from myproject import something

.travis.yml
requirements.txt
something.py
tests/
    test_something.py

before_install:
  - "pip install -U pip"
  - "export PYTHONPATH=$PYTHONPATH:$(pwd)"

from setuptools import setup, find_packages

setup(name='MyPythonProject',
      version='0.0.1',
      description='What it does',
      author='',
      author_email='',
      url='',
      packages=find_packages(),
     )

before_install:
  - "pip install -U pip"
  - "python setup.py install"

.travis.yml
requirements.txt
app
|_ tests
|   |_ test_application.py
|_ application.py

script:
    - nosetests --with-coverage --cover-package app