CSV Date Sorting and Insertion Utility

This function reads dates from a CSV file, converts them into datetime objects, inserts a new date, sorts them, and writes the sorted dates back into a new CSV file.

Technology Stack : array, bisect, collections, csv, datetime, functools, html, json, math, os, random, re, shutil, subprocess, sys, threading, time

Code Type : Data processing

Code Difficulty : Intermediate

                
                    
def aaaa(arg1, arg2):
    import array
    import bisect
    import collections
    import csv
    import datetime
    import functools
    import html
    import json
    import math
    import os
    import random
    import re
    import shutil
    import subprocess
    import sys
    import threading
    import time

    # Function to create a simple CSV file reader
    def csv_reader(filename):
        with open(filename, 'r') as file:
            reader = csv.reader(file)
            for row in reader:
                yield row

    # Create a list of dates from a CSV file
    def list_dates_from_csv(filename):
        dates = []
        for row in csv_reader(filename):
            try:
                date = datetime.datetime.strptime(row[0], '%Y-%m-%d')
                dates.append(date)
            except ValueError:
                pass
        return dates

    # Find the position to insert a new date in a sorted list of dates
    def insert_date(dates, new_date):
        index = bisect.bisect_left(dates, new_date)
        dates.insert(index, new_date)

    # Create a new CSV file with sorted dates
    def sort_dates_to_csv(input_filename, output_filename):
        dates = list_dates_from_csv(input_filename)
        dates.sort()
        with open(output_filename, 'w', newline='') as file:
            writer = csv.writer(file)
            for date in dates:
                writer.writerow([date.strftime('%Y-%m-%d')])

    # Example usage
    dates = list_dates_from_csv('dates.csv')
    insert_date(dates, datetime.datetime.now())
    sort_dates_to_csv('dates.csv', 'sorted_dates.csv')