【Python】timedeltaオブジェクトの活用事例20選

import datetime

# 3日間の時間差
three_days = datetime.timedelta(days=3)
print(three_days)  # 3 days, 0:00:00

# 1時間30分の時間差
one_hour_thirty_minutes = datetime.timedelta(hours=1, minutes=30)
print(one_hour_thirty_minutes)  # 1:30:00

import datetime

delta = datetime.timedelta(days=1, hours=12, minutes=30)
print(delta.days)        # 1
print(delta.seconds)     # 45000 (12時間30分を秒に変換)
print(delta.microseconds)  # 0

import datetime

delta = datetime.timedelta(days=1, hours=12)
total_seconds = delta.total_seconds()
print(total_seconds)  # 129600.0

import datetime

delta1 = datetime.timedelta(days=1)
delta2 = datetime.timedelta(hours=12)
delta3 = delta1 + delta2
print(delta3)  # 1 day, 12:00:00

delta4 = delta1 - delta2
print(delta4)  # 0:12:00

import datetime

delta = datetime.timedelta(days=1)
double_delta = delta * 2
print(double_delta)  # 2 days, 0:00:00

half_delta = delta / 2
print(half_delta)  # 12:00:00

import datetime

today = datetime.date.today()
tomorrow = today + datetime.timedelta(days=1)
print(tomorrow)

one_week_ago = today - datetime.timedelta(weeks=1)
print(one_week_ago)

import datetime

now = datetime.datetime.now()
three_hours_later = now + datetime.timedelta(hours=3)
print(three_hours_later)

import datetime

date1 = datetime.date(2024, 12, 1)
date2 = datetime.date(2024, 12, 25)
days_between = date2 - date1
print(days_between.days)  # 24

import datetime

datetime1 = datetime.datetime(2024, 12, 1, 10, 0, 0)
datetime2 = datetime.datetime(2024, 12, 1, 12, 30, 0)
time_difference = datetime2 - datetime1
print(time_difference)  # 2:30:00

import datetime

def get_last_day_of_month(year, month):
  """
  特定の月の月末日を求める関数

  Args:
    year: 年
    month: 月

  Returns:
    月末日 (dateオブジェクト)
  """
  if month == 12:
    next_month = datetime.date(year + 1, 1, 1)
  else:
    next_month = datetime.date(year, month + 1, 1)
  last_day = next_month - datetime.timedelta(days=1)
  return last_day

last_day_of_december = get_last_day_of_month(2024, 12)
print(last_day_of_december)  # 2024-12-31

import datetime

def get_business_day_after(date1, n):
  """
  特定の日付からn営業日後の日付を求める関数 (土日を除く)

  Args:
    date1: 日付 (dateオブジェクト)
    n: 営業日数

  Returns:
    日付 (dateオブジェクト)
  """
  current_date = date1
  business_days_counted = 0
  while business_days_counted < n:
    current_date += datetime.timedelta(days=1)
    # 土日を除く
    if current_date.weekday() < 5:
      business_days_counted += 1
  return current_date

# 2024年12月18日から5営業日後の日付を求める
business_day_after = get_business_day_after(datetime.date(2024, 12, 18), 5)
print(business_day_after)  # 2024-12-24

import datetime

def is_within_time_range(start_time, end_time):
  """
  現在時刻がstart_timeからend_timeの間かどうかを判定する関数

  Args:
    start_time: 開始時刻 (timeオブジェクト)
    end_time: 終了時刻 (timeオブジェクト)

  Returns:
    時間帯内ならTrue、そうでなければFalse
  """
  now = datetime.datetime.now().time()
  start_datetime = datetime.datetime.combine(datetime.date.today(), start_time)
  end_datetime = datetime.datetime.combine(datetime.date.today(), end_time)
  now_datetime = datetime.datetime.combine(datetime.date.today(), now)
  if start_datetime < end_datetime:
    return start_datetime <= now_datetime < end_datetime
  else:  # 日をまたいでいる場合
    return start_datetime <= now_datetime or now_datetime < end_datetime

# 午前9時から午後5時までの間かどうかを判定
if is_within_time_range(datetime.time(9, 0), datetime.time(17, 0)):
  print("営業時間内です")
else:
  print("営業時間外です")

import datetime

# 東京のタイムゾーン
tokyo_tz = datetime.timezone(datetime.timedelta(hours=9))

# 東京の現在日時
now_tokyo = datetime.datetime.now(tokyo_tz)

# 3時間後のロンドン時間 (UTC)
london_time = now_tokyo + datetime.timedelta(hours=3)
london_time_utc = london_time.astimezone(datetime.timezone.utc)
print(london_time_utc)

import datetime

# 毎週月曜日に発生するイベント
event_interval = datetime.timedelta(weeks=1)
last_event_date = datetime.datetime(2024, 12, 9, 10, 0, 0)  # 最後のイベント発生日時

# 次回イベント発生日時を計算
next_event_date = last_event_date + event_interval
print(next_event_date)  # 2024-12-16 10:00:00

import datetime

issue_date = datetime.datetime.now()
expiry_days = 30
expiry_date = issue_date + datetime.timedelta(days=expiry_days)
print(f"クーポンの有効期限は{expiry_date}です")

import datetime

departure_time = datetime.datetime(2024, 12, 15, 10, 0, 0)
arrival_time = datetime.datetime(2024, 12, 15, 13, 30, 0)
flight_time = arrival_time - departure_time
print(f"フライト時間は{flight_time}です")  # 3:30:00

import datetime

birth_date = datetime.date(1990, 1, 1)
today = datetime.date.today()
age_delta = today - birth_date
age_years = age_delta.days // 365
print(f"年齢は{age_years}歳です")

import datetime

sleep_time = datetime.datetime(2024, 12, 14, 23, 0, 0)
wake_up_time = datetime.datetime(2024, 12, 15, 7, 0, 0)
sleep_duration = wake_up_time - sleep_time
print(f"睡眠時間は{sleep_duration}です")  # 8:00:00

import datetime

order_date = datetime.date.today()
delivery_days = 3
estimated_delivery_date = order_date + datetime.timedelta(days=delivery_days)
print(f"配達予定日は{estimated_delivery_date}です")

import datetime
import time

start_time = datetime.datetime.now()

# 実験処理

time.sleep(5)  # 5秒間の処理を想定

end_time = datetime.datetime.now()
elapsed_time = end_time - start_time
print(f"実験経過時間: {elapsed_time}")