问题
As i've read in the sympy docs, the solve() command expects an equation to solve as being equal to zero.
As the equations i would like to solve are not in that form and in fact solving them for 0 is my purpose in using a library like sympy, is there a way to get around this?
回答1:
What the docs are saying is that if you do something like
>>> solve(x**2 - 1, x)
Then solve is implicitly assuming that x**2 - 1 is equal to 0. If you wanted to solve x**2 - 1 = 2, then you could either subtract 2 from both sides, to get
>>> solve(x**2 - 1 - 2, x)
or you could use the Eq() class
>>> solve(Eq(x**2 - 1, 2), x)
来源：https://stackoverflow.com/questions/12954552/sympys-solve-command-for-equations-0