start_time = 1234566
 end_time = 1234578

>>> import time
>>> time.gmtime(123456)
time.struct_time(tm_year=1970, tm_mon=1, tm_mday=2, tm_hour=10, tm_min=17, tm_sec=36, tm_wday=4, tm_yday=2, tm_isdst=0)

2012-09-12 21:00:00

`TypeError: a float is required`

mend = time.gmtime(getbbb_class.end_time).tm_hour

time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1347517370))

In [1]: time.time()
Out[1]: 1347517739.44904

In [2]: time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime(time.time()))
Out[2]: '2012-09-13 06:31:43'

>>> import time
>>> time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime(1347517119))
'2012-09-12 23:18:39'

INSERT INTO tblname VALUES (FROM_UNIXTIME(1347517119))

The ctime(), gmtime() and localtime() functions all take an argument of data type time_t which represents calendar  time.   When  inter-
       preted  as  an absolute time value, it represents the number of seconds elapsed since 00:00:00 on January 1, 1970, Coordinated Universal
       Time (UTC).

>>> time.time()
1347517171.6514659
>>> time.gmtime(time.time())
(2012, 9, 13, 6, 19, 34, 3, 257, 0)