Refactor: python: Improve componentfail.py.

• Disable pylint warnings we can't really do anything about.

• Simplify how the patterns lists are built. In one spot, use copy() to make it more obvious what is happening in the code.

• Rename most attributes to use a leading underscore, since they are private.

• Rename all methods to be private and follow python naming conventions.

• Use %r instead of repr in format strings.

• Get rid of unnecessary elif statements.