1 """A more or less complete user-defined wrapper around list objects.""" 2 3 import collections 4 5 class UserList(collections.MutableSequence): 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 return cmp(self.data, self.__cast(other)) 28 __hash__ = None # Mutable sequence, so not hashable 29 def __contains__(self, item): return item in self.data 30 def __len__(self): return len(self.data) 31 def __getitem__(self, i): return self.data[i] 32 def __setitem__(self, i, item): self.data[i] = item 33 def __delitem__(self, i): del self.data[i] 34 def __getslice__(self, i, j): 35 i = max(i, 0); j = max(j, 0) 36 return self.__class__(self.data[i:j]) 37 def __setslice__(self, i, j, other): 38 i = max(i, 0); j = max(j, 0) 39 if isinstance(other, UserList): 40 self.data[i:j] = other.data 41 elif isinstance(other, type(self.data)): 42 self.data[i:j] = other 43 else: 44 self.data[i:j] = list(other) 45 def __delslice__(self, i, j): 46 i = max(i, 0); j = max(j, 0) 47 del self.data[i:j] 48 def __add__(self, other): 49 if isinstance(other, UserList): 50 return self.__class__(self.data + other.data) 51 elif isinstance(other, type(self.data)): 52 return self.__class__(self.data + other) 53 else: 54 return self.__class__(self.data + list(other)) 55 def __radd__(self, other): 56 if isinstance(other, UserList): 57 return self.__class__(other.data + self.data) 58 elif isinstance(other, type(self.data)): 59 return self.__class__(other + self.data) 60 else: 61 return self.__class__(list(other) + self.data) 62 def __iadd__(self, other): 63 if isinstance(other, UserList): 64 self.data += other.data 65 elif isinstance(other, type(self.data)): 66 self.data += other 67 else: 68 self.data += list(other) 69 return self 70 def __mul__(self, n): 71 return self.__class__(self.data*n) 72 __rmul__ = __mul__ 73 def __imul__(self, n): 74 self.data *= n 75 return self 76 def append(self, item): self.data.append(item) 77 def insert(self, i, item): self.data.insert(i, item) 78 def pop(self, i=-1): return self.data.pop(i) 79 def remove(self, item): self.data.remove(item) 80 def count(self, item): return self.data.count(item) 81 def index(self, item, *args): return self.data.index(item, *args) 82 def reverse(self): self.data.reverse() 83 def sort(self, *args, **kwds): self.data.sort(*args, **kwds) 84 def extend(self, other): 85 if isinstance(other, UserList): 86 self.data.extend(other.data) 87 else: 88 self.data.extend(other) 89
