那就转换成python

将JavaScript代码转换为Python代码，我们需要逐行映射。假设我们有一个简单的示例，这里是一个加密和发送POST请求的部分：

JavaScript (CryptoJS) 示例：

var CryptoJS = require('crypto-js');
var uuid = CryptoJS.SHA256(Math.random().toString() + new Date()).toString();
var nonce = 'random_nonce';
var signature = CryptoJS.HmacSHA256(appId + traceId + timestamp + nonce, appKey).toString();

var data = {
  pageNumbers: [1, 2],
  pageSize: 10,
  labels: ['label1', 'label2']
};

var headers = {
  'App-ID': appId,
  'Trace-ID': traceId,
  'Timestamp': timestamp,
  'Nonce': nonce,
  'Signature': signature
};

fetch(url, {
  method: 'POST',
  headers: headers,
  body: JSON.stringify(data)
}).then(response => response.json())

Python 示例：

import hashlib
import hmac
import json
import requests

uuid = hashlib.sha256(str(random.random()) + str(datetime.datetime.now())).hexdigest()
nonce = "random_nonce"
app_key = "your_app_key"
app_id = "your_app_id"
trace_id = "your_trace_id"
timestamp = int(time.time())

data = {"pageNumbers": [1, 2], "pageSize": 10, "labels": ["label1", "label2"]}
signature = hmac.new(app_key.encode(), f"{app_id}{trace_id}{timestamp}{nonce}".encode(), hashlib.sha256).hexdigest()

headers = {
    "App-ID": app_id,
    "Trace-ID": trace_id,
    "Timestamp": timestamp,
    "Nonce": nonce,
    "Signature": signature
}

url = "http://example.com/api"
response = requests.post(url, json=data, headers=headers)

if response.status_code == 200:
    result = response.json()
else:
    print(f"Error: {response.text}")

这个例子中，我们将CryptoJS的哈希函数替换成了Python内置的hashlib模块，其他部分如字符串操作、列表和字典处理基本保持一致。注意Python的requests库用于发起HTTP请求。