$ sudo pip install dot2tex
Downloading/unpacking dot2tex
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/threading.py", line 504, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 243, in _get_queued_page
    for link in page.rel_links():
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 515, in rel_links
    for url in self.scraped_rel_links():
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 542, in scraped_rel_links
    url = match.group(1) or match.group(2) or match.group(3)
IndexError: no such group

  Downloading dot2tex-2.8.7.tar.gz (571Kb): 571Kb downloaded
  Running setup.py egg_info for package dot2tex

Requirement already satisfied (use --upgrade to upgrade): pyparsing in /usr/local/lib/python2.7/dist-packages/pyparsing-2.0.2-py2.7.egg (from dot2tex)
Installing collected packages: dot2tex
  Running setup.py install for dot2tex
    changing mode of build/scripts-2.7/dot2tex from 644 to 755

    changing mode of /usr/local/bin/dot2tex to 755
    Installing dot2tex script to /usr/local/bin
Successfully installed dot2tex
Cleaning up...

$ dot2tex
Traceback (most recent call last):
  File "/usr/local/bin/dot2tex", line 9, in <module>
    load_entry_point('dot2tex==2.8.7', 'console_scripts', 'dot2tex')()
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 337, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2279, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 1989, in load
    entry = __import__(self.module_name, globals(),globals(), ['__name__'])
  File "/usr/local/lib/python2.7/dist-packages/dot2tex/__init__.py", line 36, in <module>
    import dot2tex as d2t
  File "/usr/local/lib/python2.7/dist-packages/dot2tex/dot2tex.py", line 47, in <module>
    import dotparsing
  File "/usr/local/lib/python2.7/dist-packages/dot2tex/dotparsing.py", line 26, in <module>
    from pyparsing import  (Literal, CaselessLiteral, Word, Upcase, OneOrMore, ZeroOrMore,
ImportError: cannot import name _noncomma