ImportError: no module named _CRFPP in Python 2.7.6

Question

I installed CRF++0.58 in Python 2.7.6

When I try to import I have the following message:

    >>> import CRFPP
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "CRFPP.py", line 42, in <module>
        _CRFPP = swig_import_helper()
      File "CRFPP.py", line 34, in swig_import_helper
        import _CRFPP
    ImportError: No module named _CRFPP
    >>>

The procedure to install is described in the README file in python directory of CRF++0.58, and is:

  $ python setup.py build
  $ sudo python setup.py install

This placed in the directory /usr/local/lib/python2.7/dist-packages/ :

CRFPP.py
CRFPP.pyc

_CRFPP.so

The directory /usr/local/lib/python2.7/dist-packages/ is in the sys.path

In the CRFPP.py in the setup directory contains, in its begin, the following procedure:

#This file was automatically generated by SWIG (http://www.swig.org).
# Version 2.0.4
#
# Do not make changes to this file unless you know what you are doing--modify
# the SWIG interface file instead.

from sys import version_info
if version_info >= (2,6,0):
    def swig_import_helper():
        from os.path import dirname
        import imp
        fp = None
        try:
            fp, pathname, description = imp.find_module('_CRFPP',[dirname(__file__)])
        except ImportError:
            import _CRFPP
            return _CRFPP
        if fp is not None:
            try:
                _mod = imp.load_module('_CRFPP', fp, pathname, description)
            finally:
                fp.close()
            return _mod
    _CRFPP = swig_import_helper()
    del swig_import_helper
else:
    import _CRFPP
del version_info

imp does not find _CRFPP.so, but found CRFPP.py:

    >>> import imp
    >>> imp.find_module("_CRFPP")
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    ImportError: No module named _CRFPP

    >>> imp.find_module("CRFPP")
    (<open file '/usr/local/lib/python2.7/dist-packages/CRFPP.py', mode 'U' at 0x7f7748e4a540>, '/usr/local/lib/python2.7/dist-packages/CRFPP.py', ('.py', 'U', 1))

score 0 · Answer 1 · edited May 23 '17 at 12:29

The solution is in:

Python error "ImportError: No module named"

Answer: https://stackoverflow.com/a/23964457/5283795

posted in May 30 '14 at 22:50 by KrisWebDev :

sudo chmod 755 /usr/local/lib/python2.7/dist-packages/*.so

After this I imported the module.

Initially the module was with the following attributes:

-rwxrwx--- 1 root staff 255671 Jul 22 2014 _CRFPP.so

After the command:

-rwxr-xr-x 1 root staff 255671 Jul 22 2014 _CRFPP.so

ImportError: no module named _CRFPP in Python 2.7.6

1 Answers1