docstr: Inventory versions of pysal packages that are installed
  
  Attributes
  ----------
  installed: dict
             key is package name, value is version string
docstr_tok: ["Inventory","versions","of","pysal","packages","that","are","installed","Attributes","--","--","--","--","--","installed",":","dict","key","is","package","name",",","value","is","version","string"]
code: def installed(self):
      """
      Inventory versions of pysal packages that are installed
  
      Attributes
      ----------
      installed: dict
                 key is package name, value is version string
      """
      return _installed_versions()
  
file_path: pysal/pysal/base.py
label_desc: Use image node_id 1 for calling the Versions obj's underlying member method code with example usage: obj.installed() and returns: _installed_versions