all Python 3calendarexception

calendar.IllegalWeekdayError

exceptions

Raised for a weekday number outside 0–6, for example by setfirstweekday(7); a subclass of ValueError, with the bad number in the weekday attribute.

Syntax

except calendar.IllegalWeekdayError as e: e.weekday

A common cause is the isoweekday() habit where Sunday is 7: here Sunday is 6. Only setfirstweekday() validates the number; the constructors Calendar(7) and TextCalendar(7) raise nothing and silently take the value modulo 7, which is Monday.

Examples

import calendar
try:
    calendar.setfirstweekday(7)
except calendar.IllegalWeekdayError as e:
    print(e.weekday, isinstance(e, ValueError))  # → 7 True

See also

Common errors

Open in the full glossarydocs.python.orgReport an inaccuracy