# Buggy code
def search_all_objects(cls, directory: Path) -> List[Dict[str, Any]]:
    """
    Searches a directory for valid objects
    :param directory: Path to search
    :return: List of dicts containing 'name', 'class' and 'location' entires
    """
    logger.debug(f"Searching for {cls.object_type.__name__} '{directory}'")
    objects = []
    for entry in directory.iterdir():
        # Only consider python files
        if not str(entry).endswith(".py"):
            logger.debug("Ignoring %s", entry)
            continue
        module_path = entry.resolve()
        logger.debug(f"Path {module_path}")
        for obj in cls._get_valid_object(module_path, object_name=None):
            objects.append(
                {
                    "name": obj.__name__,
                    "class": obj,
                    "location": entry,
                }
            )
    return objects


# Traceback (Exception)
2020-02-20 22:47:28,025 - freqtrade - ERROR - Fatal exception!
Traceback (most recent call last):
File "/opt/tradebot/freqtrade/.env/lib/python3.7/site-packages/talib/__init__.py", line 20, in wrapper
for arg in chain(args, kwargs.values())
StopIteration

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/freqtrade/freqtrade/main.py", line 36, in main
return_code = args['func'](args)
File "/freqtrade/freqtrade/commands/optimize_commands.py", line 76, in start_hyperopt
hyperopt.start()
File "/freqtrade/freqtrade/optimize/hyperopt.py", line 488, in start
preprocessed = self.backtesting.strategy.tickerdata_to_dataframe(data)
File "/freqtrade/freqtrade/strategy/interface.py", line 448, in tickerdata_to_dataframe
for pair, pair_data in tickerdata.items()}
File "/freqtrade/freqtrade/strategy/interface.py", line 448, in <dictcomp>
for pair, pair_data in tickerdata.items()}
File "/freqtrade/freqtrade/strategy/interface.py", line 464, in advise_indicators
return self.populate_indicators(dataframe, metadata)
File "/freqtrade/user_data/strategies/MyDev.py", line 205, in populate_indicators
dataframe['mfi'] = ta.MFI(dataframe)
File "talib/_abstract.pxi", line 352, in talib._ta_lib.Function.__call__
File "talib/_abstract.pxi", line 383, in talib._ta_lib.Function.__call_function
File "/opt/tradebot/freqtrade/.env/lib/python3.7/site-packages/talib/__init__.py", line 24, in wrapper
return func(*args, **kwargs)
File "talib/_func.pxi", line 8454, in talib._ta_lib.MFI
Exception: volume is not double

# Fixed code
def search_all_objects(cls, directory: Path, enum_failed: bool) -> List[Dict[str, Any]]:
    """
    Searches a directory for valid objects
    :param directory: Path to search
    :param enum_failed: If True, will return None for modules which fail.
        Otherwise, failing modules are skipped.
    :return: List of dicts containing 'name', 'class' and 'location' entires
    """
    logger.debug(f"Searching for {cls.object_type.__name__} '{directory}'")
    objects = []
    for entry in directory.iterdir():
        # Only consider python files
        if not str(entry).endswith(".py"):
            logger.debug("Ignoring %s", entry)
            continue
        module_path = entry.resolve()
        logger.debug(f"Path {module_path}")
        for obj in cls._get_valid_object(
            module_path, object_name=None, enum_failed=enum_failed
        ):
            objects.append(
                {
                    "name": obj.__name__ if obj is not None else "",
                    "class": obj,
                    "location": entry,
                }
            )
    return objects