docstr: Return the standard vertical stem width as float, or *None* if
  not specified in AFM file.
docstr_tok: ["Return","the","standard","vertical","stem","width","as","float",",","or","*","None","*","if","not","specified","in","AFM","file","."]
code: def get_vertical_stem_width(self):
      """
      Return the standard vertical stem width as float, or *None* if
      not specified in AFM file.
      """
      return self._header.get("StdVW", None)
  
imports: import sys, os, re
  from _mathtext_data import uni2type1
label_desc: Use image node_id 21 for calling the AFM obj's underlying member method code with example usage: obj.get_vertical_stem_width() and returns: self