PYTHON

python deep setter

from operator import attrgetter

def deep_setter(obj, aliases: list, value):
    """
    >>> class C():
    >>>    pass
 
    >>> class B():
    >>>    c = C()

    >>> class A():
    >>>    b = B()
    >>> a = A()
    >>> deep_setter(a, ["b", "c"], "test")
    >>> a.b.c
    'test'
    """
    if not isinstance(aliases, list):
        raise TypeError("Alias must be a list")
    if len(aliases) < 1:
        raise ValueError("Alias list must be longer then 0")
    if any(["." in el for el in aliases]):
        raise ValueError("Elements can not contain dots")
    if len(aliases) > 1:
        last = aliases.pop()
        dot_view = '.'.join(aliases)
        get_penult = attrgetter(dot_view)
        setattr(get_penult(obj), last, value)
    else:
        setattr(obj, aliases[0], value)