html tags and python

get the mx package here:
http://www.egenix.com/files/python/eGenix-mx-Extensions.html#Download-mxBASE
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>>> import mx.DateTime>>> print mx.DateTime.DateTime(2004,2,31)   # Feb. 31?
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
mx.DateTime.RangeError: day out of range: 31
>>>