Python Programming

In the previous lesson, you have seen how a Python module is simply a script that you can import and use.

Let’s say you have now created a large collection of useful modules, each in a separate file, all in a single folder. That must be quite a mess!

main.py
sound/
      formats/
              wavread.py
              wavwrite.py
              ...
      effects/
              echo.py
              surround.py
              ...
      filters/
              equalizer.py
              vocoder.py
              ...

You can access your highly organised modules from main.py by importing them as usual, using dot notation to get to your module.

In the example below, assume that there is:

• a generate_surround() function defined in surround.py
• a WavWriter class defined in wavread.py
• a SoundEqualizer class defined in equalizer.py

Notice how much you have to write in your code depending on how you import the packages!

import sound.formats.wavread
import sound.effects.surround
import sound.formats.wavwrite as ww
from sound.filters.equalizer import SoundEqualizer

surround = sound.effects.surround.get_surround()
writer = ww.WavWriter()
sound_eq = SoundEqualizer()