### Python与欧易交易所API对接实现量化交易平台搭建
#### 了解欧易交易所API接口
为了能够通过Python操作欧易交易所,开发者需要先注册成为该平台用户并获取API密钥。API提供了多种功能调用方式,包括市场数据查询、账户信息读取以及下单等功能[^1]。
#### 安装必要的库文件
在开始编写代码之前,需安装一些第三方库来简化HTTP请求处理过程和JSON解析工作。可以利用`pip install requests`命令完成对requests库的安装;另外还需要引入pandas用于数据分析处理[^2]。
```bash
pip install requests pandas
```
#### 获取行情数据
下面展示了一段简单的Python脚本用来获取最新价格:
```python
import requests
def get_latest_price(symbol='BTCUSDT'):
url = f"https://api.okex.com/api/v5/market/ticker?instId={symbol}"
response = requests.get(url).json()
if 'data' not in response or len(response['data']) == 0:
raise Exception('Failed to fetch latest price')
ticker_data = response['data'][0]
last_trade_price = float(ticker_data['last'])
return last_trade_price
```
这段程序定义了一个名为`get_latest_price()` 的函数,它接受一个参数`symbols`(默认为比特币/美元),并通过发送GET请求到指定URL地址获得最新的成交价[^3]。
#### 下单交易指令
当准备执行买卖动作时,则要构建更复杂的POST请求向服务器提交订单详情。这里给出一个简单例子说明如何创建限价买单:
```python
import hashlib, hmac, time
from urllib.parse import urlencode
class OkexClient(object):
def __init__(self, api_key=None, secret_key=None, passphrase=None):
self.base_url = "https://www.okex.com"
self.api_key = api_key
self.secret_key = secret_key
self.passphrase = passphrase
def _sign(self, method, path, query_params=None, body=None):
timestamp = str(time.time()).split('.')[0]+'.'+str(int(round(time.time()*1000)))[-3:]
message = timestamp + method.upper() + path + (f"?{urlencode(query_params)}" if query_params else "") + (body if body else "")
signature = base64.b64encode(hmac.new(bytes(self.secret_key,'utf8'), bytes(message,'utf8'), digestmod=hashlib.sha256).digest())
headers = {
"OK-ACCESS-KEY": self.api_key,
"OK-ACCESS-SIGN": signature.decode(),
"OK-ACCESS-TIMESTAMP": timestamp,
"OK-ACCESS-PASSPHRASE": self.passphrase,
"Content-Type": "application/json",
}
return headers
def place_order(self, side="buy", instrument_id="BTC-USDT", size=1, order_type="limit", price=None):
endpoint = "/api/spot/v3/orders"
params = {"side": side,"instrument_id": instrument_id,"type":order_type}
if order_type=="limit":
params["price"]=str(price)
params["size"]=str(size)
header=self._sign("POST",endpoint,params,json.dumps(params))
resp=requests.post(f"{self.base_url}{endpoint}",headers=header,data=json.dumps(params)).json()
try:
result={"status":"success","message":"","order_id":""}
result.update(resp)
return result
except KeyError as e:
error_msg=f"Error placing order: {e}. Response was:\n{resp}"
logging.error(error_msg)
return {"status":"failure","message":error_msg}
client = OkexClient(api_key='your_apikey',secret_key='your_secretkey',passphrase='your_passphrase')
print(client.place_order(side="buy", instrument_id="ETH-USDT", size=.01, order_type="market"))
```
上述类实现了签名算法,并封装了下单逻辑。注意替换掉示例中的API Key等相关字段为自己实际申请得到的信息[^4]。