[firebird-python] different encoding for varchar and blob

[Peter Irbizon]

Hello guys,

I have table with
  USER VARCHAR(100) CHARACTER SET WIN1250,
  NOTE BLOB SUB_TYPE 1 CHARACTER SET WIN1250,

But when I pick up data from this table with kinterbasdb in python 2.7 (#
-*- coding: utf-8 -*-) VARCHAR field is ok but BLOB field seems to be
"corrupted" and I must decode it with decode('cp1250'). Why this happens?
Why it is necessary to decode BLOB field only and not VARCHAR?

Thanks for help