jsons.deserializers.default_complex.default_complex_deserializer()

Complexity

Conditions

4

Size

Total Lines	22
Code Lines	14

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

from typing import Dict
def default_complex_deserializer(obj: Dict[str, float],
                                 cls: type = complex,
                                 **kwargs) -> complex:
    """
    Deserialize a dictionary with 'real' and 'imag' keys to a complex number.
    :param obj: the dict that is to be deserialized.
    :param cls: not used.
    :param kwargs: not used.
    :return: an instance of ``complex``.
    """
    real = obj.get('real')
    imag = obj.get('imag')
    clean_obj = {'real': real, 'imag': imag}
    for key, value in clean_obj.items():
        if not value:
            raise AttributeError(f"Cannot deserialize {obj} to a complex number, does not contain key '{key}'")
        try:
            float(value)
        except TypeError:
            raise AttributeError(f"Cannot deserialize {obj} to a complex number, can't cast value of '{key}' to float")

    return complex(real, imag)