[Python] python unit test mocking - dynamically evaluating instance variable

I have a python file with instance variables that are getting assigned at run time, as below; now the challenge is that I need to mock this instance variable's external library method call "client.x". I tried patch

Sample Code below


import os
from unittest.mock import patch

import pytest
@pytest.fixture()
def setup():
os.environ["SOME_REGION"] = "abc"
os.environ["GIT_CREDS"] = "GIT_CREDS"
os.environ["GIT_ORG"] = "some-org"
os.environ["GIT_REPO"] = 'some-repo'
os.environ['GIT_ENDPOINT'] = 'https://dummy'

@pytest.fixture
def util(setup):
from abc import GitCommons
return GitCommons()


@patch("client.get_secret_value")
def test_read_template_from_git(util, setup):
util.read_template_from_git("test", "test")


The below is instance code from file that is under test

session = boto3.session.Session()
client = session.client(
service_name='someValue',
region_name=SOME_REGION
)
get_secret_value_response = client.get_secret_value(
SecretId=SOME_ID
)
git_token = get_secret_value_response['someString']


Please guide me if any of you have experience in similar mocking. Please let me know if you need any more details.

I tried @patch("client.get_secret_value")

I am getting error as " ModuleNotFoundError: No module named 'client'"

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