class_docstr: Integer ring based on Python's ``int`` type.
  
  This will be used as :ref:`ZZ` if ``gmpy`` and ``gmpy2`` are not
  installed. Elements are instances of the standard Python ``int`` type.
docstr: Compute GCD of ``a`` and ``b``. 
docstr_tok: ["Compute","GCD","of","``","a","``","and","``","b","``","."]
code: def gcd(self, a, b):
      """Compute GCD of ``a`` and ``b``."""
      return python_gcd(a, b)
  
imports: from sympy.core.numbers import int_valued
  from sympy.polys.domains.groundtypes import PythonInteger, SymPyInteger, sqrt, factorial, python_gcdex, python_gcd, python_lcm
  from sympy.polys.domains.integerring import IntegerRing
  from sympy.polys.polyerrors import CoercionFailed
  from sympy.utilities import public
label_desc: Use image node_id 13 for calling the PythonIntegerRing obj's underlying member method code with example usage: obj.gcd(a, b) and returns: python_gcd