Python importlib's analogue for imp.new_module()

Question

PyCharm shows me that imp is deprecated so I wonder if there any analogue of imp.new_module for importlib.

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Answer 1

Quoting from documentation (Emphasis mine) –

imp.new_module(name)

Return a new empty module object called name. This object is not inserted in sys.modules.

Deprecated since version 3.4: Use types.ModuleType instead.

Example –

>>> import types
>>> types.ModuleType('name')
<module 'name'>

To show how they are synonymous –

>>> import imp
>>> imp.new_module('name')
<module 'name'>

Answered By: Anand S Kumar

Answer 2

Python documentation suggests to us:

Note Use importlib.util.module_from_spec() to create a new module if
you wish to set the various import-controlled attributes.

importlib.util.module_from_spec(spec) is preferred over using types.ModuleType to create a new module as spec is used to set as many import-controlled attributes on the module as possible.

To import a Python source file directly, we can use the following snippet:

import importlib.util
import sys


spec = importlib.util.spec_from_file_location(module_name, file_path)
module = importlib.util.module_from_spec(spec)
sys.modules[module_name] = module
spec.loader.exec_module(module)

The example below, we can use to implement lazy imports:

import importlib.util
import sys

def lazy_import(name):
    spec = importlib.util.find_spec(name)
    loader = importlib.util.LazyLoader(spec.loader)
    spec.loader = loader
    module = importlib.util.module_from_spec(spec)
    sys.modules[name] = module
    loader.exec_module(module)
    return module

>>> lazy_typing = lazy_import("typing")
>>> #lazy_typing is a real module object,
>>> #but it is not loaded in memory yet.
>>> lazy_typing.TYPE_CHECKING
False

Answered By: NKSM

Python importlib's analogue for imp.new_module()

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