code: def all_ufuncs():
      ufunc_type = type(np.isnan)
      return (f for f in vars(np).values() if isinstance(f, ufunc_type))
  
imports: from itertools import product
  from operator import eq, ne
  import warnings
  import numpy
  from toolz import take
  from catalyst.lib.labelarray import LabelArray
  from catalyst.testing import check_arrays, parameter_space, CatalystTestCase
  from catalyst.testing.predicates import assert_equal
  from catalyst.utils.compat import unicode
label_desc: Use image node_id 2 for calling a global function with example usage: all_ufuncs() and returns: unknown