python - Python中的多线程问题

Question

刚接触 Python 多线程并编写如此简单的程序，这是我的代码和错误消息，有什么想法有什么问题吗？谢谢。

使用 Python 2.7。

import time
import thread

def uploader(threadName):

    while True:
        time.sleep(5)
        print threadName

if __name__ == "__main__":

    numOfThreads = 5
    try:
        i = 0
        while i < numOfThreads:
            thread.start_new_thread(uploader, ('thread'+str(i)))
            i += 1

        print 'press any key to exit test'
        n=raw_input()

    except:
       print "Error: unable to start thread"

Unhandled exception in thread started by <pydev_monkey._NewThreadStartupWithTrace instance at 0x10e12c830>
Traceback (most recent call last):
  File "/Applications/PyCharm CE.app/Contents/helpers/pydev/pydev_monkey.py", line 521, in __call__
    return self.original_func(*self.args, **self.kwargs)
TypeError: uploader() takes exactly 1 argument (7 given)

提前致谢，林

Answer 1

thread.start_new_thread 的参数 need to be a tuple .而不是这个:

('thread' + str(i))  # results in a string

试试这个参数:

('thread' + str(i),)  # a tuple with a single element

顺便说一句，你应该查看 threading module ，这是比 thread 更高级别的接口(interface)。