UserList.py revision e99d5ea25ba994491c773d9b5872332334ccd1c5 
1"""A more or less complete user-defined wrapper around list objects."""
2
3__all__ = ["UserList"]
4
5class UserList:
6    def __init__(self, initlist=None):
7        self.data = []
8        if initlist is not None:
9            # XXX should this accept an arbitrary sequence?
10            if type(initlist) == type(self.data):
11                self.data[:] = initlist
12            elif isinstance(initlist, UserList):
13                self.data[:] = initlist.data[:]
14            else:
15                self.data = list(initlist)
16    def __repr__(self): return repr(self.data)
17    def __lt__(self, other): return self.data <  self.__cast(other)
18    def __le__(self, other): return self.data <= self.__cast(other)
19    def __eq__(self, other): return self.data == self.__cast(other)
20    def __ne__(self, other): return self.data != self.__cast(other)
21    def __gt__(self, other): return self.data >  self.__cast(other)
22    def __ge__(self, other): return self.data >= self.__cast(other)
23    def __cast(self, other):
24        if isinstance(other, UserList): return other.data
25        else: return other
26    def __cmp__(self, other):
27        raise RuntimeError, "UserList.__cmp__() is obsolete"
28    def __contains__(self, item): return item in self.data
29    def __len__(self): return len(self.data)
30    def __getitem__(self, i): return self.data[i]
31    def __setitem__(self, i, item): self.data[i] = item
32    def __delitem__(self, i): del self.data[i]
33    def __getslice__(self, i, j):
34        i = max(i, 0); j = max(j, 0)
35        return self.__class__(self.data[i:j])
36    def __setslice__(self, i, j, other):
37        i = max(i, 0); j = max(j, 0)
38        if isinstance(other, UserList):
39            self.data[i:j] = other.data
40        elif isinstance(other, type(self.data)):
41            self.data[i:j] = other
42        else:
43            self.data[i:j] = list(other)
44    def __delslice__(self, i, j):
45        i = max(i, 0); j = max(j, 0)
46        del self.data[i:j]
47    def __add__(self, other):
48        if isinstance(other, UserList):
49            return self.__class__(self.data + other.data)
50        elif isinstance(other, type(self.data)):
51            return self.__class__(self.data + other)
52        else:
53            return self.__class__(self.data + list(other))
54    def __radd__(self, other):
55        if isinstance(other, UserList):
56            return self.__class__(other.data + self.data)
57        elif isinstance(other, type(self.data)):
58            return self.__class__(other + self.data)
59        else:
60            return self.__class__(list(other) + self.data)
61    def __iadd__(self, other):
62        if isinstance(other, UserList):
63            self.data += other.data
64        elif isinstance(other, type(self.data)):
65            self.data += other
66        else:
67            self.data += list(other)
68        return self
69    def __mul__(self, n):
70        return self.__class__(self.data*n)
71    __rmul__ = __mul__
72    def __imul__(self, n):
73        self.data *= n
74        return self
75    def append(self, item): self.data.append(item)
76    def insert(self, i, item): self.data.insert(i, item)
77    def pop(self, i=-1): return self.data.pop(i)
78    def remove(self, item): self.data.remove(item)
79    def count(self, item): return self.data.count(item)
80    def index(self, item): return self.data.index(item)
81    def reverse(self): self.data.reverse()
82    def sort(self, *args): apply(self.data.sort, args)
83    def extend(self, other):
84        if isinstance(other, UserList):
85            self.data.extend(other.data)
86        else:
87            self.data.extend(other)
88