class mylistdef __init__(selfstart)#self wrapped start[:self wrapped list(startdef __add__(selfother)return mylist(self wrapped otherdef __mul__(selftime)return mylist(self wrapped timedef __getitem__(selfoffset)return self wrapped[offsetdef __len__(self)return len(self wrappeddef __getslice__(selflowhigh)return mylist(self wrapped[low:high]def append(selfnode)self wrapped append(nodedef __getattr__(selfname)return getattr(self wrappednamedef __repr__(self)return repr(self wrappedcopy startno side effects make sure it' list here also passed slice in for iteration if no __iter__ ignored in xuses __getitem__ other methodssort/reverse/etc catchall display method if __name__ ='__main__' mylist('spam'print(xprint( [ ]print( [ :]print( ['eggs']print( append(' ' sort(print(join( for in ) :\codepython mylist py [' '' '' '' ' [' '' '' '[' '' '' '' ''eggs'[' '' '' '' '' '' '' '' '' '' '' '' ' note that it' important to copy the start value by calling list instead of slicing herebecause otherwise the result may not be true list and so will not respond to expected list methodssuch as append ( slicing string returns another stringnot listyou would be able to copy mylist start value by slicing because its class overloads the slicing operation and provides the expected list interfacehoweveryou need to avoid slice-based copying for objects such as strings subclassing my solution (mysub pyappears as follows your solution should be similarpart viclasses and oop