Using timedelta to add days to a start date

JasmineSpring

Hello

I am trying to create a scriptool  to select the survey data after a certain start date

If Annual_Growth is 10 I want it to add 20 days to the  Initial_Date to give the start date

If Annual_Growth is 20 I want it to add 50 days to the  Initial_Date to give the start date

 

 

 

Survey_Data = arcpy.GetParameterAsText(0) 
Annual_Growth = arcpy.GetParameterAsText(1) 
Initial_Date = arcpy.GetParameterAsText(2)  #Date input (date format is dd/mm/yyyy)
T_date = datetime.datetime(Inital_Date)
start_date = T_date + datetime.timedelta(days = num_days)
if Annual_Growth ==10: num_days = 20
elif Annual_Growth == 20: num_days = 50
Where_Clause = "DateTimeUTC >= '{}'".format(start_date)
arcpy.management.SelectLayerByAttribute(Survey_Data, "NEW_SELECTION", Where_Clause)

 

 

 

The first issue I run into is that the initial date input is perhaps in the wrong format for timedelta to add the days ?? Any help would be appreciated. Thank you

JasmineSpring

Thanks for reply Tom. Yep thats where I started also. Got there in the end. In a roundabout way.

 

 

 

 

Survey_Data = arcpy.GetParameterAsText(0)     
Date_last_treatment = arcpy.GetParameterAsText(1)
AGrowth = arcpy.GetParameterAsText(2)
Initial_date=datetime.datetime.strptime(Date_last_treatment,'%d/%m/%Y')
Growth = int(AGrowth)
if Growth == 10:
    Ndays = 10
elif Growth == 20:
    Ndays = 20
N_date = Intial_date + datetime.timedelta(days = Ndays)
Start_date= datetime.datetime.strftime(N_date, '%d/%m/%Y')
Start_date1 = "timestamp'{}'".format(Start_date)
Where_Clause = "DateTimeUTC >= {}".format(Start_date1)
arcpy.management.SelectLayerByAttribute(Survey_Data, "NEW_SELECTION", Where_Clause)