找到一个容易取出的符号结果

Question

sympy给出的结果如下：

Ellipse(Point(0,0),3,2)
Point(2.875, -0.661437827706861)

如果我想拿起这些数字：0,0,3,2,2.875...有什么简单的方法可以得到它们吗？

Answer 1

>>> from sympy import Ellipse, Point
>>> e = Ellipse(Point(0, 0), 3, 2)
>>> p, maj, min_ = e.args
>>> maj
3
>>> p
Point(0, 0)
>>> x, y = p.args
>>> x
0

Answer 2

如果你只想要数字，你可以用atoms（Number）得到它们：

>>> Point(2.875, -0.661437827706861).atoms(Number)
set([-661437827706861/1000000000000000, 23/8])
>>> Ellipse(Point(0, 0), 3, 2).atoms(Number)
set([0, 2, 3])
>>> Tuple(Point(2.875, -0.661437827706861), Ellipse(Point(0, 0), 3, 2)).atoms(
... Number)
set([0, 2, 3, -661437827706861/1000000000000000, 23/8])