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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_copy_constructor(constructor):
 """ Check if the declaration is a copy constructor, Args: constructor (declarations.constructor_t):
 the constructor to be checked. Returns: bool: True if this is a copy constructor, False instead. """

    assert isinstance(constructor, calldef_members.constructor_t)
    args = constructor.arguments
    parent = constructor.parent

    # A copy constructor has only one argument
    if len(args) != 1:
        return False

    # We have only one argument, get it
    arg = args[0]

    if not isinstance(arg.decl_type, cpptypes.compound_t):
        # An argument of type declarated_t (a typedef) could be passed to
        # the constructor; and it could be a reference.
        # But in c++ you can NOT write :
        #    "typedef class MyClass { MyClass(const MyClass & arg) {} }"
        # If the argument is a typedef, this is not a copy constructor.
        # See the hierarchy of declarated_t and coumpound_t. They both
        # inherit from type_t but are not related so we can discriminate
        # between them.
        return False

    # The argument needs to be passed by reference in a copy constructor
    if not type_traits.is_reference(arg.decl_type):
        return False

    # The argument needs to be const for a copy constructor
    if not type_traits.is_const(arg.decl_type.base):
        return False

    un_aliased = type_traits.remove_alias(arg.decl_type.base)
    # un_aliased now refers to const_t instance
    if not isinstance(un_aliased.base, cpptypes.declarated_t):
        # We are looking for a declaration
        # If "class MyClass { MyClass(const int & arg) {} }" is used,
        # this is not copy constructor, so we return False here.
        # -> un_aliased.base == cpptypes.int_t (!= cpptypes.declarated_t)
        return False

    # Final check: compare the parent (the class declaration for example)
    # with the declaration of the type passed as argument.
    return id(un_aliased.base.declaration) == id(parent)