| 1 | """A more or less complete user-defined wrapper around list objects."""
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| 2 |
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| 3 | import collections
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| 4 |
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| 5 | class UserList(collections.MutableSequence):
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| 6 | def __init__(self, initlist=None):
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| 7 | self.data = []
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| 8 | if initlist is not None:
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| 9 | # XXX should this accept an arbitrary sequence?
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| 10 | if type(initlist) == type(self.data):
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| 11 | self.data[:] = initlist
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| 12 | elif isinstance(initlist, UserList):
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| 13 | self.data[:] = initlist.data[:]
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| 14 | else:
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| 15 | self.data = list(initlist)
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| 16 | def __repr__(self): return repr(self.data)
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| 17 | def __lt__(self, other): return self.data < self.__cast(other)
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| 18 | def __le__(self, other): return self.data <= self.__cast(other)
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| 19 | def __eq__(self, other): return self.data == self.__cast(other)
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| 20 | def __ne__(self, other): return self.data != self.__cast(other)
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| 21 | def __gt__(self, other): return self.data > self.__cast(other)
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| 22 | def __ge__(self, other): return self.data >= self.__cast(other)
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| 23 | def __cast(self, other):
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| 24 | if isinstance(other, UserList): return other.data
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| 25 | else: return other
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| 26 | def __cmp__(self, other):
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| 27 | return cmp(self.data, self.__cast(other))
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| 28 | __hash__ = None # Mutable sequence, so not hashable
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| 29 | def __contains__(self, item): return item in self.data
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| 30 | def __len__(self): return len(self.data)
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| 31 | def __getitem__(self, i): return self.data[i]
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| 32 | def __setitem__(self, i, item): self.data[i] = item
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| 33 | def __delitem__(self, i): del self.data[i]
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| 34 | def __getslice__(self, i, j):
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| 35 | i = max(i, 0); j = max(j, 0)
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| 36 | return self.__class__(self.data[i:j])
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| 37 | def __setslice__(self, i, j, other):
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| 38 | i = max(i, 0); j = max(j, 0)
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| 39 | if isinstance(other, UserList):
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| 40 | self.data[i:j] = other.data
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| 41 | elif isinstance(other, type(self.data)):
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| 42 | self.data[i:j] = other
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| 43 | else:
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| 44 | self.data[i:j] = list(other)
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| 45 | def __delslice__(self, i, j):
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| 46 | i = max(i, 0); j = max(j, 0)
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| 47 | del self.data[i:j]
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| 48 | def __add__(self, other):
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| 49 | if isinstance(other, UserList):
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| 50 | return self.__class__(self.data + other.data)
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| 51 | elif isinstance(other, type(self.data)):
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| 52 | return self.__class__(self.data + other)
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| 53 | else:
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| 54 | return self.__class__(self.data + list(other))
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| 55 | def __radd__(self, other):
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| 56 | if isinstance(other, UserList):
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| 57 | return self.__class__(other.data + self.data)
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| 58 | elif isinstance(other, type(self.data)):
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| 59 | return self.__class__(other + self.data)
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| 60 | else:
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| 61 | return self.__class__(list(other) + self.data)
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| 62 | def __iadd__(self, other):
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| 63 | if isinstance(other, UserList):
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| 64 | self.data += other.data
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| 65 | elif isinstance(other, type(self.data)):
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| 66 | self.data += other
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| 67 | else:
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| 68 | self.data += list(other)
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| 69 | return self
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| 70 | def __mul__(self, n):
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| 71 | return self.__class__(self.data*n)
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| 72 | __rmul__ = __mul__
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| 73 | def __imul__(self, n):
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| 74 | self.data *= n
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| 75 | return self
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| 76 | def append(self, item): self.data.append(item)
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| 77 | def insert(self, i, item): self.data.insert(i, item)
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| 78 | def pop(self, i=-1): return self.data.pop(i)
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| 79 | def remove(self, item): self.data.remove(item)
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| 80 | def count(self, item): return self.data.count(item)
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| 81 | def index(self, item, *args): return self.data.index(item, *args)
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| 82 | def reverse(self): self.data.reverse()
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| 83 | def sort(self, *args, **kwds): self.data.sort(*args, **kwds)
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| 84 | def extend(self, other):
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| 85 | if isinstance(other, UserList):
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| 86 | self.data.extend(other.data)
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| 87 | else:
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| 88 | self.data.extend(other)
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