This module provides functions to manipulate packages: Extend
the search path for the modules which comprise a package.
Intended use is to place the following code in a package’s
__init__.py: from pkgutil import extend_path __path__ =
extend_path(__path__, __name__) This will add to the package’s
__path__ all subdirectories of directories on sys.path named
after the package. This is useful if one wants to distribute
different parts of a single logical package as multiple
directories. It also looks for *.pkg files beginning where *
matches the name argument. This feature is similar to *.pth
files (see the site module for more information), except that it
doesn’t special-case lines starting with import. A *.pkg file is
trusted at face value: apart from checking for duplicates, all
entries found in a *.pkg file are added to the path, regardless
of whether they exist on the filesystem. (This is a feature.) If
the input path is not a list (as is the case for frozen
packages) it is returned unchanged. The input pat