Created
April 28, 2016 00:18
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| def parse_year_month(year_month): | |
| return year_month.split("-") | |
| def find_teams_that_disappeared_in_month(year_month): | |
| current_year, current_month = parse_year_month(year_month) | |
| if current_month == "01": # O is_january(current_month) | |
| return frozenset() | |
| previous_month = month_before(current_month) | |
| current_teams = teams_in_month(current_month) | |
| previous_teams = teams_in_month(previous_month) | |
| return previous_teams - current_teams | |
| # Si entendi mal y no es cada enero sino 2006-01 es el epoch | |
| def find_teams_that_disappeared_in_month(year_month): | |
| if is_epoch(year_month): # O en su defecto months_since_epoch(year_month) > 0: | |
| return frozenset() | |
| previous_month = month_before(current_month) | |
| current_teams = teams_in_month(current_month) | |
| previous_teams = teams_in_month(previous_month) | |
| return previous_teams - current_teams |
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