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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 _handle_group_with(self, group_with):
        '''Handle input option group_with'''
        if group_with is None or not group_with:
            var_name = []
            var_value = []
        elif isinstance(group_with, str):
            var_name = ['_' + group_with]
            if group_with not in env.sos_dict:
                raise ValueError(f'Variable {group_with} does not exist.')
            var_value = [env.sos_dict[group_with]]
        elif isinstance(group_with, dict):
            var_name = []
            var_value = []
            for k, v in group_with.items():
                var_name.append(k)
                var_value.append(v)
        elif isinstance(group_with, Iterable):
            try:
                var_name = ['_' + x for x in group_with]
            except Exception:
                raise ValueError(
                    f'Invalud value for option group_with {group_with}')
            var_value = []
            for vn in var_name:
                if vn[1:] not in env.sos_dict:
                    raise ValueError(f'Variable {vn[1:]} does not exist.')
                var_value.append(env.sos_dict[vn[1:]])
        else:
            raise ValueError(
                f'Unacceptable value for parameter group_with: {group_with}')
        #
        for vn, vv in zip(var_name, var_value):
            self.group_with(vn, vv)