apipkg_lazy_loading_namespace_package_initialization.py

1import apipkg
2
3# The initpkg function sets up a lazy-loading dictionary for a package.
4# It maps attribute names to strings that specify the module and object to import.
5apipkg.initpkg('mypackage', {
6    'os': 'os',
7    'path': 'os.path',
8    'join': 'os.path:join',
9})
10
11# Accessing attributes triggers the actual import
12import mypackage
13
14# This will trigger the import of 'os'
15print(mypackage.os.name)
16
17# This will trigger the import of 'os.path'
18print(mypackage.path.sep)
19
20# This will trigger the import of 'os.path.join'
21print(mypackage.join("a", "b"))