Dynamic import of several names from a module

Question

I am trying to import some symbols from one package into another. I have tried the following, with no luck as both are syntax errors.

from signal import SIG*

or

import _signal
import _re
from signal import [i for i in dir(_signal) if _re.search("^SIG",i)!=None ]

Is there a way to do this.

What makes you think that syntax would work?

Martijn Pieters
– Martijn Pieters

2012-11-06 10:56:14 +00:00
Commented Nov 6, 2012 at 10:56 — Martijn Pieters
– Martijn Pieters, Commented Nov 6, 2012 at 10:56

Martijn Pieters · Accepted Answer · 2012-11-06 11:34:02Z

7

Use importlib:

import importlib

mod = importlib.import_module('signal')
loc = locals()
for name in dir(mod):
    if name.startswith('SIG'):
        loc[name] = getattr(mod, name)
del mod, loc, importlib

edited Nov 6, 2012 at 11:34

answered Nov 6, 2012 at 10:59

Martijn Pieters

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2 Comments

halex Over a year ago

In the documentation for locals() there is the note:

The contents of this dictionary should not be modified; changes may not affect the values of local and free variables used by the interpreter.

Is it safe in your case and what would be an alternative?

Martijn Pieters Over a year ago

@halex: It's safe in this case, but if it makes you feel better you can substitute it with globals(); at module scope they are one and the same object anyway. :-)

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