Fixed bug in detecting the current time zone (#257).

Author: anthony-tuininga

doc/src/release_notes.rst

@@ -13,6 +13,8 @@ oracledb 2.0.0 (TBD)
 Thin Mode Changes
 +++++++++++++++++
 
+#)  Fixed bug in detecting the current time zone
+    (`issue 257 <https://github.com/oracle/python-oracledb/issues/257>`__).
 #)  Fixed bug in handling database response in certain unusual circumstances.
 #)  Fixed bug in handling exceptions raised during connection establishment.
 #)  Fixed bug in identifying bind variables in SQL statements containing

src/oracledb/impl/thin/messages.pyx

@@ -1457,7 +1457,7 @@ cdef class AuthMessage(Message):
             str sign, tz_repr
         tz_repr = os.environ.get("ORA_SDTZ")
         if tz_repr is None:
-            timezone = -time.altzone if time.daylight else -time.timezone
+            timezone = time.localtime().tm_gmtoff
             tz_hour = timezone // 3600
             tz_minute = (timezone - (tz_hour * 3600)) // 60
             if tz_hour < 0: