X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=psycopg2%2Fexamples%2Fencoding.py;fp=psycopg2%2Fexamples%2Fencoding.py;h=da57bcf196e7ba7b17ce100c64fbb59d9e941888;hb=e5bdc26e1423689c0ab3204931335787737946ea;hp=0000000000000000000000000000000000000000;hpb=f8dd312990da7cc744e1c148bfd395c18492f3f1;p=plcapi.git diff --git a/psycopg2/examples/encoding.py b/psycopg2/examples/encoding.py new file mode 100644 index 0000000..da57bcf --- /dev/null +++ b/psycopg2/examples/encoding.py @@ -0,0 +1,105 @@ +# enkoding.py - show to change client enkoding (and test it works) +# -*- encoding: utf8 -*- +# +# Copyright (C) 2004 Federico Di Gregorio +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by the +# Free Software Foundation; either version 2, or (at your option) any later +# version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY +# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +# for more details. + +## put in DSN your DSN string + +DSN = 'dbname=test' + +## don't modify anything below this line (except for experimenting) + +import sys +import psycopg2 +import psycopg2.extensions + +if len(sys.argv) > 1: + DSN = sys.argv[1] + +print "Opening connection using dns:", DSN +conn = psycopg2.connect(DSN) +print "Initial encoding for this connection is", conn.encoding + +print "\n** This example is supposed to be run in a UNICODE terminal! **\n" + +print "Available encodings:" +encs = psycopg2.extensions.encodings.items() +encs.sort() +for a, b in encs: + print " ", a, "<->", b + +print "Using STRING typecaster" +print "Setting backend encoding to LATIN1 and executing queries:" +conn.set_client_encoding('LATIN1') +curs = conn.cursor() +curs.execute("SELECT %s::TEXT AS foo", ('àèìòù',)) +x = curs.fetchone()[0] +print " ->", unicode(x, 'latin-1').encode('utf-8'), type(x) +curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù',)) +x = curs.fetchone()[0] +print " ->", unicode(x, 'latin-1').encode('utf-8'), type(x) + +print "Setting backend encoding to UTF8 and executing queries:" +conn.set_client_encoding('UNICODE') +curs = conn.cursor() +curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù'.encode('utf-8'),)) +x = curs.fetchone()[0] +print " ->", x, type(x) +curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù',)) +x = curs.fetchone()[0] +print " ->", x, type(x) + +print "Using UNICODE typecaster" +psycopg2.extensions.register_type(psycopg2.extensions.UNICODE) + +print "Setting backend encoding to LATIN1 and executing queries:" +conn.set_client_encoding('LATIN1') +curs = conn.cursor() +curs.execute("SELECT %s::TEXT AS foo", ('àèìòù',)) +x = curs.fetchone()[0] +print " ->", x.encode('utf-8'), ":", type(x) +curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù',)) +x = curs.fetchone()[0] +print " ->", x.encode('utf-8'), ":", type(x) + +print "Setting backend encoding to UTF8 and executing queries:" +conn.set_client_encoding('UNICODE') +curs = conn.cursor() +curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù'.encode('utf-8'),)) +x = curs.fetchone()[0] +print " ->", x.encode('utf-8'), ":", type(x) +curs.execute("SELECT %s::TEXT AS foo", (u'àèìòù',)) +x = curs.fetchone()[0] +print " ->", x.encode('utf-8'), ":", type(x) + +print "Executing full UNICODE queries" + +print "Setting backend encoding to LATIN1 and executing queries:" +conn.set_client_encoding('LATIN1') +curs = conn.cursor() +curs.execute(u"SELECT %s::TEXT AS foo", ('àèìòù',)) +x = curs.fetchone()[0] +print " ->", x.encode('utf-8'), ":", type(x) +curs.execute(u"SELECT %s::TEXT AS foo", (u'àèìòù',)) +x = curs.fetchone()[0] +print " ->", x.encode('utf-8'), ":", type(x) + +print "Setting backend encoding to UTF8 and executing queries:" +conn.set_client_encoding('UNICODE') +curs = conn.cursor() +curs.execute(u"SELECT %s::TEXT AS foo", (u'àèìòù'.encode('utf-8'),)) +x = curs.fetchone()[0] +print " ->", x.encode('utf-8'), ":", type(x) +curs.execute(u"SELECT %s::TEXT AS foo", (u'àèìòù',)) +x = curs.fetchone()[0] +print " ->", x.encode('utf-8'), ":", type(x)