ubuntu 18.04 run python3.7

install

sudo apt install python3.7 python3-venv python3.7-venv
python3.7 -m venv py37-venv
. py37-venv/bin/activate
sudo apt install build-essential libssl-dev zlib1g-dev libncurses5-dev libncursesw5-dev libreadline-dev libsqlite3-dev libgdbm-dev libdb5.3-dev libbz2-dev libexpat1-dev liblzma-dev tk-dev libffi-dev

# run your commend
#  ...

deactivate # exit

In your project

. py37-venv/bin/activate
# cd your project path
# sudo apt install build-essential libssl-dev zlib1g-dev libncurses5-dev libncursesw5-dev libreadline-dev libsqlite3-dev libgdbm-dev libdb5.3-dev libbz2-dev libexpat1-dev liblzma-dev tk-dev libffi-dev
 
pip3.7 install  wheel
pip3.7 install -r  requirements.txt
pip3.7 install -r test-requirements.txt
 
# run your testcase
python -m unittest run cyborg.tests.unit.objects.test_extarq.TestExtARQObject

deactivate # exit

Example:　　

cat testcase.py

from functools import wraps
from concurrent.futures import  ThreadPoolExecutor
import six
import time
import traceback


from oslotest import base


def wrap_job_tb(msg="Reason: %s"):
    """Wrap a function with a is_job tag added, and catch Excetpion."""
    def _wrap_job_tb(method):
        @wraps(method)
        def _impl(self, *args, **kwargs):
            try:
                output = method(self, *args, **kwargs)
            except Exception as e:
                print(msg, six.text_type(e))
                print(traceback.format_exc())
                raise Exception("just a test error")
            return output
        setattr(_impl, "is_job", True)
        return _impl
    return _wrap_job_tb


@wrap_job_tb("Error during job.")
def job1(t1=0):
    print(time.time())
    print("sleep %s second" % t1)
    time.sleep(t1)
    print(time.time())
    return "Hello, world"
    raise Exception("Error")


def spawn(func, *args, **kwargs):
    """Passthrough method for ThreadPoolExecutor.

    It will also grab the context from the threadlocal store and add it to
    the store on the new thread.  This allows for continuity in logging the
    context when using this method to spawn a new thread.
    """
    # Ref: https://pythonhosted.org/futures/
    max_workers = kwargs.pop("workers", 2)
    executor = ThreadPoolExecutor(max_workers=max_workers)
    future = executor.submit(func, *args, **kwargs)
    return executor, future


class TestCase(base.BaseTestCase):
    def setUp(self):
        super(TestCase, self).setUp()

    def test_foo(self):
        print("Test foo")

    def test_bar(self):
        print("Test bar")

    def test_job(self):
        ex, f = spawn(job1, 1)
        ex.shutdown(wait=False)
        f.result()

run the example:

. py37-venv/bin/activate
# cd your project path
  
pip3.7 install  wheel
pip3.7 install  six oslotest 

python -m unittest run testcase

deactivate # exit

This setting is used for the conflict between eventlet and ThreadPoolExecutor

Modules with known eventlet monkey patching issues were imported prior to eventlet monkey patching: urllib3, oslo_context.c$
ntext. This warning can usually be ignored if the caller is only importing and not executing nova code.