Cannot print CustomLabelEncoder: ValueError

[npatki]

Environment Details

• RDT version: 1.2.1 (latest)
• Python version: Any
• Operating System: Any

Error Description

There is an error any time the RDT library tries to print a CustomLabelEncoder. This affects my ability to inspect the config.

customers = get_demo()
ht.detect_initial_config(data=customers)
transformer = CustomLabelEncoder(order=['VISA', 'AMEX', 'DISCOVER', None], add_noise=True)
ht.update_transformers({'credit_card': transformer})

ht.get_config() # error
print(transformer) # same error

ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().

(See below for Stack trace)

Expected Output

It may be tricky to print all the values that the user has inputted as categories, especially if there are a lot of them and if there are a mix of types. The string representation can just include the word <CUSTOM> for now.

>>> transformer = CustomLabelEncoder(order=['a', 'b', 'c', 'd', 'e', 'f', 'g', True, False, None], add_noise=True)
>>> print(transformer)
CustomLabelEncoder(order=<CUSTOM>, add_noise=True)

Stack Trace

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
[/usr/local/lib/python3.8/dist-packages/IPython/core/formatters.py](https://localhost:8080/#) in __call__(self, obj)
    700                 type_pprinters=self.type_printers,
    701                 deferred_pprinters=self.deferred_printers)
--> 702             printer.pretty(obj)
    703             printer.flush()
    704             return stream.getvalue()

5 frames
[/usr/local/lib/python3.8/dist-packages/IPython/lib/pretty.py](https://localhost:8080/#) in pretty(self, obj)
    400                         if cls is not object \
    401                                 and callable(cls.__dict__.get('__repr__')):
--> 402                             return _repr_pprint(obj, self, cycle)
    403 
    404             return _default_pprint(obj, self, cycle)

[/usr/local/lib/python3.8/dist-packages/IPython/lib/pretty.py](https://localhost:8080/#) in _repr_pprint(obj, p, cycle)
    695     """A pprint that just redirects to the normal repr function."""
    696     # Find newlines and replace them with p.break_()
--> 697     output = repr(obj)
    698     for idx,output_line in enumerate(output.splitlines()):
    699         if idx:

[/usr/local/lib/python3.8/dist-packages/rdt/hyper_transformer.py](https://localhost:8080/#) in __repr__(self)
     20         config = {
     21             'sdtypes': self['sdtypes'],
---> 22             'transformers': {k: repr(v) for k, v in self['transformers'].items()}
     23         }
     24 

[/usr/local/lib/python3.8/dist-packages/rdt/hyper_transformer.py](https://localhost:8080/#) in <dictcomp>(.0)
     20         config = {
     21             'sdtypes': self['sdtypes'],
---> 22             'transformers': {k: repr(v) for k, v in self['transformers'].items()}
     23         }
     24 

[/usr/local/lib/python3.8/dist-packages/rdt/transformers/base.py](https://localhost:8080/#) in __repr__(self)
    211 
    212         for arg, value in instanced.items():
--> 213             if defaults[arg] != value:
    214                 custom_args.append(f'{arg}={repr(value)}')
    215 

[/usr/local/lib/python3.8/dist-packages/pandas/core/generic.py](https://localhost:8080/#) in __nonzero__(self)
   1535     @final
   1536     def __nonzero__(self):
-> 1537         raise ValueError(
   1538             f"The truth value of a {type(self).__name__} is ambiguous. "
   1539             "Use a.empty, a.bool(), a.item(), a.any() or a.all()."

ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().