CODEWITHSUNDEEP
python
Rocky.L
Rocky.L

Reputation: 59

How to use alias of a long python module package without really importing it?

I need to import several modules from a long name module path:

import a.b.c.d.m1 as m1
import a.b.c.d.m2 as m2
import a.b.c.d.m3 as m3

I can write the long name only once, like this:

import a.b.c.d as d
m1 = d.m1
m2 = d.m2
m3 = d.m3

But in this way, the package d is fully imported, which I do not want.

Is there a way that just use something to 'remember' the module path, without really import it. Therefore, later we can easily import its sub modules.

alias d = a.b.c.d
from d import m1
from d import m2
from d import m3

Upvotes: 0

Views: 327

Answers (2)

paradocslover
paradocslover

Reputation: 3294

From the part that I have perceived from your question, it seems that you need something like this:

from a.b.c.d import m1,m2,m3

Why to use complicated stuff when commas can do the job?

Upvotes: 2

Serge Ballesta
Serge Ballesta

Reputation: 149075

Hmm, what to mean by

the package d is fully imported, which I do not want

When you execute 

from a.b.c.d import m1

The import machinery does import all the parent packages, meaning here a, a.b, a.b.c, a.b.c.d, adds them to the sys.module cache and only adds m1 to your global variables list.

So if you write:

from a.b.c import d
from d import m1

you import the same packages and only add a d reference to your global variable list, when you compare to the previous case.

So the alias machinery that you want is not included in the language simply because it was not felt useful enough.

Upvotes: 0

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