Modules
Modules are single Python files that can be imported. Any python file
can be a module. For example, if I have two Python files:
module.py and hello.py in the same directory:
# module.py
def hello(name):
print("Hello {}".format(name))
I can import that module in my hello.py:
#hello.py
import module
module.hello("World!") # Hello World!
The same can be done in the interpreter:
>>> from module import hello
>>> hello("World!") # Hello World!
Packages
Packages are made up of multiple Python files (or modules), and can even
include libraries written in different languages like C or C++. Seeing
an __init.py__ file in a folder typically tells you that
that folder is a Python package. The __init__.py doesn't
have to contain any code – sometimes it does – it just has to be there
for Python take that particular folder as a package.
📁 my_package
|- __init__.py
|- module.py
# __init.py__
from my_package.module import hello
When you import my_package in your script, the
__init__.py script will be run, giving you access to all of
the functions in the package. In this case, it only gives access to the
module.hello function.