Pythonecho.py 1defecho(text:str,repetitions:int=3)->str:2"""Imitate a real-world echo."""3echoes=[text[-i:].lower()foriinrange(repetitions,0,-1)]4return"\n".join(echoes+["."])56if__name__=="__main__":7text=input("Yell something at a mountain: ")8print(echo(text)) ...
1# Threading example 2import time 3import thread 4 5def myfunction(string, sleeptime, lock, *args): 6 while True: 7 lock.acquire() 8 time.sleep(sleeptime) 9 lock.release() 10 time.sleep(sleeptime) 11 12if __name__ == "__main__": 13 lock = thread.allocate_lock() 14 thread.st...
Open Compiler import sys def main(args): print(args) if __name__ == "__main__": main(sys.argv) OutputFollowing is the output of the above executed program ?['main.py'] As you can see, the Python program's first argument is the name of the .py file itself....
Today, let’s discuss something that’s all over the place in many code bases: what doesif __name__ == '__main__'do in Python? The statementif __name__ == '__main__':checks if variable__name__is set to the string value'__main__'which holds only within the main source fil...
def main(): # code to be executed if __name__ == "__main__": main() In this example, the main() function will be executed only if the file containing it is being run as the main program. If the file is being imported as a module into another program, the main() function wi...
def generate_seq(): for i in range(1, 11): yield i for number in generate_seq(): print(number) # The output is number from 1 to 11 2. Using yield to Iterate Over Data Streams in Python Let’s say you have a stream of data, a file stream, where you want to read the file ...
What does Python's'if name equals main'construct do? Python'sif __name__ == "__main__":construct enables a single Python file to not only support reusable code and functions, but also contain executable code that will not explicitly run when a module is imported. ...
If that code is being imported into another module, the various function and class definitions will be imported, but themain()code won't get run. As a basic example, consider the following two scripts: 1#file one.py2deffunc():3print("func() in one.py")45print("top-level in one.py...
python threading_example.py 1. 设置特殊变量后, 它将执行导入语句并加载这些模块。然后, 它将计算def块, 创建一个函数对象, 并创建一个名为myfunction的变量, 指向该函数对象。然后, 它将读取if语句, 并看到__name__确实等于"__main__", 因此它将执行显示在其中的代码块。
Python does this in constant time without having to scan through every item by using hash functions. When Python looks up a key foo in a dict, it first computes hash(foo) (which runs in constant-time). Since in Python it is required that objects that compare equal also have the same ...