class_docstr: based on https://github.com/cgtuebingen/learning-blind-motion-deblurring/blob/master/synthblur/src/flow.cpp#L44
code: def read(file):
      # https://stackoverflow.com/a/44906777/7443104
      with open(file, "rb") as f:
          magic = np.fromfile(f, np.float32, count=1)
          if 202021.25 != magic:
              raise Exception(
                  "Magic number incorrect. Invalid .flo file"
              )
          else:
              w = np.fromfile(f, np.int32, count=1)[0]
              h = np.fromfile(f, np.int32, count=1)[0]
              data = np.fromfile(f, np.float32, count=2 * w * h)
              return np.resize(data, (h, w, 2))
  
imports: import numpy
label_desc: Use image node_id 2 for calling the Flow obj's underlying member method code with example usage: obj.read(file) and returns: np