Python: Parse a given CSV string and get the list of lists of string values

Last update on April 02 2025 12:32:13 (UTC/GMT +8 hours)

3. CSV String Parser

Write a Python program to parse a given CSV string and get a list of lists of string values. Use csv.reader

We will get a list of lists of string values after parsing a CSV formatted string where each list of strings represents a line. For example "x, y, z" will become [["x", "y", "z"]].

Sample Solution:

Python Code:

import csv
csv_string = """1,2,3
4,5,6
7,8,9
"""
print("Original string:")
print(csv_string)
lines = csv_string.splitlines()
print("List of CSV formatted strings:")
print(lines)
reader = csv.reader(lines)
parsed_csv = list(reader)
print("\nList representation of the CSV file:")
print(parsed_csv)

Sample Output:

Original string:
1,2,3
4,5,6
7,8,9

List of CSV formatted strings:
['1,2,3', '4,5,6', '7,8,9']

List representation of the CSV file:
[['1', '2', '3'], ['4', '5', '6'], ['7', '8', '9']]

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to parse a multiline CSV string using csv.reader and output the result as a list of lists.
• Write a Python function that takes a CSV formatted string with custom delimiters and returns a nested list of strings using csv.reader.
• Write a Python script to convert a CSV string with quoted fields into a list of lists, then print each sublist.
• Write a Python program to parse a CSV string containing newline characters within quoted fields and display the resulting list of lists.

Python Code Editor:

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