Lib/UserList.py

   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)