class_docstr: This class can be used to fetch NuPic configuration settings which are
  stored in one or more XML files.
  
  If the environment variable ``NTA_CONF_PATH`` is defined, then the
  configuration files are expected to be in the ``NTA_CONF_PATH`` search path,
  which is a ':' separated list of directories (on Windows the separator is a
  ';'). If ``NTA_CONF_PATH`` is not defined, then it is loaded via
  pkg_resources.
docstr: Read in all standard configuration files
  
      
docstr_tok: ["Read","in","all","standard","configuration","files"]
code: def _readStdConfigFiles(cls):
      """Read in all standard configuration files"""
  
      # Default one first
      cls.readConfigFile(DEFAULT_CONFIG)
  
      # Site specific one can override properties defined in default
      cls.readConfigFile(USER_CONFIG)
  
imports: from __future__ import with_statement
  import os
  import logging
  from xml.etree import ElementTree
  from pkg_resources import resource_string
label_desc: Use image node_id 14 for calling the Configuration obj's underlying member method code with example usage: obj._readStdConfigFiles(cls) without return types