class ControllerError(StandardError): pass
class InterpreterError(StandardError): pass

class CytoplasmError(Exception): pass
class ControllerError(CytoplasmError): pass
class InterpreterError(CytoplasmError): pass

Use Exception instead of StandardError
Use Exception instead of StandardError

Python 3 doesn't have StandardError...

+ class CytoplasmError(Exception): pass
- class ControllerError(StandardError): pass
+ class ControllerError(CytoplasmError): pass
- class InterpreterError(StandardError): pass
+ class InterpreterError(CytoplasmError): pass
  
Use Exception instead of StandardError
## Code Before:
class ControllerError(StandardError): pass
class InterpreterError(StandardError): pass

## Instruction:
Use Exception instead of StandardError
## Code After:
class CytoplasmError(Exception): pass
class ControllerError(CytoplasmError): pass
class InterpreterError(CytoplasmError): pass
