docstr: Convert *obj* using *unit*.
  
  If *obj* is a sequence, return the converted sequence.
code: def convert(obj, unit, axis):
      """
      Convert *obj* using *unit*.
  
      If *obj* is a sequence, return the converted sequence.
      """
      if np.iterable(obj):
          return [o.value(unit) for o in obj]
      else:
          return obj.value(unit)
  
file_path: matplotlib/galleries/examples/units/evans_test.py
imports: import matplotlib.pyplot
  import numpy
  import matplotlib.ticker
  import matplotlib.units
label_desc: Use image node_id 2 for calling the FooConverter obj's underlying member method code with example usage: obj.convert(obj, unit, axis) and returns: unknown, obj