Python threading main_thread()用法及代碼示例

Python threading.main_thread() 方法

main_thread() 是 Python 中線程模塊的內置方法。它用於返回主線程對象。在正常情況下，它是 Python 解釋器啟動的線程。

模塊：

    import threading

用法:

    main_thread()

參數：

• None

返回值：

這個方法的返回類型是<class 'threading._MainThread'>，它返回主線程對象。

例：

# Python program to explain the
# use of  main_thread()  method in Threading Module

import time
import threading

def thread_1(i):
    time.sleep(5)
    print("Value by Thread-:",i)
    
def thread_2(i):
    print("Value by Thread-2:",i)
    
def thread_3(i):
    time.sleep(4)
    print("Value by Thread-3:",i)
    
def thread_4(i):
    time.sleep(1)
    print("Value by Thread-4:",i)

# Creating sample threads 
thread1 = threading.Thread(target=thread_1, args=(10,))
thread2 = threading.Thread(target=thread_2, args=(20,))
thread3 = threading.Thread(target=thread_3, args=(30,))
thread4 = threading.Thread(target=thread_4, args=(50,))

print("Main thread for the given program:", threading.main_thread())

# Starting the threads
thread1.start()
thread2.start()
thread3.start()
thread4.start()

輸出

Main thread for the given program:<_MainThread(MainThread, started 140269857195776)>
Value by Thread-2:20
Value by Thread-4:50
Value by Thread-3:30
Value by Thread-:10