Вот несколько методов, а также примеры кода, позволяющих заглянуть в прошлое:

1. Использование модуля datetime:

   from datetime import datetime, timedelta
   # Get the current date and time
   current_datetime = datetime.now()
   # Subtract a timedelta to get a past date
   past_datetime = current_datetime - timedelta(days=7)
   print(past_datetime)

2. Использование библиотеки dateutil:

   from dateutil.relativedelta import relativedelta
   from datetime import datetime
   # Get the current date and time
   current_datetime = datetime.now()
   # Subtract a relativedelta to get a past date
   past_datetime = current_datetime - relativedelta(days=7)
   print(past_datetime)

3. Использование модуля календаря:

   import calendar
   from datetime import datetime, timedelta
   # Get the current date and time
   current_datetime = datetime.now()
   # Subtract a timedelta to get a past date
   past_datetime = current_datetime - timedelta(days=7)
   # Extract the year, month, and day from the past datetime
   year = past_datetime.year
   month = past_datetime.month
   day = past_datetime.day
   # Get the day of the week for the past date
   day_of_week = calendar.day_name[past_datetime.weekday()]
   print(f"The past date is {year}-{month}-{day} ({day_of_week})")

4. Использование библиотеки стрелок:

   import arrow
   # Get the current date and time
   current_datetime = arrow.now()
   # Subtract a week to get a past date
   past_datetime = current_datetime.shift(weeks=-1)
   print(past_datetime)