diff options
Diffstat (limited to 'Lib/_strptime.py')
| -rw-r--r-- | Lib/_strptime.py | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/Lib/_strptime.py b/Lib/_strptime.py index 1a6e8a8..a6b54f3 100644 --- a/Lib/_strptime.py +++ b/Lib/_strptime.py @@ -391,25 +391,27 @@ def strptime(data_string, format="%a %b %d %H:%M:%S %Y"): # If we know the week of the year and what day of that week, we can figure # out the Julian day of the year # Calculations below assume 0 is a Monday - if julian == -1 and week_of_year != -1 and weekday != -1 and year != -1: - # Adjust for U directive so that calculations are not dependent on - # directive used to figure out week of year - if weekday == 6 and week_of_year_start == 6: - week_of_year -= 1 - # For some reason when Dec 31 falls on a Monday the week of the year is - # off by a week; verified on both OS X and Solaris. - elif weekday == 0 and week_of_year_start == 6 and week_of_year >= 52: - week_of_year += 1 + if julian == -1 and week_of_year != -1 and weekday != -1: # Calculate how many days in week 0 first_weekday = datetime_date(year, 1, 1).weekday() preceeding_days = 7 - first_weekday if preceeding_days == 7: preceeding_days = 0 + # Adjust for U directive so that calculations are not dependent on + # directive used to figure out week of year + if weekday == 6 and week_of_year_start == 6: + week_of_year -= 1 + # If a year starts and ends on a Monday but a week is specified to + # start on a Sunday we need to up the week to counter-balance the fact + # that with %W that first Monday starts week 1 while with %U that is + # week 0 and thus shifts everything by a week + if weekday == 0 and first_weekday == 0 and week_of_year_start == 6: + week_of_year += 1 # If in week 0, then just figure out how many days from Jan 1 to day of # week specified, else calculate by multiplying week of year by 7, # adding in days in week 0, and the number of days from Monday to the # day of the week - if not week_of_year: + if week_of_year == 0: julian = 1 + weekday - first_weekday else: days_to_week = preceeding_days + (7 * (week_of_year - 1)) |