I discovered the hard way today that this won't work:

>>> import datetime
>>> d = datetime.timedelta(1)
>>> d / 2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for /: 'datetime.timedelta' and 'int'

The error message is misleading, because in fact timedelta
objects *do* support division by ints, just not with the
/ operator:

>>> d // 2
datetime.timedelta(0, 43200)

Is there some way the error message can be improved,
perhaps by identifying the denominator as effectively
a float?