threads, processes, co-routines

Thread

There are two ways to create a thread from the threading module, as follows:

Mode 1:

# !/usr/bin/env python # Coding=utf-8 Import Threading def F1 (ARG):     Print (ARG) if __name__ ' __main__ ' :     = Threading. Thread (TARGET=F1, args= (1,))    t1.start ()#  output #  1 

Method 2:

class MyThread (Threading. Thread):    def__init__(self, Func, args):        = func        = args        Super (MyThread, self). __init__ ()    def  Run (self):        self.func (Self.args)def  F2 (ARG):     Print  = MyThread (F2, 123) Obj.start ()

Output
# 123

Setdaemon method

The main thread is not equal to the end of the thread execution.

#!/usr/bin/env python#Coding=utf-8ImportThreadingImport TimedefF1 (ARG): Time.sleep (2)    Print('Start', Arg)if __name__=='__main__': T1= Threading. Thread (TARGET=F1, args= (1,)) T1.setdaemon (True) T1.start ()Print(123)
Output
# 123 instead of 1 12

Join method

Indicates that the main thread waits for the child thread to finish executing, and the join parameter represents the maximum number of seconds

#!/usr/bin/env python#Coding=utf-8ImportThreadingImport TimedefF1 (ARG): Time.sleep (2)    Print('Start', Arg)if __name__=='__main__': T1= Threading. Thread (TARGET=F1, args= (1,)) T1.setdaemon (True) T1.start () T1.join ()Print(123)
Output
# 1 123

threads, processes, co-routines