code: def dot(a, b):
      if b.ndim == 1:
          return _np.dot(a, b)
  
      if a.ndim == 1:
          return _np.dot(a, b.T)
  
      return _np.einsum("...i,...i->...", a, b)
  
imports: from ._dispatch import BACKEND_NAME, _common
  from ._dispatch import numpy
label_desc: Use image node_id 27 for calling a global function with example usage: dot(a, b) and returns: _np, _np, _np