Complete the Python packages and imports code

Importing the dotted module binds the package name so the submodule can be reached as shop.pricing.

Hint: Use import followed by the full dotted module name.

from shop import pricing binds the pricing submodule name in the current module.

Hint: Start with from, then the package, import, and the submodule name.

A single leading dot means the current package, so this imports the sibling pricing module.

Hint: Use a single leading dot to refer to the current package.

Names defined in __init__.py become part of the package namespace.

Hint: Assign a string to package_name.