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https://github.com/psycopg/psycopg2.git
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106 lines
3.6 KiB
Python
106 lines
3.6 KiB
Python
# encoding.py - show to change client encoding (and test it works)
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# -*- encoding: utf8 -*-
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#
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# Copyright (C) 2004-2010 Federico Di Gregorio <fog@debian.org>
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#
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# psycopg2 is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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# License 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 psycopg2.extensions
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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 dsn:", DSN)
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conn = psycopg2.connect(DSN)
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print("Initial encoding for this connection is", conn.encoding)
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print("\n** This example is supposed to be run in a UNICODE terminal! **\n")
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print("Available encodings:")
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encs = psycopg2.extensions.encodings.items()
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encs.sort()
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for a, b in encs:
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print(" ", a, "<->", b)
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print("Using STRING typecaster")
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print("Setting backend encoding to LATIN1 and executing queries:")
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conn.set_client_encoding('LATIN1')
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curs = conn.cursor()
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curs.execute("SELECT %s::TEXT AS foo", ('àèìòù',))
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x = curs.fetchone()[0]
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print(" ->", unicode(x, 'latin-1').encode('utf-8'), type(x))
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curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù',))
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x = curs.fetchone()[0]
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print(" ->", unicode(x, 'latin-1').encode('utf-8'), type(x))
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print("Setting backend encoding to UTF8 and executing queries:")
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conn.set_client_encoding('UNICODE')
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curs = conn.cursor()
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curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù'.encode('utf-8'),))
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x = curs.fetchone()[0]
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print(" ->", x, type(x))
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curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù',))
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x = curs.fetchone()[0]
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print(" ->", x, type(x))
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print("Using UNICODE typecaster")
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psycopg2.extensions.register_type(psycopg2.extensions.UNICODE)
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print("Setting backend encoding to LATIN1 and executing queries:")
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conn.set_client_encoding('LATIN1')
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curs = conn.cursor()
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curs.execute("SELECT %s::TEXT AS foo", ('àèìòù',))
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x = curs.fetchone()[0]
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print(" ->", x.encode('utf-8'), ":", type(x))
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curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù',))
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x = curs.fetchone()[0]
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print(" ->", x.encode('utf-8'), ":", type(x))
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print("Setting backend encoding to UTF8 and executing queries:")
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conn.set_client_encoding('UNICODE')
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curs = conn.cursor()
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curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù'.encode('utf-8'),))
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x = curs.fetchone()[0]
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print(" ->", x.encode('utf-8'), ":", type(x))
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curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù',))
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x = curs.fetchone()[0]
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print(" ->", x.encode('utf-8'), ":", type(x))
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print("Executing full UNICODE queries")
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print("Setting backend encoding to LATIN1 and executing queries:")
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conn.set_client_encoding('LATIN1')
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curs = conn.cursor()
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curs.execute(u"SELECT %s::TEXT AS foo", ('àèìòù',))
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x = curs.fetchone()[0]
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print(" ->", x.encode('utf-8'), ":", type(x))
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curs.execute(u"SELECT %s::TEXT AS foo", (u'àèìòù',))
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x = curs.fetchone()[0]
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print(" ->", x.encode('utf-8'), ":", type(x))
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print("Setting backend encoding to UTF8 and executing queries:")
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conn.set_client_encoding('UNICODE')
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curs = conn.cursor()
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curs.execute(u"SELECT %s::TEXT AS foo", (u'àèìòù'.encode('utf-8'),))
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x = curs.fetchone()[0]
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print(" ->", x.encode('utf-8'), ":", type(x))
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curs.execute(u"SELECT %s::TEXT AS foo", (u'àèìòù',))
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x = curs.fetchone()[0]
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print(" ->", x.encode('utf-8'), ":", type(x))
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