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Computer Science

Consider the following package

music/                        Top-level package
 ├── __init__.py
 ├── formats/                 Subpackage for file format
 │      ├── __init__.py
 │      └── wavread.py
 │      └── wavwrite.py
 │
 ├── effects/                 Subpackage for sound effects
 │      └── __init__.py
 │      └── echo.py
 │      └── surround.py
 │      └── reverse.py
 │
 └── filters/                 Subpackage for filters
     ├── __init__.py
     └── equalizer.py
     └── vocoder.py
     └── karaoke.py

Each of the above modules contain functions play(), writefile() and readfile().

(a) If the module wavwrite is imported using command import music.formats.wavwrite. How will you invoke its writefile() function ? Write command for it.

(b) If the module wavwrite is imported using command from music.formats import wavwrite. How will you invoke its writefile() function ? Write command for it.

Python Libraries

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Answer

(a) If the module wavwrite is imported using the command import music.formats.wavwrite, we can invoke its writefile() function by using the module name followed by the function name:

import music.formats.wavwrite
music.formats.wavwrite.writefile()

(b) If the module wavwrite is imported using the command from music.formats import wavwrite, we can directly invoke its writefile() function without prefixing the module name:

from music.formats import wavwrite
writefile()

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