Question

Cython，支持我这个错误...我已经展示了我的代码中生成的示例代码和错误。我使用Anaconda3最新发布的Windows，如何在类中使用带有args的线程

#cytest.pyx
from threading import Thread

cdef class t(object):

    cdef int a,b,nthreads
    cpdef readonly list retlist

    def __init__(self,int nthreads,int a=10,int b=10):
        self.a = a
        self.b = b
        self.retlist = []
        self.nthreads = nthreads

    cdef mul(self,int c,int d):
        cdef int n
        n = (self.a*c)+(self.b*d)
        self.retlist.append(n)

    cpdef run_mul(self):
        cdef int i
        cdef object Thd
        for i in range(self.nthreads):
           Thd = Thread(target=self.mul, args=(10,20))
           # Note: I got error in above arguments
           Thd.start()

上面的文件cytest.pyx编译和导入如下..

import cytest
ts = cytest.t(4)

运行以下代码时出现错误，如下所示

ts.run_mul()

如下错误....如何在cython中解决此问题

Exception in thread Thread-11:
Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\lib\threading.py", line 916, in 
_bootstrap_inner
self.run()
File "C:\ProgramData\Anaconda3\lib\threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "stringsource", line 65, in 
cfunc.to_py.__Pyx_CFunc_object____t____int____int___to_py.wrap
TypeError: wrap() takes exactly 3 positional arguments (2 given)

Exception in thread Thread-13:
Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\lib\threading.py", line 916, in 
_bootstrap_inner
self.run()
File "C:\ProgramData\Anaconda3\lib\threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "stringsource", line 65, in 
cfunc.to_py.__Pyx_CFunc_object____t____int____int___to_py.wrap
TypeError: wrap() takes exactly 3 positional arguments (2 given)

Exception in thread Thread-12:
Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\lib\threading.py", line 916, in 
_bootstrap_inner
self.run()
File "C:\ProgramData\Anaconda3\lib\threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "stringsource", line 65, in 
cfunc.to_py.__Pyx_CFunc_object____t____int____int___to_py.wrap
TypeError: wrap() takes exactly 3 positional arguments (2 given)

Exception in thread Thread-10:
Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\lib\threading.py", line 916, in 
_bootstrap_inner
self.run()
File "C:\ProgramData\Anaconda3\lib\threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "stringsource", line 65, in 
cfunc.to_py.__Pyx_CFunc_object____t____int____int___to_py.wrap
TypeError: wrap() takes exactly 3 positional arguments (2 given)

Answer 1

使功能def代替cdef。

有助于思考为什么要创建函数cdef。 cdef函数唯一真正的区别在于你说它只能在C级调用，所以你可以避免使用Python调用机制。在这种情况下，你试图将它作为可调用的Python对象传递给Python函数，这完全没有意义。

（Cython尝试用Python层包装它来帮助你一点，但这有点儿错误，并没有正确处理绑定self。你可能想把它报告为bug https://github.com/cython/cython/issues。）

Cython3使用Threading.Thread和类

1 个答案: