def getdebug(environ=os.environ, true_values=TRUE_VALUES):
return environ.get('<STR_LIT>', '<STR_LIT>').lower() in true_values<EOL>
Get if app is expected to be ran in debug mode looking at environment
variables.

:param environ: environment dict-like object
:type environ: collections.abc.Mapping
:returns: True if debug contains a true-like string, False otherwise
:rtype: bool