Python Utility Functions for File Operations and Random Data Generation

These functions demonstrate how to use Python's built-in libraries to perform various tasks, including reading and parsing CSV files, writing data to JSON files, generating random strings, traversing directories to find files with a specific extension, replacing strings in files, and printing the system version.

Technology Stack : csv, json, os, random, re, sys

Code Type : Code collection

Code Difficulty : Intermediate

                
                    
import csv
import json
import os
import random
import re
import sys

def read_and_parse_csv(file_path):
    with open(file_path, mode='r', encoding='utf-8') as file:
        csv_reader = csv.DictReader(file)
        data = [row for row in csv_reader]
    return data

def write_data_to_json(data, output_file_path):
    with open(output_file_path, mode='w', encoding='utf-8') as file:
        json.dump(data, file, ensure_ascii=False, indent=4)

def generate_random_string(length):
    letters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
    return ''.join(random.choice(letters) for i in range(length))

def filter_files_by_extension(directory, extension):
    for root, dirs, files in os.walk(directory):
        for file in files:
            if file.endswith(extension):
                yield os.path.join(root, file)

def replace_substrings_in_file(file_path, old_string, new_string):
    with open(file_path, 'r', encoding='utf-8') as file:
        filedata = file.read()
    with open(file_path, 'w', encoding='utf-8') as file:
        filedata = re.sub(old_string, new_string, filedata)
        file.write(filedata)

def print_system_version():
    print("Python version:", sys.version)
    print("Platform:", sys.platform)