class_docstr: Exception raised when a package can not be located.
class_docstr_tok: ["Exception","raised","when","a","package","can","not","be","located","."]
code: def __str__(self):
      return self.msg
  
imports: import sys
  import re
  import os
  from configparser import RawConfigParser
label_desc: Use image node_id 2 for calling the PkgNotFound obj's underlying member method code with example usage: obj.__str__() and returns: self