New submission from chovey <cho...@sandia.gov>:
We used get/set attribute accessors with private data, and suspect the beaviour
we see with the += operator contains a bug. Below is our original
implementation, followed by our fix. But, we feel the original implementation
should have worked. Please advise. Thank you.
@property
def position(self) -> np.ndarray:
return self._position
@position.setter
def position(self, val: np.ndarray):
self._position = val
def update(self, *, delta_t: float):
# Nope! Bug! (?)
# Tried to combine the getter and setter for self.position
# with the += operator, which will not work.
# self.position += self.velocity * delta_t
#
# This fixes the behaviour.
self._position = self.velocity * delta_t + self.position
----------
components: 2to3 (2.x to 3.x conversion tool)
messages: 402966
nosy: chovey
priority: normal
severity: normal
status: open
title: += operator and accessors bug?
type: behavior
versions: Python 3.9
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue45333>
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