"""A more or less complete user-defined wrapper around list objects.""" | |
import collections | |
class UserList(collections.MutableSequence): | |
def __init__(self, initlist=None): | |
self.data = [] | |
if initlist is not None: | |
# XXX should this accept an arbitrary sequence? | |
if type(initlist) == type(self.data): | |
self.data[:] = initlist | |
elif isinstance(initlist, UserList): | |
self.data[:] = initlist.data[:] | |
else: | |
self.data = list(initlist) | |
def __repr__(self): return repr(self.data) | |
def __lt__(self, other): return self.data < self.__cast(other) | |
def __le__(self, other): return self.data <= self.__cast(other) | |
def __eq__(self, other): return self.data == self.__cast(other) | |
def __ne__(self, other): return self.data != self.__cast(other) | |
def __gt__(self, other): return self.data > self.__cast(other) | |
def __ge__(self, other): return self.data >= self.__cast(other) | |
def __cast(self, other): | |
if isinstance(other, UserList): return other.data | |
else: return other | |
def __cmp__(self, other): | |
return cmp(self.data, self.__cast(other)) | |
__hash__ = None # Mutable sequence, so not hashable | |
def __contains__(self, item): return item in self.data | |
def __len__(self): return len(self.data) | |
def __getitem__(self, i): return self.data[i] | |
def __setitem__(self, i, item): self.data[i] = item | |
def __delitem__(self, i): del self.data[i] | |
def __getslice__(self, i, j): | |
i = max(i, 0); j = max(j, 0) | |
return self.__class__(self.data[i:j]) | |
def __setslice__(self, i, j, other): | |
i = max(i, 0); j = max(j, 0) | |
if isinstance(other, UserList): | |
self.data[i:j] = other.data | |
elif isinstance(other, type(self.data)): | |
self.data[i:j] = other | |
else: | |
self.data[i:j] = list(other) | |
def __delslice__(self, i, j): | |
i = max(i, 0); j = max(j, 0) | |
del self.data[i:j] | |
def __add__(self, other): | |
if isinstance(other, UserList): | |
return self.__class__(self.data + other.data) | |
elif isinstance(other, type(self.data)): | |
return self.__class__(self.data + other) | |
else: | |
return self.__class__(self.data + list(other)) | |
def __radd__(self, other): | |
if isinstance(other, UserList): | |
return self.__class__(other.data + self.data) | |
elif isinstance(other, type(self.data)): | |
return self.__class__(other + self.data) | |
else: | |
return self.__class__(list(other) + self.data) | |
def __iadd__(self, other): | |
if isinstance(other, UserList): | |
self.data += other.data | |
elif isinstance(other, type(self.data)): | |
self.data += other | |
else: | |
self.data += list(other) | |
return self | |
def __mul__(self, n): | |
return self.__class__(self.data*n) | |
__rmul__ = __mul__ | |
def __imul__(self, n): | |
self.data *= n | |
return self | |
def append(self, item): self.data.append(item) | |
def insert(self, i, item): self.data.insert(i, item) | |
def pop(self, i=-1): return self.data.pop(i) | |
def remove(self, item): self.data.remove(item) | |
def count(self, item): return self.data.count(item) | |
def index(self, item, *args): return self.data.index(item, *args) | |
def reverse(self): self.data.reverse() | |
def sort(self, *args, **kwds): self.data.sort(*args, **kwds) | |
def extend(self, other): | |
if isinstance(other, UserList): | |
self.data.extend(other.data) | |
else: | |
self.data.extend(other) |