How to use Python coco API

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Python

neural-network

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After a lot of effort and search, I was finally able to install coco API. I am trying to run a video captioning code. A neural network for video captioning. These are the libraries which are not executing because anaconda coco api doesn't work anymore. But i installed it anyway.
from pycocoevalcap.tokenizer.ptbtokenizer import PTBTokenizer
from pycocoevalcap.bleu.bleu import Bleu
from pycocoevalcap.meteor.meteor import Meteor
from pycocoevalcap.rouge.rouge import Rouge
from pycocoevalcap.cider.cider import Cider

The only line that is executing is this one.
from pycocotools.coco import COCO

How do I run the rest of the libraries?

Thanks in advance.

What I have tried:

I tried to install the coco api. which i finally did it. but now i don't know how to use it.