Use __init__(_gcd=False) instead of new in PythonRational.__pow__
Use __init__(_gcd=False) instead of new in PythonRational.__pow__

The former also works if the input is a SymPy type, which is possible if the
exponent is an Integer or Rational.

kaushik94/sympy,kaushik94/sympy,kaushik94/sympy