def random_string():
import os<EOL>import base64<EOL>return '<STR_LIT:.>'.join((<EOL>str(os.getpid()),<EOL>base64.urlsafe_b64encode(os.urandom(<NUM_LIT:3>)).decode('<STR_LIT>'),<EOL>))<EOL>
return a short suffix that shouldn't collide with any subsequent calls