Replace ** with Math.pow in SymPy

问题

I have a SymPy expression in Python and I would like to copy and paste it into a Java source code. Problem is that there’s a different notation for exponentiation:

• Java uses Math.pow(a,b);
• Python uses a**b.

So my question is: Is there a way how to print the SymPy expression in the “Java format”?

回答1:

SymPy has several code printers that are intended specifically for such a purpose. While there is no Java code printer, there is one for Javascript. I cannot say whether Java and Javascript are sufficiently similar for every purpose, but exponentiation is printed the way you want it:

import sympy

a,b = sympy.symbols("a, b")

print(sympy.printing.jscode(a**b)) 
# 'Math.pow(a, b)'

来源：https://stackoverflow.com/questions/41675777/replace-with-math-pow-in-sympy