conftest.py

import pytest

import numpy
import pandas


def pytest_addoption(parser):
    parser.addoption("--skip-slow", action="store_true",
                     help="skip slow tests")
    parser.addoption("--skip-network", action="store_true",
                     help="run network tests")
    parser.addoption("--only-slow", action="store_true",
                     help="run only slow tests")


def pytest_runtest_setup(item):
    if 'slow' in item.keywords and item.config.getoption("--skip-slow"):
        pytest.skip("skipping due to --skip-slow")

    if 'slow' not in item.keywords and item.config.getoption("--only-slow"):
        pytest.skip("skipping due to --only-slow")

    if 'network' in item.keywords and item.config.getoption("--skip-network"):
        pytest.skip("skipping due to --skip-network")


# For running doctests: make np and pd names available

@pytest.fixture(autouse=True)
def add_imports(doctest_namespace):
    doctest_namespace['np'] = numpy
    doctest_namespace['pd'] = pandas