Python : Compare CSV files and save the difference with first row(Column Names)

Question

I have two CSV files as shown below:

File 1 : June_01_2018.csv

File 2 : June_02_2018.csv

Note : I want to find the difference between these two file and store it into the third file with the column headers .

My try :

with open('June_01_2018.csv', 'r') as f1:
    file1 = f1.readlines()

with open('June_02_2018.csv', 'r') as f2:
    file2 = f2.readlines()

with open('June_Updates.csv', 'w') as outFile:
    for line in file2:
        if line not in file1:
            outFile.write(line)

But unable to store the column headers into the third file.

Answer 1

try this:

    with open('June_01_2018.csv', 'r') as f1:
        file1 = f1.readlines()

    with open('June_02_2018.csv', 'r') as f2:
        file2 = f2.readlines()

    with open('June_Updates.csv', 'w') as outFile:
        outFile.write(file1[0])
        for line in file2:
            if line not in file1:
                outFile.write(line)