Add the ability to diff #286
Conversation
src/picosvg/geometric_types.py
Outdated
|
|
||
| def __add__(self, other: "Vector") -> "Point": | ||
| """Return Point translated by other Vector""" | ||
| if isinstance(other, Vector): | ||
| return self.__class__(self.x + other.x, self.y + other.y) | ||
| return NotImplemented | ||
| raise ValueError(f"Other must be a Vector, not a {type(other)}") |
There was a problem hiding this comment.
Changes here are due to typechecker complaining; I don't want the return type to be Point or NotImplemented
There was a problem hiding this comment.
but the canonical way to implement math operator overrides is exactly to return NotImplemented when the other type isn't among the ones which the current method is capable of handling, this enables the interpreter to check if the same operator is implemented by the other side of the expression, see https://docs.python.org/3/library/numbers.html#implementing-the-arithmetic-operations
I'm surprised that pytype doesn't automatically support this..
There was a problem hiding this comment.
there's even an explicit test for this in pytype test suite:
There was a problem hiding this comment.
Huh. TIL. I will revert this part.
|
"Add the ability to diff" -- before reading the code, I thought it was about diffing two svg files.. |
|
I wanted to colorize Ewert. Horrible hackery @ https://github.com/rsheeter/colorize. Haven't slapped gradients on it yet but I still quite like the result:
|
Handy when hacking on things