如何使for循环在python中创建进程?

你可以用 Pool 决定同时运行多少个进程。你不必为此建立循环。

from multiprocessing import Pool
import requests

def f(url):
    print('url:', url)

    data = requests.get(url).json()
    result = data['args']

    return result


if __name__ == '__main__':

    urls = [
        'https://httpbin.org/get?x=1', 
        'https://httpbin.org/get?x=2', 
        'https://httpbin.org/get?x=3', 
        'https://httpbin.org/get?x=4', 
        'https://httpbin.org/get?x=5',
    ]

    numer_of_processes = 2

    with Pool(numer_of_processes) as p:
        results = p.map(f, urls)

    print(results)

它将用前两个url启动两个进程。当其中一个结束其作业时,它将使用下一个url再次启动进程。

您可以在文档中看到pool的类似示例: multiprocessing