When an end-of-line character ( such as a newline character) is read, the Python interpreter advances to the next line and continues until there are no more lines of code. 当读到一个行结束符(比如换行符)时,Python解释器就前进到下一行并继续,直到没有了代码行。
The global namespace for a module is created when the module definition is read in; normally, module namespaces also last until the interpreter quits. 模块的全局命名空间在模块定义被读入时创建,通常,模块命名空间也会一直保存到解释器退出。