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Reference library

Files & data

Read and write files safely; parse JSON, CSV, and common text formats.

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Files & data easy

Convert CSV Files to JSON in Python

Convert a CSV file to a JSON file using Python's built-in csv and json modules.

csv json conversion
Python
import csv
import json

def csv_to_json(csv_filepath, json_filepath):
    """Convert a CSV file to a JSON file."""
    with open(csv_filepath, mode='r', newline='') as csv_file:
        reader = csv.DictReader(csv_file)
        data = [row for row in reader]

    with open(json_filepath, mode='w') as json_file:
      …
2 0 Open
Files & data medium

Convert Image to ASCII Art in Python

Convert any image to ASCII art by resizing, converting to grayscale, and mapping pixel brightness to characters using Pillow.

image ascii-art pillow
Python
from PIL import Image
import sys

ASCII_CHARS = "@%#*+=-:. "

def resize_image(image, new_width=100):
    """Resize image maintaining aspect ratio."""
    width, height = image.size
    ratio = height / width
    new_height = int(new_width * ratio * 0.55)  # 0.55 adjusts for font aspect ratio
    return image.resize((…
2 0 Open
Files & data easy

How to Convert Images Between Formats in Python

Use the Pillow library to open an image from one file format and save it to another, with error handling for missing files or conversion issues.

pillow image conversion file i/o
Python
from PIL import Image
import sys

def convert_image_format(input_path, output_path):
    try:
        img = Image.open(input_path)
        img.save(output_path)
        print(f"Converted {input_path} to {output_path}")
    except FileNotFoundError:
        print(f"Error: File {input_path} not found")
        sys.exit(…
1 0 Open

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