[IPython-dev] parallel: BaseException.message has been deprecated

[Brian Granger]

I will have a look at this tonight.  Are you on IRC?

Brian

On Wed, Mar 18, 2009 at 7:52 PM, Ondrej Certik <ondrej at certik.cz> wrote:
> Hi,
>
> if I run this code:
>
> try:
>    print mec.execute("get_tests()")
> except:
>    t, v, tr = sys.exc_info()
>    print t
>    print v
>    print tr
>
> I keep getting this traceback:
>
> /home/ondrej/lib/lib/python/IPython/kernel/error.py:130:
> DeprecationWarning: BaseException.message has been deprecated as of
> Python 2.6
>  s = str(self.message)
> Traceback (most recent call last):
>  File "t.py", line 27, in <module>
>    print v
>  File "/home/ondrej/lib/lib/python/IPython/kernel/error.py", line
> 133, in __str__
>    s = s + '\n' + engine_str + str(et.__name__) + ': ' + str(ev)
> AttributeError: 'str' object has no attribute '__name__'
>
>
> So this patch fixes the deprecation warning:
>
> === modified file 'IPython/kernel/error.py'
> --- IPython/kernel/error.py     2008-06-06 19:41:55 +0000
> +++ IPython/kernel/error.py     2009-03-19 02:38:41 +0000
> @@ -107,7 +107,7 @@
>  class CompositeError(KernelError):
>     def __init__(self, message, elist):
>         Exception.__init__(self, *(message, elist))
> -        self.message = message
> +        self.msg = message
>         self.elist = elist
>
>     def _get_engine_str(self, ev):
> @@ -127,7 +127,7 @@
>             return tb
>
>     def __str__(self):
> -        s = str(self.message)
> +        s = str(self.msg)
>         for et, ev, etb in self.elist:
>             engine_str = self._get_engine_str(ev)
>             s = s + '\n' + engine_str + str(et.__name__) + ': ' + str(ev)
>
>
>
>
> Now I only get this traceback:
>
>  import struct, sets, time
> <class 'IPython.kernel.error.CompositeError'>
> Traceback (most recent call last):
>  File "t.py", line 27, in <module>
>    print v
>  File "/home/ondrej/lib/lib/python/IPython/kernel/error.py", line
> 133, in __str__
>    s = s + '\n' + engine_str + str(et.__name__) + ': ' + str(ev)
> AttributeError: 'str' object has no attribute '__name__'
>
> a quick debugging shows:
>
> ipdb> p et
> 'exceptions.NameError'
> ipdb> p type(et)
> <type 'str'>
>
> and str doesn't have any .__name__. So a fix could be along these lines:
>
> -            s = s + '\n' + engine_str + str(et.__name__) + ': ' + str(ev)
> +            s = s + '\n' + engine_str + et + ': ' + str(ev)
>
>
> Now my script above shows the actual error:
>
> one or more exceptions from call to method: execute
> [Engine Exception]exceptions.NameError: global name '__IPYTHON__' is not defined
> [Engine Exception]exceptions.NameError: global name '__IPYTHON__' is not defined
> [Engine Exception]exceptions.NameError: global name '__IPYTHON__' is not defined
> [Engine Exception]exceptions.NameError: global name '__IPYTHON__' is not defined
> [Engine Exception]exceptions.NameError: global name '__IPYTHON__' is not defined
> [Engine Exception]exceptions.NameError: global name '__IPYTHON__' is not defined
> [Engine Exception]exceptions.NameError: global name '__IPYTHON__' is not defined
> [Engine Exception]exceptions.NameError: global name '__IPYTHON__' is not defined
>
>
> So I tried to get the line which goes wrong, by following the docs:
>
> http://ipython.scipy.org/doc/nightly/html/parallel/parallel_multiengine.html#parallel-exceptions
>
> by using .raise_exception()
>
> try:
>    print mec.execute("get_tests()")
> except:
>    t, v, tr = sys.exc_info()
>    print t
>    print v
>    print tr
>    print dir(v)
>    v.raise_exception()
>
> but I only got:
>
> Traceback (most recent call last):
>  File "t.py", line 30, in <module>
>    v.raise_exception()
>  File "/home/ondrej/lib/lib/python/IPython/kernel/error.py", line
> 157, in raise_exception
>    raise et, ev, etb
> TypeError: exceptions must be classes or instances, not str
>
>
> So I'll try to debug it by some other methods to see what went wrong.
>
> Ondrej
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