kartothek.utils.converters module¶

Helper module to convert user inputs into normalized forms.

kartothek.utils.converters.converter_str(obj) → str [source]¶

Ensures input is a unicode string.

kartothek.utils.converters.converter_str_set(obj) → frozenset [source]¶

Convert input to a set of unicode strings. None will be converted to an empty set.

Parameters: obj (Optional[Union[Iterable[str], str]]) – Object to convert.
Returns: obj – String set.
Return type: FrozenSet[str]
Raises: TypeError – If passed object is not string/byte-like.

kartothek.utils.converters.converter_str_set_optional(obj)[source]¶

Convert input to a set of unicode strings. None will be preserved.

Parameters: obj (Optional[Union[Iterable[str], str]]) – Object to convert.
Returns: obj – String set.
Return type: Optional[FrozenSet[str]]
Raises: ValueError – If an element in the passed object is not string/byte/like.

kartothek.utils.converters.converter_str_tupleset(obj: Optional[Union[Iterable[str], str]]) → Tuple[str, …][source]¶

Convert input to tuple of unique unicode strings. None will be converted to an empty set.

The input must not contain duplicate entries.

Parameters

obj – Object to convert.

Raises

TypeError – If passed object is not string/byte-like, or if obj is known to have an unstable iteration order.
ValueError – If passed set contains duplicates.

kartothek.utils.converters.converter_tuple(obj) → tuple [source]¶

Convert input to a tuple. None will be converted to an empty tuple.

kartothek.utils.converters.get_str_to_python_converter(pa_type)[source]¶

Get converter to parse string into python object.