Join function in the thread module in Python

Http://www.cnblogs.com/vingi/articles/2657790.html

 for  in range:        = threadtest (i)        thread_arr.append (t)    for in range :        thread_arr[i].start (    )for in range:        Thread_arr[i].join ()

Simply put, the blocking process directs the thread to complete execution. The common practice is that we start a batch of threads and finally join these threads to the end.

Summarize:
The purpose of the 1 join method is to block the main process from executing a JOIN statement, to focus on multi-threaded execution, and to wait until the multithreaded execution is complete before the main thread's statement executes.
2 Multi-threaded multi-join cases, execute each thread's join method sequentially, before the last one is executed.
3 without parameters, the next thread's join is not started until the thread ends.
4 after the parameter is set, the thread waits for n seconds, regardless of whether the thread is finished or not, to begin executing the subsequent main process.

Join function in the thread module in Python