Home  >  Q&A  >  body text

python 2.7 如何实现http post多并发?

注意是python 2.7, (multiprocessing值支持到2.6,2.7下安装会报错)

用threadpool试了一下,总是报错:

单次并发的函数

data = ['a', 'b', 'c']
#data传到threadpool.makeRequests里面的第二个参数,函数会将这个列表里面的值取出来,然后根据并发数进行并发。
def repost(data):
    response = requests.post(url, data).text
    return response

结果处理函数,只是打印出来

def postresult(requestself, responseresult):
    print(responseresult)
    #其他的处理,比如对结果插入到数据库,或者写入日志等,可以在这里写

pool = threadpool.ThreadPool(5)
requests = threadpool.makeRequests(repost, data, postresult)
**#之前出问题,是因为这里requests的名称定义和requests()方法冲突了。。。然后报错又很奇怪,没引起注意,把这里的requests改个名字就OK了。各位,承让了。
当然,下面这一样,也改一下。requests的名称。
[pool.putRequest(req) for req in requests]
pool.wait()

报错如下:

Traceback (most recent call last):
  File "C:\User\AppData\Local\Programs\Python\Python35-32\lib\site-packages\threadpool.py", line 158, in run
    result = request.callable(*request.args, **request.kwds)
  File "C:\test.py", line 29, in repost
    response = requests.post(url, data1).text
AttributeError: 'list' object has no attribute 'post'

或者有没有其他实现方法?

我靠,我靠,我靠靠靠。。。。问题解决了。看上面的备注。再见。

PHP中文网PHP中文网2740 days ago953

reply all(2)I'll reply

  • 阿神

    阿神2017-04-18 10:20:50

    First, paste the entire test.py. From the error message, you should have overwritten the request variable, causing the request to become a list type.

    It is recommended not to use ThreadPool to achieve multiple concurrency. Based on the characteristics of Python, even if you use multi-threading, you can only run one instruction at the same time, and the performance improvement of multi-threading is limited.

    You should first make the network asynchronous, and then implement basic ioloop. You can also implement single-threaded multi-concurrency based on asyncio or tornado

    reply
    0
  • 巴扎黑

    巴扎黑2017-04-18 10:20:50

    2.7 does not have asyncio, you can use gevent or the like, and there are dozens of 2.7 that should have multiprocessing, but yours is IO-intensive, and using multiple processes will be counterproductive. Use a third-party library to implement coroutines

    reply
    0
  • Cancelreply