Add support for negative indices in UserString.MutableString.__setitem__
and UserString.MutableString.__delitem__.
diff --git a/Lib/UserString.py b/Lib/UserString.py
index e8e0fed..3251139 100755
--- a/Lib/UserString.py
+++ b/Lib/UserString.py
@@ -146,9 +146,13 @@
def __hash__(self):
raise TypeError, "unhashable type (it is mutable)"
def __setitem__(self, index, sub):
+ if index < 0:
+ index += len(self.data)
if index < 0 or index >= len(self.data): raise IndexError
self.data = self.data[:index] + sub + self.data[index+1:]
def __delitem__(self, index):
+ if index < 0:
+ index += len(self.data)
if index < 0 or index >= len(self.data): raise IndexError
self.data = self.data[:index] + self.data[index+1:]
def __setslice__(self, start, end, sub):