code: def fromXML(self, name, attrs, content, ttFont):
      if not hasattr(self, "values"):
          self.values = array.array("h")
      if name == "cv":
          index = safeEval(attrs["index"])
          value = safeEval(attrs["value"])
          for i in range(1 + index - len(self.values)):
              self.values.append(0)
          self.values[index] = value
  
file_path: catboost/contrib/python/fonttools/fontTools/ttLib/tables/_c_v_t.py
imports: from fontTools.misc.textTools import safeEval
  from .None import DefaultTable
  import sys
  import array
label_desc: Use image node_id 4 for calling the table__c_v_t obj's underlying member method code with example usage: obj.fromXML(name, attrs, content, ttFont) without return types