**Before**
This prevents directories with a common name, such as ``string``, unintentionally hiding ...
**After**
This prevents directories with a common name, such as ``string``, from unintentionally hiding ...
The :file:`__init__.py` files are required to make Python treat directories
containing the file as packages. This prevents directories with a common name,
-such as ``string``, unintentionally hiding valid modules that occur later
+such as ``string``, from unintentionally hiding valid modules that occur later
on the module search path. In the simplest case, :file:`__init__.py` can just be
an empty file, but it can also execute initialization code for the package or
set the ``__all__`` variable, described later.