code: def test_as_numer_denom(self):
      x = as_symbol("x")
      y = as_symbol("y")
      n = as_number(123)
  
      assert as_numer_denom(x) == (x, as_number(1))
      assert as_numer_denom(x / n) == (x, n)
      assert as_numer_denom(n / x) == (n, x)
      assert as_numer_denom(x / y) == (x, y)
      assert as_numer_denom(x * y) == (x * y, as_number(1))
      assert as_numer_denom(n + x / y) == (x + n * y, y)
      assert as_numer_denom(n + x / (y - x / n)) == (
          y * n**2,
          y * n - x,
      )
  
file_path: numpy/numpy/f2py/tests/test_symbolic.py
imports: import pytest
  from numpy.f2py.symbolic import Expr, Op, ArithOp, Language, as_symbol, as_number, as_string, as_array, as_complex, as_terms, as_factors, eliminate_quotes, insert_quotes, fromstring, as_expr, as_apply, as_numer_denom, as_ternary, as_ref, as_deref, normalize, as_eq, as_ne, as_lt, as_gt, as_le, as_ge
  from .None import util
label_desc: Use image node_id 10 for calling the TestSymbolic obj's underlying member method code with example usage: obj.test_as_numer_denom() without return types