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Text File  |  2004-06-01  |  4KB  |  86 lines
  1. """A more or less complete user-defined wrapper around list objects."""
  2.  
  3. class UserList:
  4.     def __init__(self, initlist=None):
  5.         self.data = []
  6.         if initlist is not None:
  7.             # XXX should this accept an arbitrary sequence?
  8.             if type(initlist) == type(self.data):
  9.                 self.data[:] = initlist
  10.             elif isinstance(initlist, UserList):
  11.                 self.data[:] = initlist.data[:]
  12.             else:
  13.                 self.data = list(initlist)
  14.     def __repr__(self): return repr(self.data)
  15.     def __lt__(self, other): return self.data <  self.__cast(other)
  16.     def __le__(self, other): return self.data <= self.__cast(other)
  17.     def __eq__(self, other): return self.data == self.__cast(other)
  18.     def __ne__(self, other): return self.data != self.__cast(other)
  19.     def __gt__(self, other): return self.data >  self.__cast(other)
  20.     def __ge__(self, other): return self.data >= self.__cast(other)
  21.     def __cast(self, other):
  22.         if isinstance(other, UserList): return other.data
  23.         else: return other
  24.     def __cmp__(self, other):
  25.         return cmp(self.data, self.__cast(other))
  26.     def __contains__(self, item): return item in self.data
  27.     def __len__(self): return len(self.data)
  28.     def __getitem__(self, i): return self.data[i]
  29.     def __setitem__(self, i, item): self.data[i] = item
  30.     def __delitem__(self, i): del self.data[i]
  31.     def __getslice__(self, i, j):
  32.         i = max(i, 0); j = max(j, 0)
  33.         return self.__class__(self.data[i:j])
  34.     def __setslice__(self, i, j, other):
  35.         i = max(i, 0); j = max(j, 0)
  36.         if isinstance(other, UserList):
  37.             self.data[i:j] = other.data
  38.         elif isinstance(other, type(self.data)):
  39.             self.data[i:j] = other
  40.         else:
  41.             self.data[i:j] = list(other)
  42.     def __delslice__(self, i, j):
  43.         i = max(i, 0); j = max(j, 0)
  44.         del self.data[i:j]
  45.     def __add__(self, other):
  46.         if isinstance(other, UserList):
  47.             return self.__class__(self.data + other.data)
  48.         elif isinstance(other, type(self.data)):
  49.             return self.__class__(self.data + other)
  50.         else:
  51.             return self.__class__(self.data + list(other))
  52.     def __radd__(self, other):
  53.         if isinstance(other, UserList):
  54.             return self.__class__(other.data + self.data)
  55.         elif isinstance(other, type(self.data)):
  56.             return self.__class__(other + self.data)
  57.         else:
  58.             return self.__class__(list(other) + self.data)
  59.     def __iadd__(self, other):
  60.         if isinstance(other, UserList):
  61.             self.data += other.data
  62.         elif isinstance(other, type(self.data)):
  63.             self.data += other
  64.         else:
  65.             self.data += list(other)
  66.         return self
  67.     def __mul__(self, n):
  68.         return self.__class__(self.data*n)
  69.     __rmul__ = __mul__
  70.     def __imul__(self, n):
  71.         self.data *= n
  72.         return self
  73.     def append(self, item): self.data.append(item)
  74.     def insert(self, i, item): self.data.insert(i, item)
  75.     def pop(self, i=-1): return self.data.pop(i)
  76.     def remove(self, item): self.data.remove(item)
  77.     def count(self, item): return self.data.count(item)
  78.     def index(self, item, *args): return self.data.index(item, *args)
  79.     def reverse(self): self.data.reverse()
  80.     def sort(self, *args, **kwds): self.data.sort(*args, **kwds)
  81.     def extend(self, other):
  82.         if isinstance(other, UserList):
  83.             self.data.extend(other.data)
  84.         else:
  85.             self.data.extend(other)
  86.