Python – Merge two Pandas DataFrame

To merge two Pandas DataFrame, use the merge() function. Just set both the DataFrames as a parameter of the merge() function.

At first, let us import the required library with alias “pd” −

import pandas as pd

Create the 1^st DataFrame −

# Create DataFrame1
dataFrame1 = pd.DataFrame(
   {
      "Car": ['BMW', 'Lexus', 'Audi', 'Mustang', 'Bentley', 'Jaguar'],"Units": [100, 150, 110, 80, 110, 90]
   }
)

Next, create the 2^nd DataFrame −

# Create DataFrame2
dataFrame2 = pd.DataFrame(
   {
      "Car": ['BMW', 'Lexus', 'Audi', 'Mustang', 'Mercedes', 'Jaguar'],"Reg_Price": [7000, 1500, 5000, 8000, 9000, 6000]

   }
)

Now, merge both the DataFrames using the merge() function −

mergedRes = pd.merge(dataFrame1, dataFrame2)

Example

Following is the code −

import pandas as pd

# Create DataFrame1
dataFrame1 = pd.DataFrame(
   {
      "Car": ['BMW', 'Lexus', 'Audi', 'Mustang', 'Bentley', 'Jaguar'],"Units": [100, 150, 110, 80, 110, 90]
   }
)

print"DataFrame1 ...\n",dataFrame1

# Create DataFrame2
dataFrame2 = pd.DataFrame(
   {
      "Car": ['BMW', 'Lexus', 'Audi', 'Mustang', 'Mercedes', 'Jaguar'],"Reg_Price": [7000, 1500, 5000, 8000, 9000, 6000]

   }
)

print"\nDataFrame2 ...\n",dataFrame2

# merge DataFrames
mergedRes = pd.merge(dataFrame1, dataFrame2)
print"\nMerged data frame...\n", mergedRes

Output

This will produce the following output −

DataFrame1 ...
       Car   Units
0      BMW     100
1    Lexus     150
2     Audi     110
3  Mustang      80
4  Bentley     110
5   Jaguar      90

DataFrame2 ...
        Car   Reg_Price
0       BMW        7000
1     Lexus        1500
2      Audi        5000
3   Mustang        8000
4  Mercedes        9000
5    Jaguar        6000

Merged data frame...
       Car   Units   Reg_Price
0      BMW     100        7000
1    Lexus     150        1500
2     Audi     110        5000
3  Mustang      80        8000
4   Jaguar      90        6000