def to_bin(n):
    bStr = ''
    if n == 0: 
        return '0'
    while n > 0:
        bStr = str(n % 2) + bStr
        n = n >> 1
    return bStr

def mtime_to_unix(mtime):
    bits = to_bin(mtime)
    print bits
    year = int(bits[:5], 2) + 1980
    month = int(bits[5:9], 2)
    day = int(bits[9:14], 2)
    hour = int(bits[16:20], 2)
    minute = int(bits[20:25], 2)
    second = int(bits[25:30], 2)
    print (year, month, day, hour, minute, second)
    t = time.mktime((year, month, day, hour, minute, second, -1, -1, -1))
    return t

def unix_to_mtime(unix):
    year, month, day, hour, minute, second = [ to_bin(x) for x in time.localtime(unix)[:-3] ]
    print time.localtime(unix)[:-3]
    year = to_bin(int(year,2)-1980)
    def pad(value, num):
        return ("0"*num)[len(value):]+value
    bits = ""
    bits += pad(year, 5)
    bits += pad(month, 4)
    bits += pad(day, 5) 
    bits += "01" # BAD BAD BAD BAD, also, doesn't work
    bits += pad(hour, 4)
    bits += pad(minute, 5)
    bits += pad(second, 5)
    print bits
    mt = int(bits, 2)
    return mt

### END CODE ###
Example output:

>>> rbdb.unix_to_mtime(rbdb.mtime_to_unix(957849363))
111001000101111001111100010011
(2008, 8, 23, 7, 24, 19)
(2008, 8, 23, 7, 24, 19, 5, 236, 1)
111001000101110101111100010011
957832979
>>> rbdb.unix_to_mtime(rbdb.mtime_to_unix(957240124))
111001000011100101001100111100
(2008, 8, 14, 4, 25, 28)
(2008, 8, 14, 4, 25, 28, 3, 227, 1)
111001000011100101001100111100
957240124
>>> rbdb.unix_to_mtime(rbdb.mtime_to_unix(953842093))
111000110110100111100110101101
(2008, 6, 26, 14, 13, 13)
(2008, 6, 26, 14, 13, 13, 3, 178, 1)
111000110110100111100110101101
953842093
>>> rbdb.unix_to_mtime(rbdb.mtime_to_unix(953842177))
111000110110100111101000000001
(2008, 6, 26, 14, 16, 1)
(2008, 6, 26, 14, 16, 1, 3, 178, 1)
111000110110100111101000000001
953842177