Re: jython 'utf8 encoding not found error

Jeff,

Thx for the reply. Indeed, this was a configuration error. It works now, after changing the code to:

Properties properties = new Properties();
properties.setProperty("python.path", pythonPath);
PythonInterpreter.initialize(System.getProperties(), properties, new String[] { "" });
PythonInterpreter pythonInterpreter = new PythonInterpreter();
pythonInterpreter.exec("import codecs");
pythonInterpreter.exec("codecs.getreader('utf8')");

where pythonPath is the painfully obtained path to somewhere in my deployed .war, where the "Lib" directory with python modules resides. Now I can also explicitly do:

pythonInterpreter.exec("import encodings");

I guess I can wrap it all up in some postConstruct Spring method, which will be invoked when starting Spring context. Am I right that python.path is set once per a ClassLoader? Also, are there any other recommended options to set this property, or the spring initialization seems like an elegant enough solution?

Br.
Radek Madej

From: Jeff Emanuel [mailto:[email protected]]
Sent: Wednesday, February 04, 2015 19:13
To: [email protected]
Subject: Re: [Jython-users] jython 'utf8 encoding not found error

WFM in 2.5.3 in the jython console and in the interpreter embedded in my app.
It's likely a configuration error.

It looks like the encodings are loaded via

                imp.load("encodings");

Can you explicitly import encodings?  If not that might give a clue.  Try turning python.verbose
up to debug for detailed import messages.

pythonInterpreter.exec("import encodings");

On 2/4/2015 2:09 AM, Radosław Madej wrote:
Hi,

I have a problem with jython 'utf8' encoding.

The Jython version I am using is 2.5.3, embedded in my web application. After doing this in my Java code:

PythonInterpreter pythonInterpreter = new PythonInterpreter();

pythonInterpreter.exec("import codecs");

pythonInterpreter.exec("codecs.getreader('utf8')");

Such an error occurs:

File "<string>", line 1, in <module>

File "__pyclasspath__/codecs$py.class", line 920, in getreader

LookupError: no codec search functions registered: can't find encoding 'utf8'

How can the reader with 'utf8' encoding be obtained properly?

According to the python documentation, there should be 'utf8' encoding available in codecs module: https://docs.python.org/2/library/codecs.html#standard-encodings (lower / upper case and hyphen / underscore are all allowed).

I use Windows 7, java 1.7.0_71. OS should not matter I guess - this is the web application run on jboss (version 7.2).

I've also posted the question to the stackoverflow, but no answers yet...:

http://stackoverflow.com/questions/28303395/how-to-obtain-utf-8-reader-in-pythoninterpreter-jython

Br,

Radek





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leadership blogs to news, videos, case studies, tutorials and more. Take a
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