code: def get_entry(journal_location, date):
      
      if not isinstance(date, datetime.date):
          return None
      try:
          with open(build_journal_path(journal_location, date), "r") as entry_file:
              return entry_file.read()
      except IOError:
          return None
docs: args
      date - date object
      returns entry text or None if entry doesn't exist