parameters: (a, b)
return_statement: return a
docstring: Calculate the greatest common divisor of a and b
docstring_summary: Calculate the greatest common divisor of a and b
docstring_tokens: Calculate the greatest common divisor of a and b
function: def _gcd(a, b):
      """Calculate the greatest common divisor of a and b"""
      while b:
          a, b = b, a % b
      return a
function_tokens: def _gcd ( a , b ) : while b : a , b = b , a % b return a