import urllib2
import urllib
import json

# 目标API URL
url = 'https://api.example.com/endpoint'

# 准备POST数据
data = {
    'key1': 'value1',
    'key2': 'value2'
}

# 将字典转换为URL编码的字符串
encoded_data = urllib.urlencode(data)

# 创建请求对象
request = urllib2.Request(url, encoded_data)

# 设置请求头
request.add_header('Content-Type', 'application/x-www-form-urlencoded')
request.add_header('User-Agent', 'MyPythonScript/1.0')

try:
    # 发送请求并获取响应
    response = urllib2.urlopen(request)
    
    # 读取响应内容
    response_data = response.read()
    
    # 处理响应（假设返回的是JSON）
    result = json.loads(response_data)
    print(result)
    
except urllib2.HTTPError as e:
    print('HTTP错误:', e.code, e.reason)
except urllib2.URLError as e:
    print('URL错误:', e.reason)
except Exception as e:
    print('其他错误:', str(e))

import urllib2
import json

url = 'https://api.example.com/json_endpoint'
data = {'name': 'John', 'age': 30}

request = urllib2.Request(url)
request.add_header('Content-Type', 'application/json')
request.add_data(json.dumps(data))

try:
    response = urllib2.urlopen(request)
    print(response.read())
except urllib2.HTTPError as e:
    print('错误:', e.code, e.read())