How do I add data to a column in a CSV file in Python?

How do I add a column to an existing csv file in Python?

Steps will be to append a column in csv file are,1Open 'input.csv' file in read mode and create csv.reader object for this csv file.2Open 'output.csv' file in write mode and create csv.writer object for this csv file.3Using reader object, read the 'input.csv' file line by line. ... 4Close both input.

How do I add values to a csv file?

There are several steps to take that.1Import writer class from csv module.2Open your existing CSV file in append mode. Create a file object for this file.3Pass this file object to csv. writer() and get a writer object.4Pass the list as an argument into the writerow() function of the writer object. ... 5Close the file object.

How do you manipulate data in a CSV file in Python?

CSV files can be handled in multiple ways in Python.1Import the csv library. import csv.2Open the CSV file. The . ... 3Use the csv.reader object to read the CSV file. csvreader = csv.reader(file)4Extract the field names. Create an empty list called header. ... 5Extract the rows/records. ... 6Close the file.

How do I write to column wise in a csv file in Python?

How to write a CSV file by column in Python1list_1 = ["Hello", "World", "Monty", "Python"]2list_2 = [1, 2, 3, 4]3file = open("columns.txt", "w")4writer = csv. writer(file)5for w in range(4): iterate through integers 0-3.6writer. writerow([list_1[w], list_2[w]])7file. close()