Project
  |-api
  |   \_____  __init__.py
  |   \_____  mailListener.py
  |-tests
      \_____  __init__.py
      \_____  test.py

########################
In mailListener I have:
########################
class MailListener:

    def __init__(self):
        pass

    @staticmethod
    def get_messages_and_service():
        do smth
        return smth

    def get_mail_text(self):
        do smth2
        return smth2

    def get_url_from_mail(self):
        do smth3
        return smth3

    def mark_message_as_read(self):
        do smth4
        return smth4

########################
In test.py I have:
########################
import sys
import os
sys.path.append(os.path.join(os.path.dirname(__file__), '..')) # ANY BETTER WAY TO AVOID THIS?
import api_.mail_listener as ml                                # TO IMPORT THIS???? ;)


os.chdir(r'../api_')
a = ml.MailListener()
k = a.get_mail_text()
f = a.get_url_from_mail()
print(k)
print(f)
g = a.mark_message_as_read()

And the question is: Is there any more ellegant way to import things from api_ package?
I tried many imports, but only this one seems to work.