CircleCI python module import error after successful installation

I wrote some tests, and I want it to be ran on CircleCI.

I added circle.yml file to my repo which contains:

dependencies:
  pre:
    - sudo apt-get install libpcap-dev python-dev
    - sudo pip install pymongo numpy pcapy dpkt

And pushed to remote. The dependencies installation ran successfully: success

But when the tests are starting to run there is a failure: fail

On my local machine it is running fine.

Thanks in advance.