python之執行緒

程序和執行緒都是虛擬單位，只是為了我們更加方便的描述問題

3.1、方式一

from threading import thread

import time
def task(name):
print(f' is running')
time.sleep(1)
print(f' is stopping')
# 開執行緒的**不需要寫在main中
# 但是習慣性的將啟動命令寫在main下面
t = thread(target=task,args=('tzh',))
t.start()
print('我是主線程')

from threading import thread

import time
class mythead(thread):
def __init__(self,name):
#重寫別人的方法
super().__init__()
self.name = name
def run(self):
print(f' is running')
time.sleep(1)
print(f' is stoppings')
print('tzh666')
if __name__ == '__main__':
t = mythead('tzh')
t.start()

from threading import thread

import time
def task(name):
print('%s is running'%name)
time.sleep(3)
print('%s is over'%name)
if __name__ == '__main__':
t = thread(target=task,args=('egon',))
t.start()
t.join()  # 主線程等待子執行緒執行結束再執行
print('主')

from threading import thread

import time
money = 100
def task():
global money
money = 666
print(money)
if __name__ == '__main__':
t = thread(target=task)
t.start()
t.join()
print(money)

from threading import thread, active_count, current_thread

import os, time
def task():
print(f'子程序號是：')
print(f'子執行緒名字是：')
time.sleep(2)
if __name__ == '__main__':
t = thread(target=task)
t.start()
#列印出來是一樣的，因為他們在同乙個下程序中
print(f'主程序號是：')
print(f'主線程名字是：')
print(f'活躍的執行緒數：')

from threading import thread

import time
def task(name):
print('%s is running'%name)
time.sleep(1)
print('%s is over'%name)
if __name__ == '__main__':
t = thread(target=task, args=('tzh', ))
t.daemon = true
t.start()
print('主')

from threading import thread

import time
def foo():
print(123)
time.sleep(1)
print('end123')
def func():
print(456)
time.sleep(3)
print('end456')
if __name__ == '__main__':
t1 = thread(target=foo)
t2 = thread(target=func)
t1.daemon = true
t1.start()
t2.start()
print('主.......')
--輸出--
123456
主.......
end123
end456

from threading import thread, lock

import time
money = 100
mutex = lock()
def task():
global money
#上鎖mutex.acquire()
tmp = money
time.sleep(0.1)
money = tmp - 1
#用完之後釋放
mutex.release()
if __name__ == '__main__':
t_list = 
for i in range(100):
t = thread(target=task)
t.start()
for t in t_list:
t.join()
print(money)

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