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70 lines
2.2 KiB
Python
70 lines
2.2 KiB
Python
# tz.py - example of datetime objects with time zones
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# -*- encoding: latin1 -*-
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#
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# Copyright (C) 2004 Federico Di Gregorio <fog@debian.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# for more details.
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## put in DSN your DSN string
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DSN = 'dbname=test'
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## don't modify anything below this line (except for experimenting)
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import sys
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import psycopg2
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import datetime
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from psycopg2.tz import ZERO, LOCAL, FixedOffsetTimezone
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if len(sys.argv) > 1:
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DSN = sys.argv[1]
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print "Opening connection using dns:", DSN
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conn = psycopg2.connect(DSN)
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curs = conn.cursor()
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try:
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curs.execute("CREATE TABLE test_tz (t timestamp with time zone)")
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except:
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conn.rollback()
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curs.execute("DROP TABLE test_tz")
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curs.execute("CREATE TABLE test_tz (t timestamp with time zone)")
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conn.commit()
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d = datetime.datetime(1971, 10, 19, 22, 30, 0, tzinfo=LOCAL)
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curs.execute("INSERT INTO test_tz VALUES (%s)", (d,))
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print "Inserted timestamp with timezone:", d
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print "Time zone:", d.tzinfo.tzname(d), "offset:", d.tzinfo.utcoffset(d)
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tz = FixedOffsetTimezone(-5*60, "EST")
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d = datetime.datetime(1971, 10, 19, 22, 30, 0, tzinfo=tz)
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curs.execute("INSERT INTO test_tz VALUES (%s)", (d,))
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print "Inserted timestamp with timezone:", d
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print "Time zone:", d.tzinfo.tzname(d), "offset:", d.tzinfo.utcoffset(d)
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curs.execute("SELECT * FROM test_tz")
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d = curs.fetchone()[0]
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curs.execute("INSERT INTO test_tz VALUES (%s)", (d,))
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print "Inserted SELECTed timestamp:", d
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print "Time zone:", d.tzinfo.tzname(d), "offset:", d.tzinfo.utcoffset(d)
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curs.execute("SELECT * FROM test_tz")
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for d in curs:
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u = d[0].utcoffset() or ZERO
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print "UTC time: ", d[0] - u
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print "Local time:", d[0]
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print "Time zone:", d[0].tzinfo.tzname(d[0]), d[0].tzinfo.utcoffset(d[0])
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curs.execute("DROP TABLE test_tz")
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conn.commit()
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