natto.api.MeCabError: MECAB_NBEST request type is not set

[himkt]

I got the error when I use break statement in for-loop.

for n in nm.parse("おめぇ誰より卓球好きじゃんよ!", as_nodes=True):
    print(n.feature)
    break

I'm sorry but I don't have any clue about this error...

[himkt]

maybe related to this issue

https://github.com/buruzaemon/natto-py/blob/master/natto/mecab.py#L165

https://github.com/buruzaemon/natto-py/blob/master/natto/mecab.py#L167

[buruzaemon]

Thanks, I will take a closer look at this during this weekend.

Brooke@iPhone

2016/01/22 16:49$B!"(Bhimkt notifications@github.com $B$N%a%C%;!<%8(B:

maybe related to this issue

https://github.com/buruzaemon/natto-py/blob/master/natto/mecab.py#L165

https://github.com/buruzaemon/natto-py/blob/master/natto/mecab.py#L167

$B!=(B Reply to this email directly or view it on GitHub.

[buruzaemon]

Very interesting, this is immediately reproduce-able with @himkt's instructions...!

[himkt]

Oops! It's very strange...

My developent environment is bellow:

OS : OSX 10.11.2 Python: Anaconda3-2.4.0 natto : 0.7.0

If I noticed anything, I would report here.

[buruzaemon]

I was also able to see this error on my Windows 7 laptop, and I am pretty sure I saw this at work on Linux environments as well. Thank you for raising this issue, @himkt.

[buruzaemon]

I think natto needs to catch and handle/ignore the GeneratorExit exception that comes when the generator's close method is invoked.

c.f. http://stackoverflow.com/questions/18637048/avoid-exception-ignored-in-python-enhanced-generator

[buruzaemon]

Looking at Mecab's src/tagger.cpp, line 784, you can see that the error "MECAB_NBEST request type is not set" comes when LatticeImpl::next() is invoked, meaning that this is happening after the Python generator's close method is called.

[buruzaemon]

Solution is to explicitly trap the GeneratorExit error. Fixed, will make this available in the next release, tomorrow.

[himkt]

I see. Thx :+1:

[kohchuanhock]

Is this also fixed for Ubuntu? I seems to be having this exception in 0.8.0

Traceback (most recent call last): File "aiteacher.py", line 48, in <module> main(sys.argv) File "aiteacher.py", line 44, in main print(is_correct(question, user_sentence, correct_sentences, incorrect_sentences)) File "aiteacher.py", line 10, in is_correct return v2.is_match(user_sentence, correct_sentences, incorrect_sentences) File "/home/ubuntu/aiteacher-ai/src/v2.py", line 85, in is_match if compare(input_sentence, correct_sentence): File "/home/ubuntu/aiteacher-ai/src/v2.py", line 31, in compare input_nodes = convert_to_list(nm.parse(input_sentence, as_nodes=True)) File "/home/ubuntu/aiteacher-ai/src/v2.py", line 12, in convert_to_list for n in nodes: File "/usr/local/lib/python2.7/dist-packages/natto/mecab.py", line 413, in __parse_tonodes raise MeCabError(self.__bytes2str(self.__ffi.string(err))) natto.api.MeCabError: MECAB_NBEST request type is not set

[kohchuanhock]

The following code will cause the "natto.api.MeCabError: MECAB_NBEST request type is not set" error

# -*- coding: utf-8 -*- from natto import MeCab

nm = MeCab('-F%m,%f[0],%f[1],%f[8]') for n in nm.parse('私はアシャです', as_nodes=True): print(n.feature)

[himkt]

I have confirmed @kohchuanhock -san's error can be reproduced. This error has occurred when __%f[8]__ is used in the -F option. It may be better to open the new issue.

To: @buruzaemon

[kohchuanhock]

@buruzaemon -san,

Thank you very much for your quick response. I have created new issue. https://github.com/buruzaemon/natto-py/issues/95

Thanks,

[buruzaemon]

Thank you, @himkt. I will have a deeper look into @kohchuanhock's reported error, giving consideration to your steps for reproducing.

On Mon, Sep 18, 2017 at 5:25 PM, himkt notifications@github.com wrote:

I have confirmed @kohchuanhock-san's error can be reproduced. This error has occurred when %f[8] is used in the -F option.

To: @buruzaemon https://github.com/buruzaemon

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