def _WriteErrorToOutput(status, message, outfile):
  logging.error(message)
  outfile.write('Status: %s\r\n\r\n%s' % (status, message))
Return comma-separated list of key column names
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/dev_appserver.py/_WriteErrorToOutput--crossover with--dataset/ETHPy150Open perseas/Pyrseas/pyrseas/dbobject/constraint.py/Constraint.key_columns