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cc773d3b11
as a parameter; this was the only use of the base
constructor or surgical alteration of another object's
data attribute.
This change simplifies the constructor requirements for subclasses.
This relates to SourceForge bug #115928.
79 lines
3 KiB
Python
79 lines
3 KiB
Python
"""A more or less complete user-defined wrapper around list objects."""
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class UserList:
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def __init__(self, initlist=None):
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self.data = []
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if initlist is not None:
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# XXX should this accept an arbitrary sequence?
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if type(initlist) == type(self.data):
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self.data[:] = initlist
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elif isinstance(initlist, UserList):
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self.data[:] = initlist.data[:]
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else:
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self.data = list(initlist)
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def __repr__(self): return repr(self.data)
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def __cmp__(self, other):
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if isinstance(other, UserList):
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return cmp(self.data, other.data)
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else:
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return cmp(self.data, other)
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def __contains__(self, item): return item in self.data
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def __len__(self): return len(self.data)
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def __getitem__(self, i): return self.data[i]
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def __setitem__(self, i, item): self.data[i] = item
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def __delitem__(self, i): del self.data[i]
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def __getslice__(self, i, j):
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i = max(i, 0); j = max(j, 0)
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return self.__class__(self.data[i:j])
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def __setslice__(self, i, j, other):
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i = max(i, 0); j = max(j, 0)
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if isinstance(other, UserList):
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self.data[i:j] = other.data
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elif isinstance(other, type(self.data)):
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self.data[i:j] = other
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else:
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self.data[i:j] = list(other)
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def __delslice__(self, i, j):
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i = max(i, 0); j = max(j, 0)
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del self.data[i:j]
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def __add__(self, other):
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if isinstance(other, UserList):
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return self.__class__(self.data + other.data)
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elif isinstance(other, type(self.data)):
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return self.__class__(self.data + other)
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else:
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return self.__class__(self.data + list(other))
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def __radd__(self, other):
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if isinstance(other, UserList):
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return self.__class__(other.data + self.data)
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elif isinstance(other, type(self.data)):
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return self.__class__(other + self.data)
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else:
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return self.__class__(list(other) + self.data)
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def __iadd__(self, other):
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if isinstance(other, UserList):
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self.data += other.data
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elif isinstance(other, type(self.data)):
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self.data += other
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else:
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self.data += list(other)
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return self
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def __mul__(self, n):
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return self.__class__(self.data*n)
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__rmul__ = __mul__
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def __imul__(self, n):
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self.data *= n
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return self
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def append(self, item): self.data.append(item)
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def insert(self, i, item): self.data.insert(i, item)
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def pop(self, i=-1): return self.data.pop(i)
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def remove(self, item): self.data.remove(item)
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def count(self, item): return self.data.count(item)
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def index(self, item): return self.data.index(item)
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def reverse(self): self.data.reverse()
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def sort(self, *args): apply(self.data.sort, args)
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def extend(self, other):
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if isinstance(other, UserList):
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self.data.extend(other.data)
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else:
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self.data.extend(other)
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