小编Dus*_*jic的帖子

我有一个直到今天都可以进行多处理的脚本。为了重现这个问题，我简化了与下面显示的函数并行化的函数：

    from multiprocessing import Process, Queue
    import random

    def rand_num():
        num = random.random()
        print(num)

    if __name__ == "__main__":
        queue = Queue()

        processes = [Process(target=rand_num, args=()) for x in range(4)]

        for p in processes:
            p.start()

        for p in processes:
            p.join()

呈现完全相同的错误消息（重复 4 次，为了可读性我省略了重复）：

    Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "/usr/local/Cellar/python@3.8/3.8.1/Frameworks/Python.framework/Versions/3.8/lib/python3.8/multiprocessing/spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
    File "/usr/local/Cellar/python@3.8/3.8.1/Frameworks/Python.framework/Versions/3.8/lib/python3.8/multiprocessing/spawn.py", line 125, in _main
    prepare(preparation_data)
    File "/usr/local/Cellar/python@3.8/3.8.1/Frameworks/Python.framework/Versions/3.8/lib/python3.8/multiprocessing/spawn.py", line 236, in prepare
    _fixup_main_from_path(data['init_main_from_path'])
    File "/usr/local/Cellar/python@3.8/3.8.1/Frameworks/Python.framework/Versions/3.8/lib/python3.8/multiprocessing/spawn.py", line …

我有一些数据,我正在尝试使用以下方法拟合幂律曲线:

z <- nls(y ~ a*x^b+c, start = list(a=1, b=1))

但是,我不断收到以下错误消息:

*x ^ b + c中的错误:二元运算符的非数字参数

(较短的版本即y ~ a*x^b+c工作正常,但我需要免费的术语c).

有任何想法吗 ？