I can't compare Lpvariable with integer

[YnsDev1]

Details for the issue

I can't compare Lpvariable with integer inside the objective fonction

I get a error msg that I can't compare Lpvariable with integer with <

Useful extra information

I'm opening this issue because:

• [ ] PuLP has a bug
• [ ] PuLP needs a feature
• [ x] PuLP has another problem

I'm using PuLP on:

• [ x] Windows: ( version: ___ )
• [ ] Linux: ( distro: ___ )
• [ ] Mac OS: ( version: ___ )
• [ ] Other: ___

I'm using python version:

• [ ] 2.7
• [ ] 3.4
• [ x] 3.5
• [ ] 3.6
• [ ] Other: ___

I installed PuLP via:

• [x ] pypi (pip install pulp)
• [ ] github (pip install -U git+https://github.com/coin-or/pulp)
• [ ] Other: ___

I have also:

• [ ] Tried out the latest github version: https://github.com/coin-or/pulp
• [ ] Searched for an existing similar issue: https://github.com/coin-or/pulp/issues?utf8=%E2%9C%93&q=is%3Aissue%20

[pchtsp]

could you please provide an example? better yet a completely reproducible one?