Not working with Python3

[mbeziouch]

Hello,
Still needs pyparsing 1.5.7 which is not compatible with python3!

[catskul]

Pull request here includes upgrade to pyparsing 2.x

#131

[PanderMusubi]

Please merge and release this. I'm also in need of Python 3 implementation. Thanks.

[jessevdk]

The PR was not in a state to be merged. I did put some work in trying to make cldoc compatible with python3 (including upgrading pyparsing). Could you see if latest master works for you?