import subprocess def run_command_with_timeout(command, timeout): process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE) try: stdout, stderr = process.communicate(timeout=timeout) r
``` # Python script to execute SQL queries on a database import sqlite3 def execute_query(connection, query): cursor = connection.cursor() cursor.execute(query) result = cursor.fetchall() return result ``` 说明: 此Python脚本是在数据库上执行SQL查询的通用函数。您可以将查询作为参数与数据库连...
# 使用 subprocess 执行命令 process = subprocess.Popen(execute_command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) # 等待较长时间,例如 30 秒 timeout_seconds = 30 start_time = time.time() while time.time() - start_time < timeout_seconds: if process.poll() is not None:...
Event.wait([timeout]) : 堵塞线程,直到Event对象内部标识位被设为True或超时(如果提供了参数timeout)。 Event.set() :将标识位设为Ture Event.clear() : 将标识伴设为False。 Event.isSet() :判断标识位是否为Ture。 import threading def do(event): print('start') event.wait() print('execute') ev...
cursor.execute(sql_query) return cursor.fetchall() 通过这些实例,我们可以清楚地看到装饰器在实际项目中扮演着至关重要的角色,它们不仅帮助我们更好地组织代码,还增强了应用的安全性和性能。无论是Web框架中的路由映射、数据验证和权限控制,还是数据库操作与事务管理,装饰器都是提高代码可读性、可维护性及灵活性的...
(Step 1 — Defining a Function to Execute in Threads) Let’s start by defining a function that we’d like to execute with the help of threads. 让我们首先定义一个我们希望在线程帮助下执行的函数。 Using nano or your preferred text editor/development environment, you can open this file: ...
Event.wait([timeout]) : 堵塞线程,直到Event对象内部标识位被设为True或超时(如果提供了参数timeout) Event.set() :将标识位设为Ture Event.clear() : 将标识伴设为False Event.isSet() :判断标识位是否为Ture import threading def do(event): print('start') event.wait() print('execute') event_obj...
Execute the string 'cmd' in a shell with 'check_output' and return a 2-tuple (status, output). The locale encoding is used to decode the output and process newlines. cmd可以直接执行shell命令,而不需要cmd命令以列表输入---subprocess.getstatusoutput("cat /proc/meminfo") 返回...
lock1=threading.Lock()lock2=threading.Lock()defdeadlock_thread(id):ifid==1:lock1.acquire()print("线程1获得第一个锁")try:lock2.acquire(True,2)# 设置超时避免无限等待exceptthreading.LockTimeout:print("线程1获取第二个锁超时,避免了死锁")else:print("线程1获得了两个锁,正常执行")elifid==2...
defrun(self):time.sleep(2)print('%s say hello'%self.name)if__name__=='__main__':t=Sayhi('egon')t.start()print('主线程') 多线程与多进程 代码语言:javascript 代码运行次数:0 运行 AI代码解释 from threadingimportThread from multiprocessingimportProcessimportos ...