Getting Error in my where clause using cursor in arcpy.

[broy06]

I'm currently using Arcmap 10.7 version. I'm guessing my error is in the where clause. Could anyone please help me to get rid from this problem?. I'm not able to print the cursor part i.e., 

Print (MEASUREDLENGTH_Risk_Score) # Not getting the value of MEASUREDLENGTH

Below is my code-:

import arcpy
arcpy.env.workspace = "D:\pipe\map.gdb"
featureClass_1 = "P_Pipes"
Table_Pipe = "Pipe_Risk"
fieldNames_1 = [ "Material" , "OPERATINGPRESSURE" , "MEASUREDLENGTH" , "INSTALLATIONDATE", "Risk_Score"]
fieldNames_Pipe = ["Material" , "OPERATINGPRESSURE" , "MEASUREDLENGTHLOWERLIMIT" ,"MEASUREDLENGTHUPPERLIMIT" , "INSTALLATIONDATELOWERLIMIT" , "INSTALLATIONDATEUPPERLIMIT" , "OVERALLRISKSCORE"]


def Pipe_Risk_Score(Material, OPERATINGPRESSURE, MEASUREDLENGTH,  INSTALLATIONDATE):

    ML_Out_fields = ["MEASUREDLENGTHLOWERLIMIT" ,"MEASUREDLENGTHUPPERLIMIT" , "OVERALLRISKSCORE"]
    ML_where_Clause = "MEASUREDLENGTHLOWERLIMIT <= " + MEASUREDLENGTH + " and MEASUREDLENGTHUPPERLIMIT >= " + MEASUREDLENGTH 
    print(ML_where_Clause)
    
    Table_Pipe_Cursor = arcpy.da.SearchCursor(Table_Pipe, ML_Out_fields, ML_where_Clause)
    for row in Table_Pipe_Cursor:
        lst.append(row[2])
        MEASUREDLENGTH_Risk_Score = row[2]
        print ((MEASUREDLENGTH_Risk_Score))

Pipe_Risk_Score("Material" , "OPERATINGPRESSURE" , "MEASUREDLENGTH" ,  "INSTALLATIONDATE")

[DanPatterson]

Select Layer By Attribute (Data Management)—ArcGIS Pro | Documentation

from there, this is an example of a where clause for a string

"[NAME] = 'California'"

What do you get if you do an sql query on the data manually?  Check it out and copy the syntax

[Anonymous User]

It looks like you are trying to use string formatting for the variable but forgot the .format().

ML_where_Clause = "MEASUREDLENGTHLOWERLIMIT <= {0} and MEASUREDLENGTHUPPERLIMIT >= {0}".format(MEASUREDLENGTH)

[broy06]

Sir, this statement gives me a blank screen with no output.

[Anonymous User]

You are passing "MEASUREDLENGTH" as a string variable to MEASUREDLENGTH in the function call, but are trying to use it as integer in the whereclause.  Where is the actual value of MEASUREDLENGTH for the sql coming from?

[broy06]

Yes. See, basically there is 1 feature class & 1 lookup table (Created in a same gdb). The actual value of "MEASUREDLENGTH" is in feature class attributes. but i have assigned some score for the same in the form of range in look up table and now i am calling it from the lookup table. 

[GKmieliauskas]

Hi,

Change 

 + and "MEASUREDLENGTHUPPERLIMIT >= "

to

 + " and MEASUREDLENGTHUPPERLIMIT >= "

[broy06]

Hello, Earlier i tried using the same method which you suggested me but getting no output only able to see the print statement of where clause, not getting the value of "MEASUREDLENGTH" which has a double data type values, which i want. Please suggest me, what i'm lacking of?

[Anonymous User]

You are passing strings into your functions:

Pipe_Risk_Score("Material" , "OPERATINGPRESSURE" , "MEASUREDLENGTH" ,  "INSTALLATIONDATE")

OPERATINGPRESSURE is assigned "OPERATINGPRESSURE"

MEASUREDLENGTH is assigned "MEASUREDLENGTH"

INSTALLATIONDATE is assigned "INSTALLATIONDATE"

If you want the float / date that is assigned to MEASUREDLENGTH (or any of the other values), you need to remove the quotes in the function call so it passes the variables and not "OPERATINGPRESSURE" , "MEASUREDLENGTH" , "INSTALLATIONDATE" strings. For example:

OPERATINGPRESSURE = 36

MEASUREDLENGTH = 12

INSTALLATIONDATE = datetime.strptime('08/03/2021 12:43:34')

Pipe_Risk_Score(Material, OPERATINGPRESSURE, MEASUREDLENGTH,  INSTALLATIONDATE)

OPERATINGPRESSURE is assigned 36

MEASUREDLENGTH is assigned 12

INSTALLATIONDATE is assigned datetime 08/03/2021 12:43:34

We cant tell how you are assigning the variables from the lookup table from the code snippet you provided above so if you are having issues, it would be helpful to post the full code and any error messages that you are getting.

[broy06]

Sir, Actually while calling a function without "Material" (quotes) , it's showing me "Name error", Name: Material is not defined and so on. okay I'm updating my full code in the question along with the lookup table & feature class attribute pic.  Thank you, Please have a look  then.                                                                   Error:                                                                                                                                                                                                                  Pipe_Risk_Score("Material" , "OPERATINGPRESSURE" , "MEASUREDLENGTH" , INSTALLATIONDATE)
NameError: name 'INSTALLATIONDATE' is not defined