Jython

blows up in Jython and Python for me. :)

leouser


--- Neil Benn <neil.benn@...> wrote:

> Hello,
>  
>             I am trying to evaluate a script which
> runs as follows
> (using both BSF and JYthonInterp does the same
> thing):
>  
> ---
>  
> String strScript = "def test():\n";
> strScript += "\treturn 1\n";
> strScript += "test()";
>  
> Object objResult = objInterp.eval(strScript);
>  
> ---
>  
> However I get the following traceback (this is when
> run from
> JythonInterp), I've snipped the bottom bit off
> because it is in the unit
> test code
>  
>             Traceback (innermost last):
>   (no code object) at line 0
> SyntaxError: ('invalid syntax', ('<string>', 1, 1,
> 'def test():'))
>  
>             at
> org.python.core.parser.fixParseError(parser.java)
>             at
> org.python.core.parser.parse(parser.java)
>             at
> org.python.core.Py.compile_flags(Py.java)
>             at
> org.python.core.Py.compile_flags(Py.java)
>             at
> org.python.core.__builtin__.eval(__builtin__.java)
>             at
> org.python.core.__builtin__.eval(__builtin__.java)
> 
>             at
>
org.python.util.PythonInterpreter.eval(PythonInterpreter.java)
>             at
>
uk.co.ziath.datapaq.server.scripting.JythonScriptProcessor.evaluateScrip
> t(JythonScriptProcessor.java:76)
>             at
>
uk.co.ziath.datapaq.server.scripting.test.JythonScriptProcessorTest.test
>
MethodJythonScript(JythonScriptProcessorTest.java:75)
> <snip>
>  
> ---
>  
>             When I attempt to run a simple script
> such as 3* 4 and
> evaluate it, I get back 12 as I would expect. 
> However it seems that any
> multi-line script fails on me.  Is it true that I
> cannot use a
> multi-line script in an evaluate statement (I know I
> can do it in an
> execute statement)?
>  
>             Thanks for your help.
>  
> Cheers,
>  
> Neil
>  
>  
> ---
> Neil Benn
> CEO Ziath Ltd
> http://www.ziath.com
>  
> >
-------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
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_______________________________________________
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>
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> 



 
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Neil,

use Object objResult = objInterp.exec(strScript);

Please read about exec() here:
  http://www.python.org/doc/2.3.5/ref/exec.html

And eval(), from the CPython documentation
(http://www.python.org/doc/2.3/lib/built-in-funcs.html):

eval(  	expression[, globals[, locals]])
    The arguments are a string and two optional dictionaries. The
expression argument is parsed and evaluated as a Python expression
(technically speaking, a condition list) using the globals and locals
dictionaries as global and local name space. If the globals dictionary
is present and lacks '__builtins__', the current globals are copied
into globals before expression is parsed. This means that expression
normally has full access to the standard __builtin__ module and
restricted environments are propagated. If the locals dictionary is
omitted it defaults to the globals dictionary. If both dictionaries
are omitted, the expression is executed in the environment where eval
is called. The return value is the result of the evaluated expression.
Syntax errors are reported as exceptions. Example:

    >>> x = 1
    >>> print eval('x+1')
    2

    This function can also be used to execute arbitrary code objects
(such as those created by compile()). In this case pass a code object
instead of a string. The code object must have been compiled passing
'eval' as the kind argument.

    Hints: dynamic execution of statements is supported by the exec
statement. Execution of statements from a file is supported by the
execfile() function. The globals() and locals() functions returns the
current global and local dictionary, respectively, which may be useful
to pass around for use by eval() or execfile().


best wishes,
Oti.

On 12/4/06, Neil Benn <neil.benn@...> wrote:
>
>
>
>
> Hello,
>
>
>
>             I am trying to evaluate a script which runs as follows (using
> both BSF and JYthonInterp does the same thing):
>
>
>
> ---
>
>
>
> String strScript = "def test():\n";
>
> strScript += "\treturn 1\n";
>
> strScript += "test()";
>
>
>
> Object objResult = objInterp.eval(strScript);
>
>
>
> ---
>
>
>
> However I get the following traceback (this is when run from JythonInterp),
> I've snipped the bottom bit off because it is in the unit test code
>
>
>
>             Traceback (innermost last):
>
>   (no code object) at line 0
>
> SyntaxError: ('invalid syntax', ('<string>', 1, 1, 'def test():'))
>
>
>
>             at
> org.python.core.parser.fixParseError(parser.java)
>
>             at org.python.core.parser.parse(parser.java)
>
>             at org.python.core.Py.compile_flags(Py.java)
>
>             at org.python.core.Py.compile_flags(Py.java)
>
>             at
> org.python.core.__builtin__.eval(__builtin__.java)
>
>             at
> org.python.core.__builtin__.eval(__builtin__.java)
>
>
>             at
> org.python.util.PythonInterpreter.eval(PythonInterpreter.java)
>
>             at
> uk.co.ziath.datapaq.server.scripting.JythonScriptProcessor.evaluateScript(JythonScriptProcessor.java:76)
>
>             at
> uk.co.ziath.datapaq.server.scripting.test.JythonScriptProcessorTest.testMethodJythonScript(JythonScriptProcessorTest.java:75)
>
> <snip>
>
>
>
> ---
>
>
>
>             When I attempt to run a simple script such as 3* 4 and evaluate
> it, I get back 12 as I would expect.  However it seems that any multi-line
> script fails on me.  Is it true that I cannot use a multi-line script in an
> evaluate statement (I know I can do it in an execute statement)?
>
>
>
>             Thanks for your help.
>
>
>
> Cheers,
>
>
>
> Neil
>
>
>
>
>
> ---
>
> Neil Benn
>
> CEO Ziath Ltd
>
> http://www.ziath.com
>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share your
> opinions on IT & business topics through brief surveys - and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
>
> _______________________________________________
> Jython-users mailing list
> Jython-users@...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>
>
>

Hi Ben,

eval is meant for expressions. What you want to use is exec

Object objResult =3D objInterp.exec(strScript);


On 05-Dec-06, at 2:48 AM, Neil Benn wrote:

> Hello,
>
>
>
>             I am trying to evaluate a script which runs as follows =20
> (using both BSF and JYthonInterp does the same thing):
>
>
>
> ---
>
>
>
> String strScript =3D "def test():\n";
>
> strScript +=3D "\treturn 1\n";
>
> strScript +=3D "test()";
>
>
>
> Object objResult =3D objInterp.eval(strScript);
>
>
>
> ---
>
>
>
> However I get the following traceback (this is when run from =20
> JythonInterp), I=92ve snipped the bottom bit off because it is in the =20=

> unit test code
>
>
>
>             Traceback (innermost last):
>
>   (no code object) at line 0
>
> SyntaxError: ('invalid syntax', ('<string>', 1, 1, 'def test():'))
>
>
>
>             at org.python.core.parser.fixParseError(parser.java)
>
>             at org.python.core.parser.parse(parser.java)
>
>             at org.python.core.Py.compile_flags(Py.java)
>
>             at org.python.core.Py.compile_flags(Py.java)
>
>             at org.python.core.__builtin__.eval(__builtin__.java)
>
>             at org.python.core.__builtin__.eval(__builtin__.java)
>
>             at org.python.util.PythonInterpreter.eval=20
> (PythonInterpreter.java)
>
>             at =20
> uk.co.ziath.datapaq.server.scripting.JythonScriptProcessor.evaluateScr=20=

> ipt(JythonScriptProcessor.java:76)
>
>             at =20
> uk.co.ziath.datapaq.server.scripting.test.JythonScriptProcessorTest.te=20=

> stMethodJythonScript(JythonScriptProcessorTest.java:75)
>
> <snip>
>
>
>
> ---
>
>
>
>             When I attempt to run a simple script such as 3* 4 and =20
> evaluate it, I get back 12 as I would expect.  However it seems =20
> that any multi-line script fails on me.  Is it true that I cannot =20
> use a multi-line script in an evaluate statement (I know I can do =20
> it in an execute statement)?
>
>
>
>             Thanks for your help.
>
>
>
> Cheers,
>
>
>
> Neil
>
>
>
>
>
> ---
>
> Neil Benn
>
> CEO Ziath Ltd
>
> http://www.ziath.com
>
>
>
> ----------------------------------------------------------------------=20=

> ---
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to =20
> share your
> opinions on IT & business topics through brief surveys - and earn cash
> http://www.techsay.com/default.php?=20
> page=3Djoin.php&p=3Dsourceforge&CID=3DDEVDEV____________________________=
____=20
> _______________
> Jython-users mailing list
> Jython-users@...
> https://lists.sourceforge.net/lists/listinfo/jython-users

Hello,

	Thanks for that - I see that it follows CPython, I have that
working now although I do have the problem that BSF works differently
and you can't get a return from the exec call and I can't execute an
eval from Jython.  I can wrap the Jython instance so that it uses
JythonInterp rather than BSF and give them the same functionality (which
is what I'll do).

	Thanks for your help.

Cheers,

Neil

---
Neil Benn
CEO Ziath Ltd
http://www.ziath.com


-----Original Message-----
From: Oti [mailto:ohumbel@...] 
Sent: 04 December 2006 22:48
To: neil.benn@...
Cc: jython-users@...
Subject: Re: [Jython-users] Use of eval

Neil,

use Object objResult = objInterp.exec(strScript);

Please read about exec() here:
  http://www.python.org/doc/2.3.5/ref/exec.html

And eval(), from the CPython documentation
(http://www.python.org/doc/2.3/lib/built-in-funcs.html):

eval(  	expression[, globals[, locals]])
    The arguments are a string and two optional dictionaries. The
expression argument is parsed and evaluated as a Python expression
(technically speaking, a condition list) using the globals and locals
dictionaries as global and local name space. If the globals dictionary
is present and lacks '__builtins__', the current globals are copied
into globals before expression is parsed. This means that expression
normally has full access to the standard __builtin__ module and
restricted environments are propagated. If the locals dictionary is
omitted it defaults to the globals dictionary. If both dictionaries
are omitted, the expression is executed in the environment where eval
is called. The return value is the result of the evaluated expression.
Syntax errors are reported as exceptions. Example:

    >>> x = 1
    >>> print eval('x+1')
    2

    This function can also be used to execute arbitrary code objects
(such as those created by compile()). In this case pass a code object
instead of a string. The code object must have been compiled passing
'eval' as the kind argument.

    Hints: dynamic execution of statements is supported by the exec
statement. Execution of statements from a file is supported by the
execfile() function. The globals() and locals() functions returns the
current global and local dictionary, respectively, which may be useful
to pass around for use by eval() or execfile().


best wishes,
Oti.

On 12/4/06, Neil Benn <neil.benn@...> wrote:
>
>
>
>
> Hello,
>
>
>
>             I am trying to evaluate a script which runs as follows
(using
> both BSF and JYthonInterp does the same thing):
>
>
>
> ---
>
>
>
> String strScript = "def test():\n";
>
> strScript += "\treturn 1\n";
>
> strScript += "test()";
>
>
>
> Object objResult = objInterp.eval(strScript);
>
>
>
> ---
>
>
>
> However I get the following traceback (this is when run from
JythonInterp),
> I've snipped the bottom bit off because it is in the unit test code
>
>
>
>             Traceback (innermost last):
>
>   (no code object) at line 0
>
> SyntaxError: ('invalid syntax', ('<string>', 1, 1, 'def test():'))
>
>
>
>             at
> org.python.core.parser.fixParseError(parser.java)
>
>             at org.python.core.parser.parse(parser.java)
>
>             at org.python.core.Py.compile_flags(Py.java)
>
>             at org.python.core.Py.compile_flags(Py.java)
>
>             at
> org.python.core.__builtin__.eval(__builtin__.java)
>
>             at
> org.python.core.__builtin__.eval(__builtin__.java)
>
>
>             at
> org.python.util.PythonInterpreter.eval(PythonInterpreter.java)
>
>             at
>
uk.co.ziath.datapaq.server.scripting.JythonScriptProcessor.evaluateScrip
t(JythonScriptProcessor.java:76)
>
>             at
>
uk.co.ziath.datapaq.server.scripting.test.JythonScriptProcessorTest.test
MethodJythonScript(JythonScriptProcessorTest.java:75)
>
> <snip>
>
>
>
> ---
>
>
>
>             When I attempt to run a simple script such as 3* 4 and
evaluate
> it, I get back 12 as I would expect.  However it seems that any
multi-line
> script fails on me.  Is it true that I cannot use a multi-line script
in an
> evaluate statement (I know I can do it in an execute statement)?
>
>
>
>             Thanks for your help.
>
>
>
> Cheers,
>
>
>
> Neil
>
>
>
>
>
> ---
>
> Neil Benn
>
> CEO Ziath Ltd
>
> http://www.ziath.com
>
>
>
------------------------------------------------------------------------
-
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to
share your
> opinions on IT & business topics through brief surveys - and earn cash
>
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDE
V
>
> _______________________________________________
> Jython-users mailing list
> Jython-users@...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>
>
>

Hello,
 
            Whoops, no I didn't have it working - ran the wrong test
(bit tired that day).  The issue is that I can't use
objInterp.exec(strScript) as exec doesn't return an object - it just
returns void.  The current way I have to do register a return value,
tell the user to set the result to that value, get it out and then
deregister that value inside my script.  That works but it is very
different for the user as they have to do thing differently when coding
Jython extensions to the system than a ruby extension (haven't tried
groovy yet).
 
            From what I can see - I'm stuck here, can anyone point me to
a potential solution (I'm fairly experienced in CPython as I use it in
my day job and code Java in the evening - contrary to most people ;) )?
 
            Thanks, in advance for your help.
 
Cheers,
 
Neil
---
Neil Benn
CEO Ziath Ltd
http://www.ziath.com
 
-----Original Message-----
From: jython-users-bounces@...
[mailto:jython-users-bounces@...] On Behalf Of
Sidharth Kuruvila
Sent: 04 December 2006 22:53
To: jython-users@...
Subject: Re: [Jython-users] Use of eval
 
Hi Ben,
 
eval is meant for expressions. What you want to use is exec
 
Object objResult = objInterp.exec(strScript);
 
 
On 05-Dec-06, at 2:48 AM, Neil Benn wrote:



Hello,
 
            I am trying to evaluate a script which runs as follows
(using both BSF and JYthonInterp does the same thing):
 
---
 
String strScript = "def test():\n";
strScript += "\treturn 1\n";
strScript += "test()";
 
Object objResult = objInterp.eval(strScript);
 
---
 
However I get the following traceback (this is when run from
JythonInterp), I've snipped the bottom bit off because it is in the unit
test code
 
            Traceback (innermost last):
  (no code object) at line 0
SyntaxError: ('invalid syntax', ('<string>', 1, 1, 'def test():'))
 
            at org.python.core.parser.fixParseError(parser.java)
            at org.python.core.parser.parse(parser.java)
            at org.python.core.Py.compile_flags(Py.java)
            at org.python.core.Py.compile_flags(Py.java)
            at org.python.core.__builtin__.eval(__builtin__.java)
            at org.python.core.__builtin__.eval(__builtin__.java)

            at
org.python.util.PythonInterpreter.eval(PythonInterpreter.java)
            at
uk.co.ziath.datapaq.server.scripting.JythonScriptProcessor.evaluateScrip
t(JythonScriptProcessor.java:76)
            at
uk.co.ziath.datapaq.server.scripting.test.JythonScriptProcessorTest.test
MethodJythonScript(JythonScriptProcessorTest.java:75)
<snip>
 
---
 
            When I attempt to run a simple script such as 3* 4 and
evaluate it, I get back 12 as I would expect.  However it seems that any
multi-line script fails on me.  Is it true that I cannot use a
multi-line script in an evaluate statement (I know I can do it in an
execute statement)?
 
            Thanks for your help.
 
Cheers,
 
Neil
 
 
---
Neil Benn
CEO Ziath Ltd
http://www.ziath.com
 
------------------------------------------------------------------------
-
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share
your
opinions on IT & business topics through brief surveys - and earn cash
http://www.techsay.com/default.php?page=join.php
<http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVD
EV_______________________________________________>
&p=sourceforge&CID=DEVDEV_______________________________________________
Jython-users mailing list
Jython-users@...
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Something I've done to address this sort of thing is to call the
function from a different one which you write yourself, which does the
registerBean() so that the user doesn't have to.&nbsp; E.g. in Java have a
template like:<br>
<pre>import theFunctions # pretend all functions are defined in the same file

result = theFunctions.%s()
bsf.registerBean("result", result)
</pre>
then in Java if you have a method that takes a function name you would
like to run, you just have to do something like [untested code]:<br>
<pre>Object execJythonFunction(String funcName)
{
  StringWriter sw = new StringWriter();
  PrintWriter pw = new PrintWriter(sw);
  pw.printf(theTemplate, funcName);
  String actualCode = sw.toString();
  bsfMgr.exec(..., actualCode);
  Object result = bsfMgr.lookupBean("result");
  return result;
}
</pre>
And now, the user's function doesn't need to do any registerBean
stuff.&nbsp; All it needs to do is compute some value in the function and
return it, and the template code does the rest.&nbsp; Does that make sense?<br>
<br>
Andy<br>
<br>
Neil Benn wrote:
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  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
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 style="font-size: 10pt; font-family: Arial; color: navy;"><span
 style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Whoops,
no I didn&#8217;t have it working &#8211; ran the wrong test (bit tired that
day).<span style="">&nbsp; </span>The issue is that I can&#8217;t
use <span class="SpellE"><span class="GramE">objInterp.exec</span></span><span
 class="GramE">(</span><span class="SpellE">strScript</span>) as exec
doesn&#8217;t return
an object &#8211; it just returns void.<span style="">&nbsp;
  </span>The current way I have to do register a return value, tell the
user to
set the result to that value, get it out and then deregister that value
inside
my script.<span style="">&nbsp; </span>That works but it is
very different for the user as they have to do thing differently when
coding <span class="SpellE">Jython</span> extensions to the system
than a ruby extension (haven&#8217;t
tried groovy yet).<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><span
 style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>From
what I can see &#8211; I&#8217;m stuck here, can anyone point me to a potential
solution (I&#8217;m fairly experienced in <span class="SpellE">CPython</span>
as
I use it in my day job and code Java in the evening &#8211; contrary to most
people ;) )?<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><span
 style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Thanks,
in advance for your help.<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">Cheers,<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">Neil<o:p></o:p></span></font></p>
  <div>
  <p class="MsoAutoSig"><font color="navy" face="Times New Roman"
 size="3"><span style="font-size: 12pt; color: navy;" lang="EN-GB">---<o:p></o:p></span></font></p>
  <p class="MsoAutoSig"><font color="navy" face="Times New Roman"
 size="3"><span style="font-size: 12pt; color: navy;" lang="EN-GB">Neil
Benn<o:p></o:p></span></font></p>
  <p class="MsoAutoSig"><font color="navy" face="Times New Roman"
 size="3"><span style="font-size: 12pt; color: navy;" lang="EN-GB">CEO
Ziath Ltd<o:p></o:p></span></font></p>
  <p class="MsoAutoSig"><font color="navy" face="Times New Roman"
 size="3"><span style="font-size: 12pt; color: navy;" lang="EN-GB"><a class="moz-txt-link-freetext" href="http://www.ziath.com">http://www.ziath.com</a><o:p></o:p></span></font></p>
  </div>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Tahoma"
 size="2"><span style="font-size: 10pt; font-family: Tahoma;">-----Original
Message-----<br>
  <b><span style="font-weight: bold;">From:</span></b>
<a class="moz-txt-link-abbreviated" href="mailto:jython-users-bounces@...>
[<a class="moz-txt-link-freetext" href="mailto:jython-users-bounces@...>] <b><span
 style="font-weight: bold;">On Behalf Of </span></b>Sidharth Kuruvila<br>
  <b><span style="font-weight: bold;">Sent:</span></b> 04 December 2006
22:53<br>
  <b><span style="font-weight: bold;">To:</span></b>
<a class="moz-txt-link-abbreviated" href="mailto:jython-users@...>
  <b><span style="font-weight: bold;">Subject:</span></b> Re:
[Jython-users] Use of
eval</span></font></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;">Hi Ben,<o:p></o:p></span></font></p>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"><o:p>&nbsp;</o:p></span></font></p>
  </div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;">eval is
meant for
expressions. What you want to use is exec<o:p></o:p></span></font></p>
  </div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"><o:p>&nbsp;</o:p></span></font></p>
  </div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><span
 class="apple-style-span"><font face="Arial" size="1"><span
 style="font-size: 8pt; font-family: Arial;" lang="EN-GB">Object
objResult = objInterp.exec(strScript);</span></font></span><o:p></o:p></p>
  </div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"><o:p>&nbsp;</o:p></span></font></p>
  </div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"><o:p>&nbsp;</o:p></span></font></p>
  <div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;">On
05-Dec-06, at 2:48 AM,
Neil Benn wrote:<o:p></o:p></span></font></p>
  </div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"><br
 style="">
<!--[if !supportLineBreakNewLine]--><br style="">
<!--[endif]--><o:p></o:p></span></font></p>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:SMARTTAGTYPE
 namespaceuri="urn:schemas-microsoft-com:office:smarttags"
 name="PersonName">Hello,<O:P></O:P></O:SMARTTAGTYPE></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>I
am trying to evaluate a script which runs as follows (using both BSF
and <span class="spelle">JYthonInterp</span> does the same thing):<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB">---<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font color="black"
 face="Courier New" size="2"><span courier=""><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: black;">String
  <span class="spelle">strScript</span>
= </span></span></font><font color="#2a00ff" face="Courier New"
 size="2"><span courier=""><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: rgb(42, 0, 255);">"def
  <span class="grame">test(</span>):\n"</span></span></font><font
 color="black" face="Courier New" size="2"><span courier=""><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: black;">;</span></span></font><o:p></o:p></p>
  <span courier=""><O:P></O:P></span>
  <p class="MsoNormal" style="margin-left: 36pt;"><span class="grame"><font
 color="black" face="Courier New" size="2"><span courier=""><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: black;">strScript</span></span></font></span><font
 color="black" face="Courier New" size="2"><span courier=""><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: black;"> +=
  </span></span></font><font color="#2a00ff" face="Courier New" size="2"><span
 courier=""><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: rgb(42, 0, 255);">"\<span
 class="spelle">treturn</span> 1\n"</span></span></font><font
 color="black" face="Courier New" size="2"><span courier=""><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: black;">;</span></span></font><o:p></o:p></p>
  <span courier=""><O:P></O:P></span>
  <p class="MsoNormal" style="margin-left: 36pt;"><span class="grame"><font
 color="black" face="Courier New" size="2"><span courier=""><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: black;">strScript</span></span></font></span><font
 color="black" face="Courier New" size="2"><span courier=""><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: black;"> +=
  </span></span></font><font color="#2a00ff" face="Courier New" size="2"><span
 courier=""><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: rgb(42, 0, 255);">"test()"</span></span></font><font
 color="black" face="Courier New" size="2"><span courier=""><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: black;">;<O:P></O:P></span></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font color="black"
 face="Courier New" size="2"><span courier=""><O:P><span
 style="font-size: 10pt; font-family: &quot;Courier New&quot;; color: black;">&nbsp;</span></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB">Object <span class="spelle">objResult</span>
= <span class="grame">objInterp.eval(</span><span class="spelle">strScript</span>);<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB">---<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB">However I get the following <span class="spelle">traceback</span>
(this is when run from <span class="spelle">JythonInterp</span>),
I&#8217;ve snipped the bottom bit off because it is in the unit test code<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="spelle">Traceback</span>
(innermost last):<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp; </span>(<span class="grame">no</span>
code
object) at line 0<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><span class="spelle"><font
 face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial;" lang="EN-GB">SyntaxError</span></font></span><font
 face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial;" lang="EN-GB">: ('invalid
syntax', ('&lt;string&gt;', 1, 1, 'def <span class="grame">test(</span>):'))<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="grame">at</span>
  <span class="spelle">org.python.core.parser.fixParseError</span>(<span
 class="spelle">parser.java</span>)<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="grame">at</span>
  <span class="spelle">org.python.core.parser.parse</span>(<span
 class="spelle">parser.java</span>)<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="grame">at</span>
  <span class="spelle">org.python.core.Py.compile_flags</span>(<span
 class="spelle">Py.java</span>)<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="grame">at</span>
  <span class="spelle">org.python.core.Py.compile_flags</span>(<span
 class="spelle">Py.java</span>)<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="grame">at</span>
  <span class="spelle">org.python.core.__builtin__.eval</span>(__<span
 class="spelle">builtin__.java</span>)<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="grame">at</span>
  <span class="spelle">org.python.core.__builtin__.eval</span>(__<span
 class="spelle">builtin__.java</span>)<span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  </span><O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="grame">at</span>
  <span class="spelle">org.python.util.PythonInterpreter.eval</span>(<span
 class="spelle">PythonInterpreter.java</span>)<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="grame">at</span>
uk.co.ziath.datapaq.server.scripting.JythonScriptProcessor.evaluateScript(JythonScriptProcessor.java:76)<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="grame">at</span>
uk.co.ziath.datapaq.server.scripting.test.JythonScriptProcessorTest.testMethodJythonScript(JythonScriptProcessorTest.java:75)<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB">&lt;<span class="grame">snip</span>&gt;<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB">---<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>When
I attempt to run a simple script such as 3* 4 and evaluate it, I get
back 12 as
I would expect.<span style="">&nbsp; </span>However it seems
that any multi-line script fails on me.<span style="">&nbsp;
  </span>Is it true that I cannot use a multi-line script in an
evaluate
statement (I know I can do it in an execute statement)?<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><span style="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Thanks
for your help.<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB">Cheers,<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB">Neil<O:P></O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font face="Arial"
 size="2"><span style="font-size: 10pt; font-family: Arial;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span></font><o:p></o:p></p>
  <p class="MsoAutoSig" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"
 lang="EN-GB">---<O:P></O:P></span><o:p></o:p></font></p>
  <p class="MsoAutoSig" style="margin-left: 36pt;"><ST1:PERSONNAME><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"
 lang="EN-GB">Neil Benn</span><o:p></o:p></font></ST1:PERSONNAME></p>
  <O:P></O:P>
  <p class="MsoAutoSig" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"
 lang="EN-GB">CEO Ziath Ltd<O:P></O:P></span><o:p></o:p></font></p>
  <p class="MsoAutoSig" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"
 lang="EN-GB"><a href="http://www.ziath.com">http://www.ziath.com</a><O:P></O:P></span><o:p></o:p></font></p>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"
 lang="EN-GB"><O:P>&nbsp;</O:P></span><o:p></o:p></font></p>
  </div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;">-------------------------------------------------------------------------<o:p></o:p></span></font></p>
  </div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;">Take
Surveys. Earn Cash.
Influence the Future of IT<o:p></o:p></span></font></p>
  </div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;">Join
SourceForge.net's
Techsay panel and you'll get the chance to share your<o:p></o:p></span></font></p>
  </div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;">opinions
on IT &amp;
business topics through brief surveys - and earn cash<o:p></o:p></span></font></p>
  </div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"><a
 href="http://www.techsay.com/default.php?page=join.php&amp;p=sourceforge&amp;CID=DEVDEV_______________________________________________">http://www.techsay.com/default.php?page=join.php&amp;p=sourceforge&amp;CID=DEVDEV_______________________________________________</a><o:p></o:p></span></font></p>
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  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;">Jython-users
mailing list<o:p></o:p></span></font></p>
  </div>
  <div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"><a
 href="mailto:Jython-users@...>
  </div>
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  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"><a
 href="https://lists.sourceforge.net/lists/listinfo/jython-users">https://lists.sourceforge.net/lists/listinfo/jython-users</a><o:p></o:p></span></font></p>
  </div>
  </div>
  <p class="MsoNormal" style="margin-left: 36pt;"><font
 face="Times New Roman" size="3"><span style="font-size: 12pt;"><o:p>&nbsp;</o:p></span></font></p>
  </div>
  </div>
  <pre wrap="">
<hr size="4" width="90%">
-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT &amp; business topics through brief surveys - and earn cash
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Building on Michael's idea:(Warning untested code)

String code = "\
def test():\n\
    return 1\n\
return test()"; \\I've added a return

.
.
.

String wrapperFuncCode =
 "def wrapperFunc():\n"+
code.replaceAll("\\n", "\n    ");
obInterp.exec(magicFuncCode);
try{
    return objInterp.eval("wrapperFunc()");
}finally{
    objInterp.exec("del wrapperFunc");//Probably unnecessary
}


On 12/8/06, Michael Chisholm <chisholm@...> wrote:
>
>  Something I've done to address this sort of thing is to call the function
> from a different one which you write yourself, which does the registerBean()
> so that the user doesn't have to.  E.g. in Java have a template like:
>
> import theFunctions # pretend all functions are defined in the same file
>
> result = theFunctions.%s()
> bsf.registerBean("result", result)
>
> then in Java if you have a method that takes a function name you would
> like to run, you just have to do something like [untested code]:
>
> Object execJythonFunction(String funcName)
> {
>   StringWriter sw = new StringWriter();
>   PrintWriter pw = new PrintWriter(sw);
>   pw.printf(theTemplate, funcName);
>   String actualCode = sw.toString();
>   bsfMgr.exec(..., actualCode);
>   Object result = bsfMgr.lookupBean("result");
>   return result;
> }
>
> And now, the user's function doesn't need to do any registerBean stuff.
> All it needs to do is compute some value in the function and return it, and
> the template code does the rest.  Does that make sense?
>
> Andy
> Neil Benn wrote:
>