完成此目标分两步走

1. 根据Schema定义解析推理JSON结构
2. 根据数据定义生成随机数据

当前需求为根据YAPI导出的api.json文件来生成每个接口请求参数的样例数据， YAPI导出的请求参数的json schema定义有个特点：不严谨 --- 没有声明参数的数据值的内容要求，只有数据类型要求，因此我们生成样例数据随机生成即可，没有什么限制。

第一步我们经过精准的搜索，找到开源的轮子，直接使用，第二部代码简单实现下即可。

上代码。

#!/usr/bin/env python
# coding: utf-8
# @Time     : 2021/1/7 16:21
# @Author   : guoqun X2590
# @FileName : json_schema2json.py
# @Project  : JSchema2py

"""
使用说明
pip install jschema2py
"""


from jschema2py import build_class

import json


class JsonSchema2Json:
    """
    根据给定的JSON SCHEMA结构，随机赋值，生成json样例数据
    """
    def __init__(self):
        self.__string_sample = "I_am_a_string_data"
        self.__number_sample = 123
        self.__boolean_sample = True
        self.__array_string_sample = ["one_string", "two_string"]
        self.__array_number_sample = [1, 2, 3]
        self.__array_boolean_sample = [True, False]

    @staticmethod
    def pre_process_yapi_schema(schema_string):
        """
        将yapi提供的schema字符串进行预处理
        :param schema_string:
        :return:
        """
        __top_level = json.loads(schema_string)
        content_dict = __top_level['schema']
        __title = "one default title"
        content_dict['title'] = __title
        return content_dict

    def generate_sample_json(self, schema_dict):
        """
        生成样例json数据
        :param schema_dict:
        :return:
        """
        sample = build_class(schema_dict)()
        properties = schema_dict['properties']
        for __key, __value in properties.items():
            if __value['type'] == 'string':
                sample.__setattr__(__key, self.__string_sample)
            if __value['type'] == 'number':
                sample.__setattr__(__key, self.__number_sample)
            if __value['type'] == 'boolean':
                sample.__setattr__(__key, self.__boolean_sample)
            if __value['type'] == 'array':
                if __value['items']['type'] == 'number':
                    sample.__setattr__(__key, self.__array_number_sample)
                if __value['items']['type'] == 'string':
                    sample.__setattr__(__key, self.__array_string_sample)
                if __value['items']['type'] == 'boolean':
                    sample.__setattr__(__key, self.__array_boolean_sample)
        return str(sample)


if __name__ == '__main__':
    yapi_test_data = '''{"schema":{"$schema":"http://json-schema.org/draft-04/schema#","type":"object","properties":{"proType":{"type":"string","description":"属性类型"},"proValue":{"type":"string","description":"属性值"},"startTime":{"type":"string","description":"开始时间"},"endTime":{"type":"string","description":"结束时间"},"warnSources":{"type":"array","items":{"type":"number"},"description":"轨迹预警来源"}},"required":["proType","proValue"]},"required":true}'''
    js2j = JsonSchema2Json()
    schema = js2j.pre_process_yapi_schema(yapi_test_data)
    sample_data = js2j.generate_sample_json(schema)
    print(sample_data)