cpython/Doc/includes/sqlite3/text_factory.py

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import sqlite3
con = sqlite3.connect(":memory:")
cur = con.cursor()
# Create the table
con.execute("create table person(lastname, firstname)")
AUSTRIA = u"\xd6sterreich"
# by default, rows are returned as Unicode
cur.execute("select ?", (AUSTRIA,))
row = cur.fetchone()
assert row[0] == AUSTRIA
Merged revisions 72319-72320,72467,72661,72675-72679,72703,72708,72710,72712,72801-72802,72820,72822,72824,72826-72828,72830 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r72319 | georg.brandl | 2009-05-05 10:28:49 +0200 (Di, 05 Mai 2009) | 1 line #1309567: fix linecache behavior of stripping subdirectories from paths when looking for relative filename matches. Also add a linecache test suite. ........ r72320 | georg.brandl | 2009-05-05 10:30:28 +0200 (Di, 05 Mai 2009) | 1 line Add a news entry for r72319. ........ r72467 | georg.brandl | 2009-05-08 14:17:34 +0200 (Fr, 08 Mai 2009) | 1 line Fix name. ........ r72661 | georg.brandl | 2009-05-15 10:03:03 +0200 (Fr, 15 Mai 2009) | 1 line Fix example output for doctest-like demos. ........ r72675 | georg.brandl | 2009-05-16 13:13:21 +0200 (Sa, 16 Mai 2009) | 1 line #6034: clarify __reversed__ doc. ........ r72676 | georg.brandl | 2009-05-16 13:14:46 +0200 (Sa, 16 Mai 2009) | 1 line #6025: fix signature of parse(). ........ r72677 | georg.brandl | 2009-05-16 13:18:55 +0200 (Sa, 16 Mai 2009) | 1 line #6009: undocument default argument of Option as deprecated. ........ r72678 | georg.brandl | 2009-05-16 13:21:29 +0200 (Sa, 16 Mai 2009) | 1 line #2856: document 2.x os.listdir() behavior for undecodable filenames. ........ r72679 | georg.brandl | 2009-05-16 13:24:41 +0200 (Sa, 16 Mai 2009) | 1 line Fix about and bugs pages to match real workflow. ........ r72703 | georg.brandl | 2009-05-17 10:10:27 +0200 (So, 17 Mai 2009) | 1 line part of #4144: fix exception message in console session. ........ r72708 | georg.brandl | 2009-05-17 10:24:29 +0200 (So, 17 Mai 2009) | 1 line #6017: better document behavior of dictiterators when the dict is changed. ........ r72710 | georg.brandl | 2009-05-17 10:36:04 +0200 (So, 17 Mai 2009) | 1 line #5942: Copy over flag table from dbm.rst which is clearer. ........ r72712 | georg.brandl | 2009-05-17 10:55:00 +0200 (So, 17 Mai 2009) | 1 line #5935: mention that BROWSER is looked for in PATH. ........ r72801 | georg.brandl | 2009-05-20 20:31:14 +0200 (Mi, 20 Mai 2009) | 1 line #6055: refer to "sqlite3" consistently. ........ r72802 | georg.brandl | 2009-05-20 20:35:27 +0200 (Mi, 20 Mai 2009) | 1 line #6051: refer to email examples for better way to construct email messages. ........ r72820 | georg.brandl | 2009-05-22 09:23:32 +0200 (Fr, 22 Mai 2009) | 1 line Use raise X(y). ........ r72822 | georg.brandl | 2009-05-22 11:33:25 +0200 (Fr, 22 Mai 2009) | 1 line #6084: fix example. ........ r72824 | georg.brandl | 2009-05-22 11:43:17 +0200 (Fr, 22 Mai 2009) | 1 line Fix references to file-related functions and methods (os.* vs file.*). ........ r72826 | georg.brandl | 2009-05-22 11:49:42 +0200 (Fr, 22 Mai 2009) | 1 line Fix confusing wording. ........ r72827 | georg.brandl | 2009-05-22 11:50:30 +0200 (Fr, 22 Mai 2009) | 1 line s/use/call/ ........ r72828 | georg.brandl | 2009-05-22 11:58:48 +0200 (Fr, 22 Mai 2009) | 1 line Correction in softspace behavior description. ........ r72830 | georg.brandl | 2009-05-22 12:40:00 +0200 (Fr, 22 Mai 2009) | 1 line #6086: fix spelling and use a better exception to catch. ........
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# but we can make sqlite3 always return bytestrings ...
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con.text_factory = str
cur.execute("select ?", (AUSTRIA,))
row = cur.fetchone()
assert type(row[0]) == str
# the bytestrings will be encoded in UTF-8, unless you stored garbage in the
# database ...
assert row[0] == AUSTRIA.encode("utf-8")
# we can also implement a custom text_factory ...
# here we implement one that will ignore Unicode characters that cannot be
# decoded from UTF-8
con.text_factory = lambda x: unicode(x, "utf-8", "ignore")
Merged revisions 72319-72320,72467,72661,72675-72679,72703,72708,72710,72712,72801-72802,72820,72822,72824,72826-72828,72830 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r72319 | georg.brandl | 2009-05-05 10:28:49 +0200 (Di, 05 Mai 2009) | 1 line #1309567: fix linecache behavior of stripping subdirectories from paths when looking for relative filename matches. Also add a linecache test suite. ........ r72320 | georg.brandl | 2009-05-05 10:30:28 +0200 (Di, 05 Mai 2009) | 1 line Add a news entry for r72319. ........ r72467 | georg.brandl | 2009-05-08 14:17:34 +0200 (Fr, 08 Mai 2009) | 1 line Fix name. ........ r72661 | georg.brandl | 2009-05-15 10:03:03 +0200 (Fr, 15 Mai 2009) | 1 line Fix example output for doctest-like demos. ........ r72675 | georg.brandl | 2009-05-16 13:13:21 +0200 (Sa, 16 Mai 2009) | 1 line #6034: clarify __reversed__ doc. ........ r72676 | georg.brandl | 2009-05-16 13:14:46 +0200 (Sa, 16 Mai 2009) | 1 line #6025: fix signature of parse(). ........ r72677 | georg.brandl | 2009-05-16 13:18:55 +0200 (Sa, 16 Mai 2009) | 1 line #6009: undocument default argument of Option as deprecated. ........ r72678 | georg.brandl | 2009-05-16 13:21:29 +0200 (Sa, 16 Mai 2009) | 1 line #2856: document 2.x os.listdir() behavior for undecodable filenames. ........ r72679 | georg.brandl | 2009-05-16 13:24:41 +0200 (Sa, 16 Mai 2009) | 1 line Fix about and bugs pages to match real workflow. ........ r72703 | georg.brandl | 2009-05-17 10:10:27 +0200 (So, 17 Mai 2009) | 1 line part of #4144: fix exception message in console session. ........ r72708 | georg.brandl | 2009-05-17 10:24:29 +0200 (So, 17 Mai 2009) | 1 line #6017: better document behavior of dictiterators when the dict is changed. ........ r72710 | georg.brandl | 2009-05-17 10:36:04 +0200 (So, 17 Mai 2009) | 1 line #5942: Copy over flag table from dbm.rst which is clearer. ........ r72712 | georg.brandl | 2009-05-17 10:55:00 +0200 (So, 17 Mai 2009) | 1 line #5935: mention that BROWSER is looked for in PATH. ........ r72801 | georg.brandl | 2009-05-20 20:31:14 +0200 (Mi, 20 Mai 2009) | 1 line #6055: refer to "sqlite3" consistently. ........ r72802 | georg.brandl | 2009-05-20 20:35:27 +0200 (Mi, 20 Mai 2009) | 1 line #6051: refer to email examples for better way to construct email messages. ........ r72820 | georg.brandl | 2009-05-22 09:23:32 +0200 (Fr, 22 Mai 2009) | 1 line Use raise X(y). ........ r72822 | georg.brandl | 2009-05-22 11:33:25 +0200 (Fr, 22 Mai 2009) | 1 line #6084: fix example. ........ r72824 | georg.brandl | 2009-05-22 11:43:17 +0200 (Fr, 22 Mai 2009) | 1 line Fix references to file-related functions and methods (os.* vs file.*). ........ r72826 | georg.brandl | 2009-05-22 11:49:42 +0200 (Fr, 22 Mai 2009) | 1 line Fix confusing wording. ........ r72827 | georg.brandl | 2009-05-22 11:50:30 +0200 (Fr, 22 Mai 2009) | 1 line s/use/call/ ........ r72828 | georg.brandl | 2009-05-22 11:58:48 +0200 (Fr, 22 Mai 2009) | 1 line Correction in softspace behavior description. ........ r72830 | georg.brandl | 2009-05-22 12:40:00 +0200 (Fr, 22 Mai 2009) | 1 line #6086: fix spelling and use a better exception to catch. ........
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cur.execute("select ?", ("this is latin1 and would normally create errors" +
u"\xe4\xf6\xfc".encode("latin1"),))
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row = cur.fetchone()
assert type(row[0]) == unicode
Merged revisions 72319-72320,72467,72661,72675-72679,72703,72708,72710,72712,72801-72802,72820,72822,72824,72826-72828,72830 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r72319 | georg.brandl | 2009-05-05 10:28:49 +0200 (Di, 05 Mai 2009) | 1 line #1309567: fix linecache behavior of stripping subdirectories from paths when looking for relative filename matches. Also add a linecache test suite. ........ r72320 | georg.brandl | 2009-05-05 10:30:28 +0200 (Di, 05 Mai 2009) | 1 line Add a news entry for r72319. ........ r72467 | georg.brandl | 2009-05-08 14:17:34 +0200 (Fr, 08 Mai 2009) | 1 line Fix name. ........ r72661 | georg.brandl | 2009-05-15 10:03:03 +0200 (Fr, 15 Mai 2009) | 1 line Fix example output for doctest-like demos. ........ r72675 | georg.brandl | 2009-05-16 13:13:21 +0200 (Sa, 16 Mai 2009) | 1 line #6034: clarify __reversed__ doc. ........ r72676 | georg.brandl | 2009-05-16 13:14:46 +0200 (Sa, 16 Mai 2009) | 1 line #6025: fix signature of parse(). ........ r72677 | georg.brandl | 2009-05-16 13:18:55 +0200 (Sa, 16 Mai 2009) | 1 line #6009: undocument default argument of Option as deprecated. ........ r72678 | georg.brandl | 2009-05-16 13:21:29 +0200 (Sa, 16 Mai 2009) | 1 line #2856: document 2.x os.listdir() behavior for undecodable filenames. ........ r72679 | georg.brandl | 2009-05-16 13:24:41 +0200 (Sa, 16 Mai 2009) | 1 line Fix about and bugs pages to match real workflow. ........ r72703 | georg.brandl | 2009-05-17 10:10:27 +0200 (So, 17 Mai 2009) | 1 line part of #4144: fix exception message in console session. ........ r72708 | georg.brandl | 2009-05-17 10:24:29 +0200 (So, 17 Mai 2009) | 1 line #6017: better document behavior of dictiterators when the dict is changed. ........ r72710 | georg.brandl | 2009-05-17 10:36:04 +0200 (So, 17 Mai 2009) | 1 line #5942: Copy over flag table from dbm.rst which is clearer. ........ r72712 | georg.brandl | 2009-05-17 10:55:00 +0200 (So, 17 Mai 2009) | 1 line #5935: mention that BROWSER is looked for in PATH. ........ r72801 | georg.brandl | 2009-05-20 20:31:14 +0200 (Mi, 20 Mai 2009) | 1 line #6055: refer to "sqlite3" consistently. ........ r72802 | georg.brandl | 2009-05-20 20:35:27 +0200 (Mi, 20 Mai 2009) | 1 line #6051: refer to email examples for better way to construct email messages. ........ r72820 | georg.brandl | 2009-05-22 09:23:32 +0200 (Fr, 22 Mai 2009) | 1 line Use raise X(y). ........ r72822 | georg.brandl | 2009-05-22 11:33:25 +0200 (Fr, 22 Mai 2009) | 1 line #6084: fix example. ........ r72824 | georg.brandl | 2009-05-22 11:43:17 +0200 (Fr, 22 Mai 2009) | 1 line Fix references to file-related functions and methods (os.* vs file.*). ........ r72826 | georg.brandl | 2009-05-22 11:49:42 +0200 (Fr, 22 Mai 2009) | 1 line Fix confusing wording. ........ r72827 | georg.brandl | 2009-05-22 11:50:30 +0200 (Fr, 22 Mai 2009) | 1 line s/use/call/ ........ r72828 | georg.brandl | 2009-05-22 11:58:48 +0200 (Fr, 22 Mai 2009) | 1 line Correction in softspace behavior description. ........ r72830 | georg.brandl | 2009-05-22 12:40:00 +0200 (Fr, 22 Mai 2009) | 1 line #6086: fix spelling and use a better exception to catch. ........
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# sqlite3 offers a builtin optimized text_factory that will return bytestring
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# objects, if the data is in ASCII only, and otherwise return unicode objects
con.text_factory = sqlite3.OptimizedUnicode
cur.execute("select ?", (AUSTRIA,))
row = cur.fetchone()
assert type(row[0]) == unicode
cur.execute("select ?", ("Germany",))
row = cur.fetchone()
assert type(row[0]) == str