code: def __repr__(self):
      if self._unit:
          return "%g%s" % (self._value, self._unit)
      else:
          return "%g" % (self._value)
  
file_path: vispy/vispy/util/svg/length.py
imports: import re
  import math
  from .base import units
  from ..None import logger
label_desc: Use image node_id 4 for calling the Length obj's underlying member method code with example usage: obj.__repr__() and returns: unknown, unknown