Question

我正在尝试使用joblib来并行化运行在一个函数上的循环。我希望显示功能的中间print命令，而不仅仅是功能的return值。

from joblib import Parallel, delayed

def dummy(i):
    print("the value passed is",i)

Parallel(n_jobs=2)(delayed(dummy)(i) for i in range(0,5,1))

我得到以下输出：

[None,
 None,
 None,
 None,
 None]

我想得到以下输出（或类似的东西）：

[the value passed is 0,
the value passed is 1,
the value passed is 2,
the value passed is 3,
the value passed is 4]

编辑：我只是注意到它确实在启动Jupyter笔记本的终端窗口中打印了我所需的输出。关于如何在笔记本中实际print的任何想法。预先感谢。

Answer 1

将您的i参数放入功能虚拟Parallel(n_jobs=2)(delayed(dummy(i)) for i in range(0,5,1))

Answer 2

from joblib import Parallel, delayed

def dummy(i):
    return "the value passed is " + str(i)

Parallel(n_jobs=2)(delayed(dummy)(i) for i in range(0,5,1))

输出：：

[the value passed is 0,
the value passed is 1,
the value passed is 2,
the value passed is 3,
the value passed is 4]

在joblib中打印函数的输出

2 个答案: