I am trying to write some code to make an automation that will populate a date field that is 3 days from now I have this code 

record.x_studio_three_days_after_quotation_sent = datetime.datetime.now () + datetime.timedelta(days=3	​
​

but it gives me an error: " forbidden opcode(s) in 'record.x_studio_three_days_after_quotation_sent = datetime.datetime.now () + datetime.timedelta(days=3)': STORE_ATTR"

I am only using studio not sh. Does anyone have any ideas?