helper.py

import re

def oimaptransfolder_qmx(foldername):
    if(foldername == "INBOX"):
        retval = "qmx"
    else:
        retval = "qmx." + re.sub('^INBOX\.', '', foldername)
    retval = re.sub("/", ".", retval)
    return retval

def localtransfolder_qmx(foldername):
    if(foldername == "qmx"):
        retval = "INBOX"
    else:
        # remove leading '.qmx'
        retval = 'INBOX.' + re.sub("qmx\.", "", foldername)
    retval = re.sub("\.", "/", retval)
    return retval