1 badminton silver
2 athletics bronze
3 cycling_road gold
4 canoe_sprint gold
5 boxing silver 
def get_medal_points(medal):
    if(medal == 'gold'):
        return 10
    
    if(medal == 'silver'):
        return 5
    
    if(medal == 'bronze'):
        return 1
    
    return 0
df['medal_points'] = df['medal'].apply(get_medal_points)
df
sam medal medal_points
0 archery gold 10
1 badminton silver 5
2 athletics bronze 1
3 cycling_road gold 10
4 canoe_sprint gold 10
5 boxing silver 5