Lazypimp

Lazypimp stands for lazy python import. It is a python package that allows you to setup an importing system that loads all imports on demand. This is useful for large projects where you don't want to load all the imports at once.

Installation

using pip:

pip install lazypimp

using conda:

conda install -c conda-forge lazypimp

Usage

Let's say we have a file structure as follows:

mymodule/
    __init__.py
    submod1.py
    submod2.py
    submod3.py
    subpackage/
        __init__.py
        submod4.py
    class1.py
    functions.py

And we want to have the following imports in the __init__.py file:

# imports of submodules
from mymodule import submod1, submod2, submod3 as sm3
from mymodule.subpackage import submod4

# imports of classes, functions, etc.
from mymodule.class1 import MyClass1
from mymodule.functions import my_function

To set up the module mymodule to load submodules on demand, we can use the following code:

from lazypimp import setup

all_modules_by_origin = {
    "mymodule": ["submod1", "submod2", {"sm3": "submod3"}], 
    "mymodule.subpackage": ["submod4"]
}

all_imports_by_origin = {
    "mymodule.class1": "MyClass1",
    "mymodule.functions": "my_function"
}

setup(__name__, all_modules_by_origin, all_imports_by_origin)