Program reads the arguments Arguments passed to main function Execution Main function processes the arguments Python main function parameter passing 四、序列图示例 为进一步理解函数调用和参数传递的顺序,我们可以使用序列图: MainFunctionProgramUserMainFunctionProgramUserRun script with argumentsParse sys.argvCall...
Some programming languages have a special function calledmain()which is the execution point for a program file. Python interpreter, however, runs each line serially from the top of the file and has no explicitmain()function. Python offers other conventions to define the execution point. One of ...
在DOS命令行进入Python安装路径的Scripts文件夹 执行: python pyinstaller-script.py D:\Y_Script\regulatory_labels_version2\labels_main.py (把D:\Y_Script\regulatory_labels_version2\labels_main.py替换成自己需要打包的文件即可) 如果需要引用第三方库,而你想把自己整个环境打包,那么可以把整个site-packages打包...
/usr/bin/python # -*- coding: UTF-8 -*- def runoob2(): print "I'm in runoob2"现在，在package_runoob目录下创建__init__.py：package_runoob/__init__.py#!/usr/bin/python# -*- coding: UTF-8 -*-if __name__ == '__main__':print ('作为主程序运行')else:print ('package_run...
function函数的输入只有一个int型数值,这里要注意的是,在使用threading.Thread()传参时,arg需要传入一个元组,所以输入的是(i,),也就是说要加个逗号,。因为type((i))是<class 'int'>。 例子2:函数传入参数同时包含浮点型和字符串型数值时 Copy importthreading# 定义一个线程函数,接受浮点型和字符串型参数def...
Note python has this really weird error if you define local variable in a function same name as the global variable, program will promptUnboundLocalError. child class object overrides parent class methods input: classfruit:defprint(self):print('a')defeat(self):print('b')classapple(fruit):defpr...
map(function,argument):这以异步模式执行参数的函数。 shutdown(Wait=True):这表示执行器释放任何资源。 执行器通过它们的子类访问:ThreadPoolExecutor或ProcessPoolExecutor。因为实例化线程和进程是一个资源密集型的任务,最好将这些资源池化并将它们用作可重复启动器或执行器(因此是Executors概念)以用于并行或并发任务...
main.pyimportmath_functionsprint(math_functions.square(5))print(math_functions.cube(5))运行main.py...
int main(){ return 0; } This example shows a minimal amount of C code necessary for the file to compile with gcc without any warnings. It has a main() function that returns an integer. When this program runs, the operating system will interpret its execution as successful since it retu...
对于py 文件,Python 虚拟机会先对py 文件进行编译产生PyCodeObject 对象,然后执行了co_code 字节码,即通过执行def、class 等语句创建PyFunctionObject、PyClassObject 等对象,最后得到一个从符号映射到对象的dict,自然也就是所创建的module 对象中维护的那个dict。