PEP 8 Deprecation Warnings

[cyschneck]

PEP 8 Update

Update function and variables names to adhere to PEP 8 style guides. Backwards compatibility maintained with FutureWarning when using original function/variable names that will eventually be dropped

• Group imports in alphabetical ordered groups (standard library imports, related third party imports, local specific imports
• Class names use CamelCase convention
• Function names are lowercase and snakecase
• Backend function names preceded by underscore

[codecov]

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