Automatically updated Actual Start Date when Test Cycle created and adding Testcases into Test Cycle

Hi All, 

I have created python code for auto creating Test Cycle and updating test cases into that test cycle but i don't want to update the Actual Start Date and Actual End Date.

I know the documentation for planned start date and planned end date will be filled automatically when you upload your results. But I don't want to update Actual Start Date and Actual End Date is automatically updated.

Is there any procedure for not updating Actual Start Date and Actual End Date.