How modules work in Python

[Abdul Abdul]

Hello,

I'm new to Python, and just have a small question, and thought you might
have an idea on it.

I came across the following example that uses the Python Imaging Library
(PIL):

from PIL import Image
img = Image.open('xyz.jpg')

I know that PIL is a module. And, I think that Image is also a module,
especially we are importing it.

I also understood the Image,open() part, as it appears we are using the
method open() from the Image module.

My question is, where did PIL go here? Can a module have another module
inside it?

Thanks.
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