bad zip file error in POS tagging in NLTK in python
Question: I am new to python and NLTK ..I want to do word tokenization and POS Tagging
in this.I installed Nltk 3.0 in my Ubuntu 14.04 having a default python
2.7.6.First I tried to do tokenization of a simple sentence.But I am getting
an error,telling that "BadZipfile: File is not a zip file".How to solve
this????

..One more doubt..i.e. i gave path as "/usr/share/nltk_data" when i installed
Nltk data (using command line).Some of the pakages couldnt be installed due to
some errors.But it shows other paths when i cheked using command
"nltk.data.path" and the other paths are invalid actually.. why???

I have got 1000 text files.How to code a program for tokenization and POS
tagging for this much files together as a input in python..i dont know..
Please help me...

The way I used commands in python interpretter, is given below in the same
order below

    
    
    Python 2.7.6 (default, Mar 22 2014, 22:59:56) 
    [GCC 4.8.2] on linux2
    Type "copyright", "credits" or "license()" for more information.
    >>> import nltk
    >>> nltk.data.path
    ['/home/ubuntu/nltk_data', '/usr/share/nltk_data',       '/usr/local/share/nltk_data', '/usr/lib/nltk_data', '/usr/local/lib/nltk_data']
    >>> from nltk import pos_tag, word_tokenize
    >>> sentence = "Hello my name is Derek. I live in Salt Lake city."
    >>> sentence
    'Hello my name is Derek. I live in Salt Lake city.'
    >>> word_tokenize(sentence)
    
    Traceback (most recent call last):
    File "<pyshell#5>", line 1, in <module>
    word_tokenize(sentence)
    File "/usr/local/lib/python2.7/dist-packages/nltk/tokenize/__init__.py",      line 93, in word_tokenize
    return [token for sent in sent_tokenize(text)
    File "/usr/local/lib/python2.7/dist-packages/nltk/tokenize/__init__.py",   line 81, in sent_tokenize
    tokenizer = load('tokenizers/punkt/english.pickle')
    File "/usr/local/lib/python2.7/dist-packages/nltk/data.py", line 774, in   load
    opened_resource = _open(resource_url)
    File "/usr/local/lib/python2.7/dist-packages/nltk/data.py", line 888, in _open
    return find(path_, path + ['']).open()
    File "/usr/local/lib/python2.7/dist-packages/nltk/data.py", line 605, in find
    return find(modified_name, paths)
    File "/usr/local/lib/python2.7/dist-packages/nltk/data.py", line 592, in find
    return ZipFilePathPointer(p, zipentry)
    File "/usr/local/lib/python2.7/dist-packages/nltk/compat.py", line 380, in _decorator
    return init_func(*args, **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/nltk/data.py", line 449, in __init__
    zipfile = OpenOnDemandZipFile(os.path.abspath(zipfile))
    File "/usr/local/lib/python2.7/dist-packages/nltk/compat.py", line 380, in _decorator
    return init_func(*args, **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/nltk/data.py", line 946, in __init__
    zipfile.ZipFile.__init__(self, filename)
    File "/usr/lib/python2.7/zipfile.py", line 770, in __init__
    self._RealGetContents()
    File "/usr/lib/python2.7/zipfile.py", line 811, in _RealGetContents
    raise BadZipfile, "File is not a zip file"
    BadZipfile: File is not a zip file
    >>>
    

Thanks in advance.....


Answer: You apparently did not yet run `download_corpora.py` (successfully).

