既然__enter__和__exit__函数和with as语句紧密相连,那么__aenter__和__aexit__函数应用在异步场景中,就和async with as语句紧密相连。 1. 示例一:概述 import asyncio class Test(): def __init__(self): print("Init!") def __enter__(self): print("Enter!") def __exit__(self, type, ...
Theexit()function in Python stops the program from running. For example, in your program, after performing an operation, if you want to stop the program from executing at any point in time, you can use the exit() function. Here’s the syntax of the exit function in Python: It accepts ...
void _Py_NO_RETURN Py_Exit(int sts) { if (Py_FinalizeEx() < 0) { sts = 120; } exit(sts); } 可见,正常退出的时候,执行了清理操作,然后执行的是不带下划线的C里的exit函数,会执行比_exit更多的清理操作。 sys.excepthook sys.excepthook(type, value, traceback)This function prints out a g...
除了使用return语句跳出函数外,Python还提供了在任意位置跳出程序的方法。可以使用sys模块中的exit函数实现此目的。exit函数接受一个可选的退出码参数,如果没有提供,则默认为0。下面的代码演示了如何在函数内部使用sys.exit跳出整个程序: importsysdeffunction():# 执行一些操作ifcondition:sys.exit()# 执行一些其他操作...
python的程序有多种退出方式:os._exit(), sys.exit(),exit()/quit()。 1.2.1 sys.exit() Help on built-in function exit in module sys:在模块sys中,可以帮助内置函数退出的。 一般是退出Python程序的首选方法。该方法中包含一个参数status,默认为0,表示正常退出, 其他都是异常退出。
There are several commands you can use to exit a program in Python. Some of these commands include: The quit() function The exit() function The sys.exit() function The os._exit() function We will discuss each exit command in detail. The quit() Function The first Python exit command we...
(dist_name).entry_pointsifentry_point.group==group and entry_point.name==name)returnnext(matches).load()globals().setdefault('load_entry_point',importlib_load_entry_point)if__name__=='__main__':sys.argv[0]=re.sub(r'(-script\.pyw?|\.exe)?$','',sys.argv[0])sys.exit(load_...
def multi_return(): (tab)a = 10 (tab)b = 20 (tab)c = 30 (tab)return a, b, c 调用这个函数并获取返回值的方法如下:result = multi_return() print(result) # 输出 (10, 20, 30)提前结束函数:在函数中,可以使用return语句提前结束函数的执行,并返回一个值。例如:def early_exi...
# sys.exit()用法示例 def exit_function(value):print("sys.exit()捕获到的value是%s"%value)sys.exit(0)print("start sys")try:sys.exit(888)except SystemExitasvalue:exit_function(value=value)print("end sys") 1. 2. 3. 4. 5. 6. ...
elif"code"innext:print("OK, you have the code.")theobject="code"print("Now you must exit and go ahead.")opening()# Moved thefunctioncall before thereturnstatementreturntheobject defopening():print("You're in a Labrynthe.")print("There's a door on your left.")print("There's...