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Objects representing a week
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Clean up Travis config

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test_isoweek.py

README.rst

ISO Week

The isoweek module provide the class Week. Instances represent specific weeks spanning Monday to Sunday. There are 52 or 53 numbered weeks in a year. Week 1 is defined to be the first week with 4 or more days in January.

It's called isoweek because this is the week definition of ISO 8601. This standard also define a notation for identifying weeks; YYYYWww (where the "W" is a literal). An example is "2011W08" which denotes the 8th week of year 2011. Week instances stringify to this form.

See also http://en.wikipedia.org/wiki/ISO_week_date

The Week instances are light weight and immutable with an interface similar to the datetime.date objects. Example code:

from isoweek import Week
w = Week(2011, 20)
print "Week %s starts on %s" % (w, w.monday())

print "Current week number is", Week.thisweek().week
print "Next week is", Week.thisweek() + 1

Reference

Constructor:

class isoweek.Week(year, week)

All arguments are required. Arguments should be ints.

If the week number isn't within the range of the given year, the year is adjusted to make week number within range. The final year must be within range 1 to 9999. If not ValueError is raised.

Other constructors, all class methods:

classmethod Week.thisweek()
Return the current week (local time).
classmethod Week.fromordinal(ordinal)
Return the week corresponding to the proleptic Gregorian ordinal, where January 1 of year 1 starts the week with ordinal 1.
classmethod Week.fromstring(isostring)
Return a week initialized from an ISO formatted string like "2011W08" or "2011-W08". Note that weeks always stringify back in the former and more compact format.
classmethod Week.withdate(date)
Return the week that contains the given datetime.date.
classmethod Week.weeks_of_year(year)
Returns an iterator over the weeks of the given year.
classmethod Week.last_week_of_year(year)
Returns the last week of the given year.

Instance attributes (read-only):

Week.year
Between 1 and 9999 inclusive.
Week.week
Between 1 and 53 inclusive (52 for most years).

Supported operations:

Operation Result
week1 = week2 + int week2 is int weeks removed from week1.
week1 = week2 - int Computes week2 such that week2 + int == week1
int = week1 - week2 Computes int such that week2 + int == week1
week1 < week2 week1 is considered less than week2 when week1 precedes week2 in time.

Instance methods:

Week.replace(year, week)
Return a Week with the same value, except for those parameters given new values by whichever keyword arguments are specified.
Week.toordinal()
Return the proleptic Gregorian ordinal the week, where January 1 of year 1 starts the first week.
Week.day(num)
Return the given day of week as a datetime.date object. Day 0 is Monday.
Week.monday(), Week.tuesday(),.. Week.sunday()
Return the given day of week as a datetime.date object.
Week.days()
Returns the 7 days of the week as a list.
Week.contains(day)
Check if the given datetime.date falls within the week.
Week.isoformat()
Return a string representing the week in ISO 8610 format, "YYYYWww". For example Week(2011, 8).isoformat() == '2011W08'.
Week.__str__()
For a Week w, str(w) is equivalent to w.isoformat()
Week.__repr__()
Return a string like "isoweek.Week(2011, 2)".
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