[issue14423] Getting the starting date of iso week from a week number and a year.

[Esben Agerbæk Black]

Esben Agerbæk Black <esbenab at gmail.com> added the comment:

I believe that it is a good solution to have, for lack of a better term;
bi-directional features so
in my opinion .isocalendar()  merits having a constructor that takes an ISO
format.

Sadly no :-(
I looked it over once more and it seems there is an error where the date is
not offset correctly
for years beginning on Tuesday, Wednesday or Thursday.
I will updater my patch ASAP.

+        if self.isocalendar()[1] != 1:
+            if self.weekday() > 3:  # Jan 1 is not in week one

+                 self += timedelta(7 - self.weekday())

+        else:

+            self -= timedelta(self.weekday())

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