code: def check_close(a, b, atol=1e-4, rtol=1e-4):
      assert abs(a - b) < atol + rtol * abs(b), "Diffs are: {0}".format(
          a - b
      )
  
imports: from __future__ import absolute_import
  import warnings
  from autograd.core import make_vjp
  from autograd.wrap_util import unary_to_nary
label_desc: Use image node_id 3 for calling a global function with example usage: check_close(a, b, atol, rtol) without return types