code: def pre_call(self, stream):
      if stream is not None:
          memcpy_htod(self.get_device_alloc(), self.array)
      else:
          memcpy_htod(self.get_device_alloc(), self.array)
  
imports: import os
  import numpy
label_desc: Use image node_id 1 for calling the In obj's underlying member method code with example usage: obj.pre_call(stream) without return types