format date in RFC 3339 subset (profile) of ISO 8601

[anatoly techtonik <techtonik@…>]

Currently util.datefmt.format_datetime() is able to produce ISO 8601 compliant format given 'iso8601' as argument. The proposal is to increase interoperability by making datetime format compliant with RFC 3339 profile of ISO 8601.

That means that date will still be ISO 8601, but it will be additionally suitable for generating output that uses RFC 3339 based datetime, such as Atom.

See ​rfc:3339#section-5.6

trac/util/datefmt.py

@@ -100 +100 @@
     
     The formatting will be done using the given `format`, which consist
     of conventional `strftime` keys. In addition the format can be 'iso8601'
-    to specify the international date format.
+    to specify the international date format (compliant with rfc3339).
 
     `tzinfo` will default to the local timezone if left to `None`.
     """
@@ -125 +125 @@
     text = t.strftime(format)
     if normalize_Z:
         text = text.replace('+0000', 'Z')
+        text = text[:-2] + ":" + text[-2:]
     encoding = locale.getpreferredencoding() or sys.getdefaultencoding()
     if sys.platform != 'win32' or sys.version_info[:2] > (2, 3):
         encoding = locale.getlocale(locale.LC_TIME)[1] or encoding

[Christian Boos]

Why not, but please fix the patch (only do this substitution if test[-1] != 'Z').