python线程任务run

Python Thread.run()方法 (Python Thread.run() Method)

Thread.run() method is an inbuilt method of the Thread class of the threading module in Python. This method is used to represent a thread's activity. It calls the method expressed as the target argument in the Thread object along with the positional and keyword arguments taken from the args and kwargs arguments, respectively. This method can also be overridden in the subclass.

Thread.run()方法是Python中线程模块的Thread类的内置方法。 此方法用于表示线程的活动。 它调用在Thread对象中表示为目标参数的方法，以及分别从args和kwargs参数获取的position和关键字参数。 也可以在子类中重写此方法。

Module:

模块：

    from threading import Thread

Syntax:

句法：

    run()

Parameter(s):

参数：

• None

  没有

Return value:

返回值：

The return type of this method is <class 'NoneType'>, it returns nothing.

此方法的返回类型为<class'NoneType'> ，它什么也不返回。

Example:

例：

# Python program to explain the
# use of run() method in Thread class
import threading
def thread_1(i):
print('Value by Thread 1:', i)
def thread_2(i):
print('Value by Thread 2:', i)
def thread_3(i):
print('Value by Thread 3:', i)
# Creating three sample threads
thread1 = threading.Thread(target=thread_1, args=(1,))
thread2 = threading.Thread(target=thread_2, args=(2,))
thread3 = threading.Thread(target=thread_3, args=(3,))
# Running three thread object
thread1.run()
thread2.run()
thread3.run()

Output

输出量

Value by Thread 1: 1
Value by Thread 2: 2
Value by Thread 3: 3

run() method can also be overridden in the subclass. Given below creates a subclass of the Thread class and overrides the run function.

run()方法也可以在子类中重写。 下面给出的创建Thread类的子类并覆盖run函数。

Example:

例：

# Python program to demonstrate
# the overriding of run() method
import threading
class mythread(threading.Thread):
def __init__(self, thread_name, thread_ID):
threading.Thread.__init__(self)
self.thread_name = thread_name
self.thread_ID = thread_ID
# Overrriding of run() method in the subclass
def run(self):
print("Thread name: "+str(self.thread_name) +"  "+ "Thread id: "+str(self.thread_ID));
thread1 = mythread("thread1", 1)
thread2 = mythread("thread2", 2);
thread1.start()
thread2.start()

Output

输出量

Thread name: thread1  Thread id: 1
Thread name: thread2  Thread id: 2

翻译自: https://www.includehelp.com/python/thread-run-method-with-example.aspx

python线程任务run