Is there a way to dynamically import Python objects?

Question

I'm trying to make a command handler, here's some code:

from importlib import import_module
from os import path, listdir

client.commands = [] # where the commands are stored
directory = '.\\src\\exec\\files'
for command in listdir(directory):
    filepath = path.join(directory, filename)
    if path.isdir(filepath) and 'lib' not in filepath: # check if file is a directory
        log_commands(directory=filepath) # make recursive logging

    elif filename.endswith('.py'):
        command_name = filename.split('\\')[-1]
        module_name = devutils.filepath2module(filepath, True, True) # convert file path to module path
        client_utils.commands[command_name] = import_module(module_name) # puts module in a new item

The code works fine, but the import_module function imports only the entire function. I was wondering if there's some library that imports specific objects from the module, like:

from module import object

But in a dynamic way, I searched a little bit and couldn't find anything. (Sorry for bad english)

You always import the entire module. You can choose to only extract a name from the global namespace, they type of the object is irrelevant — juanpa.arrivillaga
– juanpa.arrivillaga, Commented Jan 22, 2021 at 4:16

gilch · Accepted Answer · 2021-01-22 04:23:25Z

1

from module import foo is equivalent to foo = __import__('module').foo. It does have to run the whole file to create the module object.

But importlib.import_module is a bit easier to use (especially for submodules) so that would be

foo = import_module('module').foo

If the attribute access also needs to be dynamic, you can use getattr, so

def from_module_get(module_name, attr):
    return getattr(import_module(module_name), attr)

>>> from_module_get('math', 'tau')
6.283185307179586

edited Jan 22, 2021 at 4:23

answered Jan 22, 2021 at 4:11

gilch

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