Writing data from a Python List to CSV row-wise Last Updated : 12 Jul, 2025 Comments Improve Suggest changes 5 Likes Like Report Comma Separated Values (CSV) files a type of a plain text document in which tabular information is structured using a particular format. A CSV file is a bounded text format which uses a comma to separate values. The most common method to write data from a list to CSV file is the writerow() method of writer and DictWriter class. Example 1: Creating a CSV file and writing data row-wise into it using writer class. Python3 # Importing library import csv # data to be written row-wise in csv file data = [['Geeks'], [4], ['geeks !']] # opening the csv file in 'w+' mode file = open('g4g.csv', 'w+', newline ='') # writing the data into the file with file: write = csv.writer(file) write.writerows(data) Output: Example 2: Writing data row-wise into an existing CSV file using DictWriter class. Python3 # importing library import csv # opening the csv file in 'w' mode file = open('g4g.csv', 'w', newline ='') with file: # identifying header header = ['Organization', 'Established', 'CEO'] writer = csv.DictWriter(file, fieldnames = header) # writing data row-wise into the csv file writer.writeheader() writer.writerow({'Organization' : 'Google', 'Established': '1998', 'CEO': 'Sundar Pichai'}) writer.writerow({'Organization' : 'Microsoft', 'Established': '1975', 'CEO': 'Satya Nadella'}) writer.writerow({'Organization' : 'Nokia', 'Established': '1865', 'CEO': 'Rajeev Suri'}) Output: Example 3: Appending data row-wise into an existing CSV file using writer class. Python3 # Importing library import csv # data to be written row-wise in csv file data = [['Geeks for Geeks', '2008', 'Sandeep Jain'], ['HackerRank', '2009', 'Vivek Ravisankar']] # opening the csv file in 'a+' mode file = open('g4g.csv', 'a+', newline ='') # writing the data into the file with file: write = csv.writer(file) write.writerows(data) Output: Create Quiz Comment R riturajsaha Follow 5 Improve R riturajsaha Follow 5 Improve Article Tags : Python python-csv Explore Python FundamentalsPython Introduction 2 min read Input and Output in Python 4 min read Python Variables 4 min read Python Operators 4 min read Python Keywords 2 min read Python Data Types 8 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 5 min read Python Functions 5 min read Recursion in Python 4 min read Python Lambda Functions 5 min read Python Data StructuresPython String 5 min read Python Lists 4 min read Python Tuples 4 min read Python Dictionary 3 min read Python Sets 6 min read Python Arrays 7 min read List Comprehension in Python 4 min read Advanced PythonPython OOP Concepts 11 min read Python Exception Handling 5 min read File Handling in Python 4 min read Python Database Tutorial 4 min read Python MongoDB Tutorial 3 min read Python MySQL 9 min read Python Packages 10 min read Python Modules 3 min read Python DSA Libraries 15 min read List of Python GUI Library and Packages 3 min read Data Science with PythonNumPy Tutorial - Python Library 3 min read Pandas Tutorial 4 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 3 min read StatsModel Library - Tutorial 3 min read Learning Model Building in Scikit-learn 6 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 6 min read Web Development with PythonFlask Tutorial 8 min read Django Tutorial | Learn Django Framework 7 min read Django ORM - Inserting, Updating & Deleting Data 4 min read Templating With Jinja2 in Flask 6 min read Django Templates 5 min read Build a REST API using Flask - Python 3 min read Building a Simple API with Django REST Framework 3 min read Python PracticePython Quiz 1 min read Python Coding Practice 1 min read Python Interview Questions and Answers 15+ min read Like