code: def _ssweek_num_weeks(ssweek_year):
      "Get the number of Sundaystarting-weeks in this year"
      year_start = _ssweek_year_start(ssweek_year)
      next_year_start = _ssweek_year_start(ssweek_year+1)
      year_num_weeks = ((next_year_start - year_start).days) // 7
      return year_num_weekf _ssweek_num_weeks(ssweek_year):
      "Get the number of Sundaystarting-weeks in this year"
      year_start = _ssweek_year_start(ssweek_year)
      next_year_start = _ssweek_year_start(ssweek_year+1)
      year_num_weeks = ((next_year_start - year_start).days) // 7
      return year_num_weeks
docs: Get the number of Sundaystarting-weeks in this year