def load_environment_vars(self):
for k, v in os.environ.items():<EOL><INDENT>if k.startswith(MACH9_PREFIX):<EOL><INDENT>_, config_key = k.split(MACH9_PREFIX, <NUM_LIT:1>)<EOL>self[config_key] = v<EOL><DEDENT><DEDENT>
Looks for any MACH9_ prefixed environment variables and applies
them to the configuration if present.