code: def is_negative(x):
      return sign(x) < 0
  
file_path: catboost/contrib/python/hypothesis/py2/hypothesis/internal/floats.py
imports: from __future__ import absolute_import, division, print_function
  import math
  from hypothesis.internal.compat import CAN_PACK_HALF_FLOAT, quiet_raise, struct_pack, struct_unpack
label_desc: Use image node_id 4 for calling a global function with example usage: is_negative(x) and returns: unknown