code: def _valfrommode(mode):
      try:
          return _modedict[mode]
      except KeyError:
          raise ValueError(
              "Acceptable mode flags are 'valid'," " 'same', or 'full'."
          )
  
file_path: cusignal/python/cusignal/convolution/convolution_utils.py
imports: import timeit
  import cupy
  import numpy
label_desc: Use image node_id 7 for calling a global function with example usage: _valfrommode(mode) and returns: _modedict