Merge two dataframes together in Pandas

Import modules

import pandas as pd

 

Create some dummy data

raw_data1 = {'name': ['Willard Morris', 'Al Jennings', 'Omar Mullins', 'Spencer McDaniel'],
'age': [20, 19, 22, 21],
'favorite_color': ['blue', 'blue', 'yellow', "green"],
'test_one': [88, 92, 95, 70]}
df1 = pd.DataFrame(raw_data1)
df1

	age	favorite_color	name	test_one
0	20	blue	Willard Morris	88
1	19	blue	Al Jennings	92
2	22	yellow	Omar Mullins	95
3	21	green	Spencer McDaniel	70

raw_data2 = {'name': ['Willard Morris', 'Al Jennings', 'Omar Mullins', 'Spencer McDaniel'],
'test_two': [87, 94, 97, 72],
'test_three': [78, 100, 90, 85]}
df2 = pd.DataFrame(raw_data2)
df2

	name	test_three	test_two
0	Willard Morris	78	87
1	Al Jennings	100	94
2	Omar Mullins	90	97
3	Spencer McDaniel	85	72

 

Merge the two dataframes, using 'name' as the join key

df3 = df1.merge(df2, how='left', on="name")
df3.head()

	age	favorite_color	name	test_one	test_three	test_two
0	20	blue	Willard Morris	88	78	87
1	19	blue	Al Jennings	92	100	94
2	22	yellow	Omar Mullins	95	90	97
3	21	green	Spencer McDaniel	70	85	72