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Python Source  |  1999-03-26  |  2.6 KB  |  67 lines
  1. # A more or less complete user-defined wrapper around list objects
  2.  
  3. class UserList:
  4.     def __init__(self, list=None):
  5.         self.data = []
  6.         if list is not None:
  7.             if type(list) == type(self.data):
  8.                 self.data[:] = list
  9.             else:
  10.                 self.data[:] = list.data[:]
  11.     def __repr__(self): return repr(self.data)
  12.     def __cmp__(self, other):
  13.         if isinstance(other, UserList):
  14.             return cmp(self.data, other.data)
  15.         else:
  16.             return cmp(self.data, other)
  17.     def __len__(self): return len(self.data)
  18.     def __getitem__(self, i): return self.data[i]
  19.     def __setitem__(self, i, item): self.data[i] = item
  20.     def __delitem__(self, i): del self.data[i]
  21.     def __getslice__(self, i, j):
  22.         i = max(i, 0); j = max(j, 0)
  23.         userlist = self.__class__()
  24.         userlist.data[:] = self.data[i:j]
  25.         return userlist
  26.     def __setslice__(self, i, j, other):
  27.         i = max(i, 0); j = max(j, 0)
  28.         if isinstance(other, UserList):
  29.             self.data[i:j] = other.data
  30.         elif isinstance(other, type(self.data)):
  31.             self.data[i:j] = other
  32.         else:
  33.             self.data[i:j] = list(other)
  34.     def __delslice__(self, i, j):
  35.         i = max(i, 0); j = max(j, 0)
  36.         del self.data[i:j]
  37.     def __add__(self, other):
  38.         if isinstance(other, UserList):
  39.             return self.__class__(self.data + other.data)
  40.         elif isinstance(other, type(self.data)):
  41.             return self.__class__(self.data + other)
  42.         else:
  43.             return self.__class__(self.data + list(other))
  44.     def __radd__(self, other):
  45.         if isinstance(other, UserList):
  46.             return self.__class__(other.data + self.data)
  47.         elif isinstance(other, type(self.data)):
  48.             return self.__class__(other + self.data)
  49.         else:
  50.             return self.__class__(list(other) + self.data)
  51.     def __mul__(self, n):
  52.         return self.__class__(self.data*n)
  53.     __rmul__ = __mul__
  54.     def append(self, item): self.data.append(item)
  55.     def insert(self, i, item): self.data.insert(i, item)
  56.     def pop(self, i=-1): return self.data.pop(i)
  57.     def remove(self, item): self.data.remove(item)
  58.     def count(self, item): return self.data.count(item)
  59.     def index(self, item): return self.data.index(item)
  60.     def reverse(self): self.data.reverse()
  61.     def sort(self, *args): apply(self.data.sort, args)
  62.     def extend(self, other):
  63.         if isinstance(other, UserList):
  64.             self.data.extend(other.data)
  65.         else:
  66.             self.data.extend(other)
  67.