Equation solver in Python
Given a simple equation such as:
x = y + z
You can get the third variable if you bind the other two (ie: y = x - z
and z = x - y
). A straightforward way to put this in code:
def solve(args):
if 'x' not in args:
return args['y'] + args['z']
elif 'z' not in args:
return args['x'] - args['y']
eli开发者_StackOverflow中文版f 'y' not in args:
return args['x'] - args['z']
else:
raise SomeError
I obviously can take an equation, parse it and simplify it to achieve the same effect. But I believe in doing so I would be re-inventing the wheel. So where's my ready-made wheel?
Consider using Sympy. It includes various tools to solve equations and a lot more.
The following is an excerpt from the docs:
>>> from sympy import I, solve
>>> from sympy.abc import x, y
>>> solve(x**4-1, x)
[1, -1, -I, I]
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