Python dataclass from dict

The standard library in 3.7 can recursively convert a dataclass into a dict (example from the docs):

@dataclass
class Point:
     x: int
     y: int

@dataclass
class C:
     mylist: List[Point]

p = Point(10, 20)
assert asdict(p) == {'x': 10, 'y': 20}

c = C([Point(0, 0), Point(10, 4)])
tmp = {'mylist': [{'x': 0, 'y': 0}, {'x': 10, 'y': 4}]}
assert asdict(c) == tmp

I am looking for a way to turn a dict back into a dataclass when there is nesting. Something like C(**tmp) only works if the fields of the data class are simple types and not themselves dataclasses. I am familiar with jsonpickle, which however comes with a prominent security warning.

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