How to Sorted and display the Subclasses of BaseException

[Fernando_7obink]

I have a task from the online course that i enrolled free recently , can anyone help me for sorting the printout from the line code as follow :

def printExcTree(thisclass, nest = 0):
    if nest > 1:
        print("   |" * (nest - 1), end="")
    if nest > 0:
        print("   +---", end="")

    print(thisclass.__name__)

    for subclass in thisclass.__subclasses__():
        printExcTree(subclass, nest + 1)

printExcTree(BaseException)

and here is the output :

Output:
BaseException
   +---Exception
   |   +---TypeError
   |   +---StopAsyncIteration
   |   +---StopIteration
   |   +---ImportError
   |   |   +---ModuleNotFoundError
   |   |   +---ZipImportError
   |   +---OSError
   |   |   +---ConnectionError
   |   |   |   +---BrokenPipeError
   |   |   |   +---ConnectionAbortedError
   |   |   |   +---ConnectionRefusedError
   |   |   |   +---ConnectionResetError
   |   |   +---BlockingIOError
   |   |   +---ChildProcessError
   |   |   +---FileExistsError
   |   |   +---FileNotFoundError
   |   |   +---IsADirectoryError
   |   |   +---NotADirectoryError
   |   |   +---InterruptedError
   |   |   +---PermissionError
   |   |   +---ProcessLookupError
   |   |   +---TimeoutError
   |   |   +---UnsupportedOperation
   |   |   +---herror
   |   |   +---gaierror
   |   |   +---timeout
   |   |   +---Error
   |   |   |   +---SameFileError
   |   |   +---SpecialFileError
   |   |   +---ExecError
   |   |   +---ReadError
   |   +---EOFError
   |   +---RuntimeError
   |   |   +---RecursionError
   |   |   +---NotImplementedError
   |   |   +---_DeadlockError
   |   |   +---BrokenBarrierError
   |   +---NameError
   |   |   +---UnboundLocalError
   |   +---AttributeError
   |   +---SyntaxError
   |   |   +---IndentationError
   |   |   |   +---TabError
   |   +---LookupError
   |   |   +---IndexError
   |   |   +---KeyError
   |   |   +---CodecRegistryError
   |   +---ValueError
   |   |   +---UnicodeError
   |   |   |   +---UnicodeEncodeError
   |   |   |   +---UnicodeDecodeError
   |   |   |   +---UnicodeTranslateError
   |   |   +---UnsupportedOperation
   |   +---AssertionError
   |   +---ArithmeticError
   |   |   +---FloatingPointError
   |   |   +---OverflowError
   |   |   +---ZeroDivisionError
   |   +---SystemError
   |   |   +---CodecRegistryError
   |   +---ReferenceError
   |   +---BufferError
   |   +---MemoryError
   |   +---Warning
   |   |   +---UserWarning
   |   |   +---DeprecationWarning
   |   |   +---PendingDeprecationWarning
   |   |   +---SyntaxWarning
   |   |   +---RuntimeWarning
   |   |   +---FutureWarning
   |   |   +---ImportWarning
   |   |   +---UnicodeWarning
   |   |   +---BytesWarning
   |   |   +---ResourceWarning
   |   +---error
   |   +---Verbose
   |   +---Error
   |   +---TokenError
   |   +---StopTokenizing
   |   +---Empty
   |   +---Full
   |   +---_OptionError
   |   +---TclError
   |   +---SubprocessError
   |   |   +---CalledProcessError
   |   |   +---TimeoutExpired
   |   +---Error
   |   |   +---NoSectionError
   |   |   +---DuplicateSectionError
   |   |   +---DuplicateOptionError
   |   |   +---NoOptionError
   |   |   +---InterpolationError
   |   |   |   +---InterpolationMissingOptionError
   |   |   |   +---InterpolationSyntaxError
   |   |   |   +---InterpolationDepthError
   |   |   +---ParsingError
   |   |   |   +---MissingSectionHeaderError
   |   +---InvalidConfigType
   |   +---InvalidConfigSet
   |   +---InvalidFgBg
   |   +---InvalidTheme
   |   +---EndOfBlock
   |   +---BdbQuit
   |   +---error
   |   +---_Stop
   |   +---PickleError
   |   |   +---PicklingError
   |   |   +---UnpicklingError
   |   +---_GiveupOnSendfile
   |   +---error
   |   +---LZMAError
   |   +---RegistryError
   |   +---ErrorDuringImport
   +---GeneratorExit
   +---SystemExit
   +---KeyboardInterrupt

what i want to do is to sort every subclass depend on his first letter alphabetly and the subclass from every subclass follow the same rule...