<s> """<STR_LIT>""" <EOL> __author__ = "<STR_LIT>" <EOL> """<STR_LIT>""" <EOL> from pylearn2 . utils . exc import EnvironmentVariableError , NoDataPathError <EOL> from pylearn2 . utils . common_strings import environment_variable_essay <EOL> class NotInstalledError ( Exception ) : <EOL> """<STR_LIT>""" </s>
