### Python Native Payment Integration Demo

Source: https://www.yuque.com/leshua-jhzf/qrcode_pay/ice1rg?language=en-us

Demonstrates MD5 signature generation and merchant order ID formatting for the payment interface.

```python
import hashlib
import requests
import datetime
import random
import string
import json
'''
定义签名函数
'''
def sign_MD5(data):
unsigned_items = sorted(data.items(), key=lambda d: d[0], reverse=False)
unsigned_string = "&".join("{0}={1}".format(k, v) for k, v in unsigned_items)+"&key="+key
print(unsigned_string)
h = hashlib.md5()
h.update(unsigned_string.encode(encoding="utf-8"))
return h.hexdigest().upper()
'''
定义商户订单号规则，服务商可根据自身规则自由定义
'''
def mer_order_id():
now = datetime.datetime.now()
order_id0 = "T" + now.strftime("%Y-%m-%d-%H-%M-%S").replace("-", "")
ran_str = ''.join(random.sample(string.ascii_letters + string.digits, 8))
```

--------------------------------

### Python Refund Transaction Demo

Source: https://www.yuque.com/leshua-jhzf/qrcode_pay/kegaff?language=en-us

Provides a reference implementation for MD5 signature generation and merchant order ID creation. Ensure the 'key' variable is defined before calling the signing function.

```python
import hashlib
import requests
import datetime
import random
import string
import json
'''
定义签名函数
'''
def sign_MD5(data):
unsigned_items = sorted(data.items(), key=lambda d: d[0], reverse=False)
unsigned_string = "&".join("{0}={1}".format(k, v) for k, v in unsigned_items)+"&key="+key
print(unsigned_string)
h = hashlib.md5()
h.update(unsigned_string.encode(encoding="utf-8"))
return h.hexdigest().upper()
'''
定义商户订单号规则，服务商可根据自身规则自由定义
'''
def mer_order_id():
now = datetime.datetime.now()
order_id0 = "T" + now.strftime("%Y-%m-%d-%H-%M-%S").replace("-", "")
ran_str = ''.join(random.sample(string.ascii_letters + string.digits, 8))
order_id=order_id0 + ran_str
```

--------------------------------

### 云闪付 Native支付接口

Source: https://www.yuque.com/leshua-jhzf/qrcode_pay/ice1rg?language=en-us

该接口用于发起云闪付Native支付请求，支持商户通过聚合支付平台完成交易。

```APIDOC
## [POST] 云闪付 Native支付

### Description
发起云闪付Native支付请求，商户需按照接口规范提交主域及子域参数。

### Method
POST

### Parameters
#### 请求参数
- **主域参数** (object) - 包含基础业务字段
- **子域参数** (object) - 包含业务扩展字段，如 goods_detail, terminal_info, pid_Info

### Response
#### Success Response (200)
- **主域参数** (object) - 响应基础字段
- **子域参数** (object) - 响应扩展字段

### 错误码
- 接口通过响应错误码字段标识业务处理结果。
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.