相关疑难解决方法(0)

在创建我需要的实际应用程序之前,我试图对此有一个基本的了解.我最近从2.7移到了3.3.

从python文档直接复制粘贴此代码失败,这里稍微简单的示例也是如此.

这是我的代码,派生自第二个例子:

import concurrent.futures

nums = [1,2,3,4,5,6,7,8,9,10]

def f(x):
    return x * x

# Make sure the map and function are working
print([val for val in map(f, nums)])

# Test to make sure concurrent map is working
with concurrent.futures.ProcessPoolExecutor() as executor:
    for item in executor.map(f, nums):
        print(item)

这是输出:

[1, 4, 9, 16, 25, 36, 49, 64, 81, 100]
Traceback (most recent call last):
  File "<string>", line 420, in run_nodebug
  File "<module1>", line 13, in …