Question

这是我到目前为止所做的：

from threading import Thread

import pdb

with open('data.txt') as f:
    threadcount = sum(1 for _ in f)

print "There are " + str(threadcount) + " lines/threads."
pdb.set_trace()

def Main():
    for line in threadcount:    
        line = Thread(target=timer, args=())
        line.start()

        print "Main Complete"

if __name__ == '__main__':
        Main()

我想知道如何根据行数在函数中动态构建这些线程;所以它会迭代创建所需数量的线程？我不知道该做什么/下一步去哪里。

所以我想为我正在处理的文本文件中的每一行提供一个线程，通常不会超过10-20行。

编辑：

好的，这就是我现在拥有的：来自线程导入线程

import pdb

with open('data.txt') as f:
    threadcount = sum(1 for _ in f)

print "There are " + str(threadcount) + " lines/threads."
#pdb.set_trace()

def stuff():
    print "stuff"

def Main():
    for line in xrange(threadcount):    
        #line = Thread(target=stuff, args=())
        line = Thread()
        line.start()

        print "this is thread " + str(line)

if __name__ == '__main__':
        Main()

并产生此输出：

There are 10 lines/threads.
this is thread <Thread(Thread-1, started 11612)>
this is thread <Thread(Thread-2, started 20692)>
this is thread <Thread(Thread-3, started 22232)>
this is thread <Thread(Thread-4, stopped 21620)>
this is thread <Thread(Thread-5, stopped 5620)>
this is thread <Thread(Thread-6, started 20496)>
this is thread <Thread(Thread-7, started 13844)>
this is thread <Thread(Thread-8, started 17128)>
this is thread <Thread(Thread-9, started 20256)>
this is thread <Thread(Thread-10, started 11796)>
this is thread <Thread(Thread-11, started 12416)>
this is thread <Thread(Thread-12, started 7720)>
this is thread <Thread(Thread-13, started 18680)>
this is thread <Thread(Thread-14, started 21452)>
this is thread <Thread(Thread-15, stopped 5796)>
this is thread <Thread(Thread-16, started 8452)>
this is thread <Thread(Thread-17, started 20388)>
this is thread <Thread(Thread-18, started 16652)>
this is thread <Thread(Thread-19, stopped 872)>
this is thread <Thread(Thread-20, started 16480)>

那么为什么它最终会以20个线程而不是10个线程结束呢？为什么打印出来的数字长而不仅仅是一个数字呢？更改为xrange有什么关系？

Answer 1

这一行错了：

for line in threadcount:

threadcount是一个整数，你只能迭代序列。

如果您想多次迭代，可以使用xrange：

>>> for time in xrange(3):
...     print time
0
1
2

你需要：

for line in xrange(threadcount):
     ...

如何根据文件中的行数动态生成项目中的线程？

1 个答案: