在 python 中，我应该生成什么代码来执行“从文件导入 *”？

Question

I'm working on the pythonizer , a program to translate perl to python, and I'm looking to translate the statement "require FILENAME;" to python. In this case I need to generate "from FILENAME import *". I figured out the "from FILENAME" part (here BASENAME is the FILENAME without the path or extension):

from importlib.machinery import SourceFileLoader
module = SourceFileLoader(BASENAME, FILENAME).load_module()

and the import * part is coded as:

__import__(name, fromlist=['*'])

but how do I combine them?

I see _handle_fromlist in importlib._bootstrap , but calling an internal routine is most likely not the right answer here.

Answer 1

Here is my second thought about implementing this:

[_p, _m] = _prep_import(FILENAME)
sys.path[0:0] = _p
__import__(_m, fromlist=['*'])
sys.path.pop(0)

Where _prep_import() looks at the FILENAME (which may be an expression), removes any extension, grabs any path info from it into the first result, and leaves the basename as the second result. Note that the FILENAME may contain dashes ( - ), and I believe __import__ is OK with that.