nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Python error 'No module named arcpy'

Anonymous User

Hey folks,

New to python but not coding; I'm running the Python tutorial, Python for everyone, and outright have an error I can't seem to find a solution to. Using Python 2.7.10 I tried running the sample script and immediately got the 'No module named arcpy' error.

My path variables appear correct:

PYTHONPATH: C:\Python27\ArcGIS10.3\Lib\site-packages

My Desktop 10.x pth file:

C:\Program Files (x86)\ArcGIS\Desktop10.3\bin
C:\Program Files (x86)\ArcGIS\Desktop10.3\arcPy
C:\Program Files (x86)\ArcGIS\Desktop10.3\ArcToolBox\Scripts

I'm running Win 0S 7 Pro SP1 64-bit

The example script:

import arcpy  # script fails here
#set workspace
arcpy.env.workspace = r"C:\Student\PythEveryone10_1\RunningScripts\Oregon_Polk.gdb"

#set up a describe object for each fc in gdb
fcList = arcpy.ListFeatureClasses()
for fc in fcList:
    desc = arcpy.Describe(fc)
    print desc.spatialReference.name

print "Script completed"

Looking for any suggestions for troubleshooting. Thanks!

(Curtis Price added formatting and put the import arcpy that is failing at the top)

Find more posts tagged with

Accepted answers

DanPatterson_Retired

just added an addendum...check my previous post so you can check your installation

All comments

Anonymous User

Thanks all; coincidentally, Dan as you had sent me the info regarding ensuring Pythonwin was within the correct folder path it turns out I had a separate install of Python on this machine and was reading that path for installation for Pythonwin install. I ended up uninstalling everything and reinstalling and ensuring my paths and environments were correct.

Happy to say I'm now in code heaven. Although I was a bit confused at first why ESRI didn't include Pythonwin with the ArcMap installation. But further reading shows their thought process on this.

So thanks again all. I'm sure I'll have more Python related questions as I delve more.

curtvprice

if PYTHONPATH env variable (not required to run Python) Is not set you will get a KeyError (os.environ is a dict of all os env variables). On my Mac this works:

print("HOME: " + os.environ["HOME"])

DanPatterson_Retired

ahh... so that explains why

print("PYTHONPATH: " + os.environ["PYTHONPATH"])

fails miserably on python 2.7.x on an iPad (Pythonista distribution) ... assuming that there is no equivalent for whatever iThingys run. At least sys.path is informative ... sort of ...

curtvprice

There are so many ways to launch Python, and often many versions of Python installed, that this can get tricky. Use these Python commands to verify your environment:

import sys
import os
print (sys.executable)
print(sys.prefix)
print("PYTHONPATH: " + os.environ["PYTHONPATH"])
print("sys.path:")
print("\n".join(sys.path))
import arcpy

The results from these print statements will give you more confidence that the right environment is set up to import arcpy.

My guess is your PYTHONPATH is not getting into the sys.path for some reason.

The Windows env variable PYTHONPATH must be set before the shell that launches Python (or a parent process like ArcMap) is launched for the PYTHONPATH to be read. This may mean you need to log out and log in again.

For best results instead of running the Python you installed to your Downloads folder (C:\Users\twhitley\Downloads\Python27\ -- not a great place to install software!) you should just uninstall that and use Esri's. Then you know all the python libraries will be compatible with ArcGIS and arcpy.

The command will below will launch the Python installed with ArcMap. If you are using PythonWin you should consider installing it there instead on another Python somewhere else on your computer.

C:\Python27\Desktop10.3\python.exe

Anonymous User

Thanks Dan, I'll work this through pythonwin and see what I can work out; much appreciated.

DanPatterson_Retired

If you run scripts within the python IDE inside of arcmap, then there is (apparently) no need to import arcpy. I would not make this a habit. I personally, use external IDEs such as PyScripter and PythonWin for all my scripting even when I have arcmap open. Just a habit... because I often run different versions of python (ie 2.7.x and 3.4.x or 3.x.x etc) and I like different IDEs for different purposes and different reasons.

pythonwin should be installed in the c:\python27 folder. This is the executable from which I create a desktop shortcut. Check to see if you indeed have a pythonwin folder inside of correct folder

C:\Python27\ArcGIS10.3\Lib\site-packages\pythonwin\Pythonwin.exe

Anonymous User

Dan/Matthew

Thank you for the response but I should note that the original script does include import arcpy and was missed in my poor copy/paste. Opening the script with 2.710 shell results in the error "No module named arcpy". Coincidentally, I downloaded pythonwin and tried to run the same script and of course because of different enviro variables it resulted in similar errors:

Traceback (most recent call last):

File "C:\Users\twhitley\Downloads\Python27\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py", line 326, in RunScript

exec codeObject in __main__.__dict__

File "C:\Student\PythEveryone10_1\RunningScripts\SpatialRef.py", line 2, in <module>

import arcpy

ImportError: No module named arcpy

MatthewBaber

import arcpy from arcpy import env

env.workspace = r"C:\Student\PythEveryone10_1\RunningScripts\Oregon_Polk.gdb"

DanPatterson_Retired

import arcpy # add as first line .... then you can use arcpy

Join the Conversation

Signed in members can post, follow updates, and more. New here? Register a free account.

Quick Links

Community Help
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.