assert False 与 try 结合 在开发中的使用

# coding=utf-8

from rest_framework.views import exception_handler
from rest_framework.exceptions import ErrorDetail
from share.dj_customer.rest_api_exception import CustomerError


def custom_exception_handler(exc, context):
    # Call REST framework‘s default exception handler first,
    # to get the standard error response.
    ....
        if isinstance(old_data, dict):
            if old_data.get(‘detail‘) is not None:
                if isinstance(old_data[‘detail‘], tuple):
                    new_data[‘code‘], new_data[‘message‘] = old_data[‘detail‘][0:2]
                elif isinstance(old_data[‘detail‘], str):
                    new_data[‘message‘] = old_data[‘detail‘]
            else:
                try:
                    # e.g. user_name [ErrorDetail(string=‘Ensure this field has no more than 16 characters.‘, code=‘max_length‘)]
                    msg = ‘‘
                    for serializer_field, v in old_data.items():
                        if isinstance(serializer_field, str) and isinstance(v, list):
                            if isinstance(v[0], ErrorDetail):
                                msg += serializer_field + ‘:‘ + v[0].__str__()
                            else:
                                assert False
                        else:
                            assert False
                    # e.g.
                    # {
                    #     "success": false,
                    #     "code": 1001,
                    #     "message": "参数错误 : user_name:Ensure this field has no more than 16 characters.age:A valid integer is required."
                    # }
                    new_data[‘code‘], new_data[‘message‘] = CustomerError.PARAM_ERROR
                    new_data[‘message‘] += ‘ : ‘ + msg
                except:
                    assert False