class_docstr: Cast everything to string
class_docstr_tok: ["Cast","everything","to","string"]
code: def __call__(self, val):
      if val is None:
          return ""
      return str(val)
  
imports: from __future__ import division
  from datetime import date, datetime, time
  from math import floor, log
  from pygal.util import float_format
label_desc: Use image node_id 1 for calling the Raw obj's underlying member method code with example usage: obj.__call__(val) and returns: str, str