topic Re: error: global name 'Primary_OH' is not defined in Python Questions

error: global name 'Primary_OH' is not defined

RickHawkins — Fri, 27 Dec 2019 19:14:57 GMT

I am trying to run my program and when i get to this part of the program

I get the error that global name 'Primary_OH is not defined. Can someone look at my code and tell what i need to do to fix this.

Thanks

Re: error: global name 'Primary_OH' is not defined

JoeBorgione — Fri, 27 Dec 2019 20:01:56 GMT

Your code would be a lot easier to trouble shoot if you paste it into the syntax highlighter rather than providing it as an image. I don't see a reference to Primary_OH in the what you display, but I might be missing it. Somewhere in your code you call it and it should be in quotes is my guess...

Re: error: global name 'Primary_OH' is not defined

JoeBorgione — Fri, 27 Dec 2019 20:40:40 GMT

Looks like line 74 is your problem. You are making a selection on what python thinks is a variable (since it's not quoted) but I don't see any other reference to Primary_OH. Typically, you make a selection against a table view or a feature layer, and I don't see either of those as well.

Re: error: global name 'Primary_OH' is not defined

MichaelVolz — Fri, 27 Dec 2019 20:46:48 GMT

Can you put a print statement in at line 73 and see what the result is?

Re: error: global name 'Primary_OH' is not defined

RickHawkins — Mon, 30 Dec 2019 14:06:17 GMT

Michael,

i can put a print statement but what do you want me to have printed out? I think that the error is due to line 77 but not sure.

This is the error that i get

Re: error: global name 'Primary_OH' is not defined

MichaelVolz — Mon, 30 Dec 2019 14:11:57 GMT

In your original post it said Primary_OH is not defined and now it says Primary_UG is not defined.

The print statement before the SelectLayerByAttribute call is just a troubleshooting technique to see what value is being passed if any.

Re: error: global name 'Primary_OH' is not defined

Javier_AntonioEscudero — Sun, 12 Dec 2021 07:52:31 GMT

I realized there is a variable called my Map that is not really being used in your script.
Anyway, in the top of your script, try to define these variables as following:

from tkinter import *
from tkinter import messagebox
import Tkinter, arcpy

myMap = arcpy.mapping.MapDocument("C:/GISMAPS/LUS Map.mxd")
#myMap = arcpy.mapping.MapDocument("CURRENT")



# Referencing variables here -------------------------
Primary_OH_path = r"C:\<your_path>\<your_gdb.gdb>\Primary_OH" 
Primary_OH = arcpy.MakeFeatureLayer_management(Primary_OH_path, "Primary_OH")

Primary_UG_path = r"C:\<your_path>\<your_gdb.gdb>\Primary_UG"
Primary_UG = arcpy.MakeFeatureLayer_management(Primary_UG_path, "Primary_UG")

Re: error: global name 'Primary_OH' is not defined

JoeBorgione — Sun, 12 Dec 2021 07:52:34 GMT

Line 77 & 85 are going to give you problems every time:

# line 77:

arcpy.SelectLayerByAttribute_management(Primary_OH, "", Expression)‍‍‍

# line 85:

arcpy.SelectLayerByAttribute_management(Primary_UG, "", "[FEEDERID] = '2050'")
‍‍‍‍‍‍‍

Primary_OH and Primary_UG are never defined as variables in your script; when python reads a string that is not within quotes, it treats that string as a variable.

 if x == 0:
    print(x)
    
Traceback (most recent call last):

  File "<ipython-input-1-ea8c3abaaaf7>", line 1, in <module>
    if x == 0:

NameError: name 'x' is not defined


x = 1  # value of x is now defined

 if x == 0:
    print('x equals zero')
else:
    print('Nope; x does not equal zero...')
    
Nope; x does not equal zero...‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍  # the result of the print() function...‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: error: global name 'Primary_OH' is not defined

RickHawkins — Mon, 30 Dec 2019 15:31:16 GMT

Javier,

I know about ..mxd files but do not know about .gdb files. Is that what you are telling me to put in the Primary_OH_path. Where would the .gdb be located? I do not see one when i search C: drive

Re: error: global name 'Primary_OH' is not defined

RickHawkins — Mon, 30 Dec 2019 15:40:55 GMT

Joe,

I guess i will have to change the lines to some other command. What i am trying to do here is go to the properties of a layer and create a definition query (i.e. - [FEEDERID] = "2050") and turn off all of the feeders for that layer (Primary OH) that are not numbered 2050. Am i doing this wrong? Is there another way to do this?

Thanks

Re: error: global name 'Primary_OH' is not defined

Javier_AntonioEscudero — Mon, 30 Dec 2019 15:43:36 GMT

Hi Rick,

The gdb file (File Geodatabase) is the most popular container of data in ArcGIS. However, mxd files can contain multiples types of files and containers (Data sources).

In order to get the Primary_OH_Path of yout layer follow these steps:

Open your map document "C:/GISMAPS/LUS Map.mxd"
Clic on Primary_OH layer properties

Go to Source tab and explore data source properties of the layer

Re: error: global name 'Primary_OH' is not defined

RickHawkins — Mon, 30 Dec 2019 15:53:09 GMT

Javier,

When i do that i get the following:

There is no .gdb database.

Re: error: global name 'Primary_OH' is not defined

MichaelVolz — Mon, 30 Dec 2019 15:58:05 GMT

Rick:

You should copy the data to a file gdb from the personal geodatabase that you are currently using as ESRI is migrating to Pro which does not support personal geodatabases that you are using. File geodatabases can be used in both ArcMap (32-bit) and Pro (64-bit).

Re: error: global name 'Primary_OH' is not defined

RickHawkins — Mon, 30 Dec 2019 16:02:59 GMT

thanks everyone for you help. i will see what i need to do to copy the data to a .gdb file.

Will get back with you when this is completed.

Re: error: global name 'Primary_OH' is not defined

Javier_AntonioEscudero — Sun, 12 Dec 2021 07:52:36 GMT

OK. It does not matter. The container of data is a Personal Geodatabase, is so similar to File Geodatabase


# Primary OH Path
geodatabase = "C:\gismaps\LusData.mdb"
dataset = "ElectricData"
feature_class = "PriOHElectricLineSegment"
Primary_OH_path = r"{0}\{1}\{2}".format(geodatabase, dataset, feature_class) 
Primary_OH = arcpy.MakeFeatureLayer_management(Primary_OH_path, "Primary_OH")

Re: error: global name 'Primary_OH' is not defined

Javier_AntonioEscudero — Mon, 30 Dec 2019 16:08:30 GMT

You can try testing your script using personal geodatabase for now.

But, as Michael recommends, you should evaluate to migrate your data to File Geodatabase to better support.

Re: error: global name 'Primary_OH' is not defined

RickHawkins — Mon, 30 Dec 2019 16:16:12 GMT

Javier,

i entered the code that you suggested:

When running it i get the following errors:

Re: error: global name 'Primary_OH' is not defined

RickHawkins — Mon, 30 Dec 2019 16:17:38 GMT

i did put this code at the beginning

geodatabase = "C:\gismaps\LusData.mdb"
dataset = "ElectricData"
feature_class = "PriOHElectricLineSegment"

Re: error: global name 'Primary_OH' is not defined

Javier_AntonioEscudero — Mon, 30 Dec 2019 16:20:16 GMT

Rick

Try to set another name to the layer object, like "Primary_OH_Layer1", or something like that.

Primary_OH = arcpy.MakeFeatureLayer_management(Primary_OH_path, "Primary_OH_layer1")

Re: error: global name 'Primary_OH' is not defined

JoeBorgione — Sun, 12 Dec 2021 07:52:39 GMT

geodatabase = "C:\gismaps\LusData.mdb"
dataset = "ElectricData"
feature_class = "PriOHElectricLineSegment"

#####
geodatabase = r"C:\gismaps\LusData.mdb"‍‍‍‍‍‍

You need to be careful when setting variables that include a path. I like to use the r (raw text): it takes care of any of the escaped slashes for you.

You might also consider using arcpy.env.workspace; it can help clean up logical paths as well...