Day03.md

Day 3: Working with Different File Types and Advanced Operations

Introduction

Working with CSV Files:

import csv

# Writing to a CSV file
with open('example.csv', 'w', newline='') as file:
    writer = csv.writer(file)
    writer.writerow(["Name", "Age"])
    writer.writerow(["Alice", 30])
    writer.writerow(["Bob", 25])

# Reading from a CSV file
with open('example.csv', 'r') as file:
    reader = csv.reader(file)
    for row in reader:
        print(row)

Working with JSON Files:

import json

# Writing to a JSON file
data = {"name": "Alice", "age": 30, "city": "New York"}
with open('example.json', 'w') as file:
    json.dump(data, file)

# Reading from a JSON file
with open('example.json', 'r') as file:
    data = json.load(file)
    print(data)

File and Directory Management:

import os

# Listing files in a directory
files = os.listdir('.')
print(files)

# Renaming a file
os.rename('old_name.txt', 'new_name.txt')

# Checking file existence
if os.path.exists('example.txt'):
    print("File exists.")
else:
    print("File does not exist.")

Challenges

Challenge 1: CSV File Handling

Write a script that reads data from a CSV file and prints it in a formatted manner.

Challenge 2: JSON File Handling:

Create a program that reads JSON data from a file, modifies it, and writes it back to the file.

Challenge 3: Directory Operations:

Write a script that lists all files in a directory and identifies which ones are text files.