转载

Python reference note4 - The import system

13 Jul 2015
  • the import statement combines two operations; it searchs for the named module, then it bind the result of that search to a name in the local scope. the search operation of the import statement is defined as a call to the __import__() funtion, with the appropriate arguments. the return value of __import__() is used to perform the name binding operation of the import statement.

  • it's important to keep in mind that all packages are modules, but not all modules are packages.

  • namespce package. ** what the hell, man **

  • the first place checked during import search is sys.module . this mapping serves as a cache of all modules that have been previously imported, including the intermediate paths(e.g. foo.bar.baz -> foo , foo.bar , foo.bar.baz ).

  • if you keep a reference to the module object, invalidate its cache entry in sys.modules , and then re-import the named module. the two module objects will not be the same.

  • __spec__ need reread. (what's the usage of it?)

转载的话就看不到更新了 :/

支持作者, 请您注册digitalocean的时候用 这个链接 , 这样您也可以得到$10!

正文到此结束
Loading...