Retrieve the number of on-this-day events from a given language Wikipedia.

onthisday.py

# Retrieve the number of on-this-day events from a given language Wikipedia,
# iterated over all days of all months of the year.
# usage: onthisday.py [en|de|ru|...]
#
# Dmitry Brant, 2025

import sys
import requests

daysPerMonth = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

def getOnThisDay(language, month, day):
    req = "https://" + language + ".wikipedia.org/api/rest_v1/feed/onthisday/events/" + str(month).zfill(2) + "/" + str(day).zfill(2)
    events = requests.get(req).json()['events']
    return len(events)

language = sys.argv[1]

file = open("onthisday_" + language + ".csv", "w", encoding="utf-8")
for month in range(1, 13):
    for day in range(1, daysPerMonth[month-1] + 1):
        numEvents = getOnThisDay(language, month, day)
        line = str(month) + "\t" + str(day) + "\t" + str(numEvents)
        print(language + ": " + str(month) + "/" + str(day) + ": " + str(numEvents))
        file.write(line + "\n")