Nick Coghlan wrote:
Nick Coghlan wrote:
a) Checking that replacing the relevant "raise TypeError" calls in
Lib/Decimal.py with "return NotImplemented" gives you friendlier
behaviour.
It turns out this isn't really practical - there's too much code in the
module relying on those TypeErrors being raised.
Then again, maybe it's not so bad:
Py> class C:
... def __add__(self, other):
... print "OK!"
... __radd__ = __add__
...
Py> x = decimal.Decimal()
Py> C() + x
OK!
Py> x + C()
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "C:\Python24\lib\decimal.py", line 906, in __add__
other = _convert_other(other)
File "C:\Python24\lib\decimal.py", line 2863, in _convert_other
raise TypeError, "You can interact Decimal only with int, long or Decimal da
ta types."
TypeError: You can interact Decimal only with int, long or Decimal data types.
Py> x = friendly_decimal.Decimal()
Py> C() + x
OK!
Py> x + C()
OK!
Cheers,
Nick.
http://boredomandlaziness.skystorm.net/misc/friendly_decimal.py
--
Nick Coghlan | [EMAIL PROTECTED] | Brisbane, Australia
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http://boredomandlaziness.skystorm.net
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