只读事务处理（查询数据等操作）

# Construct a TPB by concatenating single-character strings (bytes)
# from the kinterbasdb.isc_tpb_* family.
customTPB = (
kinterbasdb.isc_tpb_read
+ kinterbasdb.isc_tpb_read_committed
+ kinterbasdb.isc_tpb_rec_version
)

可写事务处理（插入数据等操作）

# Construct a TPB by concatenating single-character strings (bytes)
# from the kinterbasdb.isc_tpb_* family.
customTPB = (
kinterbasdb.isc_tpb_write
+ kinterbasdb.isc_tpb_consistency
)



ZT【http://hi.baidu.com/peaksst/blog/item/809cff5056a40c668435246b.html】