"""
DynaList.py => a list that has dynamic data (ie. calculated by a 'data' method).
Please override this class and define a data(self,) method that will return the actual list.
"""

class DynaList:
    def __init__(self, initlist=None):
        pass

    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):
        raise RuntimeError, "UserList.__cmp__() is obsolete"
    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):
        raise NotImplementedError, "Not implemented"

    def __mul__(self, n):
        return self.__class__(self.data()*n)
    __rmul__ = __mul__
    def __imul__(self, n):
        raise NotImplementedError, "Not implemented"
    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): return self.data().index(item)
    def reverse(self): self.data().reverse()
    def sort(self, *args): apply(self.data().sort, args)
    def extend(self, other):
        if isinstance(other, UserList):
            self.data().extend(other.data())
        else:
            self.data().extend(other)