Codeclimate warnings after PR#114

[atherdon]

i'm ready to merge it, but check codeclimate report https://codeclimate.com/github/GroceriStar/food-datasets-csv-parser/pull/114

Originally posted by @atherdon in #114 (comment)

as I think some issues was not addressed - we'll need to handle it as well
@SyeedHasan

[atherdon]

i didn't review all of them, but we can discuss them here.
I assume we can solve some of that problems

[atherdon]

The main issue with these notifications - they tend to be collected and later it's hard to solve them in bulk. This is why it better to address them now