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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 create(self, name, sources=None, destinations=None, services=None, dynamic_src_nat=None, dynamic_src_nat_ports=(1024, 65535), static_src_nat=None, static_dst_nat=None, static_dst_nat_ports=None, is_disabled=False, used_on=None, add_pos=None, after=None, before=None, comment=None):
 """ Create a NAT rule. When providing sources/destinations or services, you can provide the element href, network element or services from ``smc.elements``. You can also mix href strings with Element types in these fields. :param str name: name of NAT rule :param list sources: list of sources by href or Element :type sources: list(str,Element) :param list destinations: list of destinations by href or Element :type destinations: list(str,Element) :param list services: list of services by href or Element :type services: list(str,Element) :param dynamic_src_nat: str ip or Element for dest NAT :type dynamic_src_nat: str,Element :param tuple dynamic_src_nat_ports: starting and ending ports for PAT. Default: (1024, 65535) :param str static_src_nat: ip or element href of used for source NAT :param str static_dst_nat: destination NAT IP address or element href :param tuple static_dst_nat_ports: ports or port range used for original and destination ports (only needed if a different destination port is used and does not match the rules service port) :param bool is_disabled: whether to disable rule or not :param str,href used_on: Can be a str href of an Element or Element of type AddressRange('ANY'), AddressRange('NONE') or an engine element. :type used_on: str,Element :param int add_pos: position to insert the rule, starting with position 1. If the position value is greater than the number of rules, the rule is inserted at the bottom. If add_pos is not provided, rule is inserted in position 1. Mutually exclusive with ``after`` and ``before`` params. :param str after: Rule tag to add this rule after. Mutually exclusive with ``add_pos`` and ``before`` params. :param str before: Rule tag to add this rule before. Mutually exclusive with ``add_pos`` and ``after`` params. :param str comment: optional comment for the NAT rule :raises InvalidRuleValue: if rule requirements are not met :raises CreateRuleFailed: rule creation failure :return: newly created NAT rule :rtype: IPv4NATRule """

        rule_values = self.update_targets(sources, destinations, services)
        rule_values.update(name=name, comment=comment)
        rule_values.update(is_disabled=is_disabled)
        
        rule_values.update(used_on=element_resolver(used_on) if used_on else used_on)
        #rule_values.update(used_on=element_resolver(AddressRange('ANY') if not \
        #    used_on else element_resolver(used_on)))
        
        if dynamic_src_nat:
            nat = DynamicSourceNAT()
            start_port, end_port = dynamic_src_nat_ports
            nat.update_field(dynamic_src_nat, start_port=start_port,
                end_port=end_port)
            rule_values.update(options=nat)
        
        elif static_src_nat:
            sources = rule_values['sources']
            if 'any' in sources or 'none' in sources:
                raise InvalidRuleValue('Source field cannot be none or any for '
                    'static source NAT.')
            
            nat = StaticSourceNAT()
            nat.update_field(static_src_nat,
                original_value=sources.get('src')[0])
            rule_values.update(options=nat)
        
        if static_dst_nat:
            destinations = rule_values['destinations']
            if 'any' in destinations or 'none' in destinations:
                raise InvalidRuleValue('Destination field cannot be none or any for '
                    'destination NAT.')
            
            nat = StaticDestNAT()
            original_port, translated_port = None, None
            if static_dst_nat_ports:
                original_port, translated_port = static_dst_nat_ports
            
            nat.update_field(static_dst_nat,
                original_value=destinations.get('dst')[0],
                original_port=original_port,
                translated_port=translated_port)
            
            rule_values.setdefault('options', {}).update(nat)

        if 'options' not in rule_values:  # No NAT
            rule_values.update(options=LogOptions())
        
        params = None
        href = self.href
        if add_pos is not None:
            href = self.add_at_position(add_pos)
        elif before or after:
            params = self.add_before_after(before, after)
        
        return ElementCreator(
            self.__class__,
            exception=CreateRuleFailed,
            href=href,
            params=params,
            json=rule_values)