code: def _conv(obj, dtype=None):
      """Convert an object to the preferred form for input to the odr routine."""
  
      if obj is None:
          return obj
      else:
          if dtype is None:
              obj = numpy.asarray(obj)
          else:
              obj = numpy.asarray(obj, dtype)
          if obj.shape == ():
              # Scalar.
              return obj.dtype.type(obj)
          else:
              return obj
  
imports: from __future__ import division, print_function, absolute_import
  import numpy
  from warnings import warn
  from scipy.odr import __odrpack
label_desc: Use image node_id 1 for calling a global function with example usage: _conv(obj, dtype) and returns: obj, obj, obj