Python子流程语言环境设置

Question

When executing opennlp POSTagger with subprocess.call in python, the result goes wrong. But when I put the same command into my terminal, the result is correct.

After some testing , I think this is because opennlp failed to load the model file correctly, so what's the problem? The model is trained in Chinese and I use python 2.7.

OpenNLP runs without any warnings or errors, but it tags the input sentence totally wrong. It gives the correct tags in the terminal. I guess it's an encoding problem but I'm not sure.

Here is the code. It's nothing special and contains only ascii chars. Print this command and copy it to terminal, the result is correct.

Now I know it's the locale/encoding problem (debug the script by strace). But it's of no use to set the python locale to en_US.utf-8 or zh_CN.utf-8 . My shell locale setting is zh_CN.utf-8 .

opennlp_path = './opennlp/bin/opennlp'
pos_model = 'train.pos.model'
pos_predict_cmd = [opennlp_path, 'POSTagger', pos_model]
subproc = call(pos_predict_cmd)

Answer 1

首先，看看http://docs.python.org/library/subprocess.html#using-the-subprocess-module ，阅读一次或两次，然后尝试使用call(pos_predict_cmd, shell=True)看看是否这样可行。