code: def __init__(self, content, parent=None):
      Length.__init__(self, content, "x", parent)
  
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 1 to create a new XLength object from inherited base classes: Length with example: obj = XLength(content, parent)