Spectral slope functions (Sourcery refactored)

[sourcery-ai]

Pull Request #19 refactored by Sourcery.

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[sourcery-ai]

Function loudness_from_wav refactored with the following changes:

• Use set when checking membership of a collection of literals (collection-into-set)
• Simplify conditional into switch-like form (switch)

[sourcery-ai]

Sourcery Code Quality Report

Merging this PR leaves code quality unchanged.

Quality metrics	Before	After	Change
Complexity	10.76 🙂	10.76 🙂	0.00
Method Length	75.62 🙂	75.62 🙂	0.00
Working memory	12.16 😞	12.16 😞	0.00
Quality	48.71% 😞	48.71% 😞	0.00%

Other metrics	Before	After	Change
Lines	266	266	0

Changed files	Quality Before	Quality After	Quality Change
soundscapy/analysis.py	48.71% 😞	48.71% 😞	0.00%

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
soundscapy/analysis.py	loudness_from_wav	20 😞	257 ⛔	13 😞	31.83% 😞	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions
soundscapy/analysis.py	spectrogram_2ch	8 ⭐	214 ⛔	16 ⛔	40.56% 😞	Try splitting into smaller methods. Extract out complex expressions

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