[Python-Dev] Negative indices in UserString.MutableString

Walter Dörwald walter at livinglogic.de
Thu Feb 17 23:22:20 CET 2005

Currently UserString.MutableString does not support negative indices:

>>> import UserString
>>> UserString.MutableString("foo")[-1] = "bar"
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/home/Python-test/dist/src/Lib/UserString.py", line 149, in __setitem__
    if index < 0 or index >= len(self.data): raise IndexError

Should this be fixed so that negative value are treated as being relative to the end?

   Walter Dörwald

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