code: def isclose(a, b):
      rtol = 1e-5
      atol = 1e-8
      return abs(a - b) <= atol + rtol * abs(b)
  
imports: from sympy.external import import_module
  from sympy.testing.pytest import raises
  import ctypes
  import sympy
  from sympy.abc import a, b, n
label_desc: Use image node_id 1 for calling a global function with example usage: isclose(a, b) and returns: unknown