code: def _bvalfromboundary(boundary):
      try:
          return _boundarydict[boundary] << 2
      except KeyError:
          raise ValueError(
              "Acceptable boundary flags are 'fill', 'circular' "
              "(or 'wrap'), and 'symmetric' (or 'symm')."
          )
  
file_path: cusignal/python/cusignal/convolution/convolution_utils.py
imports: import timeit
  import cupy
  import numpy
label_desc: Use image node_id 8 for calling a global function with example usage: _bvalfromboundary(boundary) and returns: unknown