[IronPython] Embedding & Charsets

Michael Foord fuzzyman at voidspace.org.uk
Wed Mar 25 13:03:13 PDT 2009


Igor Elyas wrote:
> Ops
>  
> Deep in code on returned value  used Python str() function and looks like:
>  str(self._reader.GetString(self._idx))
>  

You can't call str on a string if it contains non-ascii characters. :-)

(and why would you need to...)

Michael

> That correct situation ?
>
> *From:* Igor Elyas <mailto:igor_elyas at hotmail.com>
> *Sent:* Wednesday, March 25, 2009 9:17 PM
> *To:* Users at lists.ironpython.com <mailto:Users at lists.ironpython.com>
> *Subject:* [IronPython] Embedding & Charsets
>
> Hello
>  
> I'm use IronPython 2.0.1 as embedded interpreter for read data from 
> database.
> Code for create Engine:
>  
>             fEngine = Python.CreateEngine();
>             Ops = fEngine.CreateOperations();
>             // core libs
>             fEngine.Runtime.LoadAssembly(typeof(Decimal).Assembly);
>             
> fEngine.Runtime.LoadAssembly(typeof(IValue).Assembly);           
>  
>             // loading ADO.NET driver assemblies
>             LoadAssemblies(from v in 
> EtlBaseCfg.BaseCfg.Element("dlls").Elements("dll") select v.Value);
>  
> After that, I use generated Ipy class for read one value from specific 
> IDbDataReader:
>  
> from ETL.Common.pipes import IValuePipe
> class SelectExtractor(IValuePipe):
>     def __init__(self,adoreader,originId,storage):
>         self._name = originId
>         self._reader = adoreader
>         self._idx = adoreader.GetOrdinal(self._name)
>         self._transport = storage
>     def Do(self, pydict):
>         val = self._transport.Clone()
>         if not self._reader.IsDBNull(self._idx):
>             val.Data = self._reader.GetString(self._idx)
>         if pydict.ContainsKey(self._name):
>             pydict[self._name] = val
>         else:
>             pydict.Add(self._name,val)
>  
> This operation return string with Russian symbols and I get 
> Exception: "'ascii' codec can't decode byte 0 in position 0: ordinal 
> not in range"
> How I can enable unicode .NET strings ?
> Looks like I not initialize IronPython correctly, because this code in 
> Ipy console work fine with Russian charset (Russian Windows), but not 
> sure about other charsets. I need use .NET unicode strings.
>
> Best regards
>
> Igor Elyas
>
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