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Table of Contents

The challenge here is getting the ESRI-provided version of Python and associated module s to work with non-ESRI provided modules that you gain via Anaconda. Generally speaking, when you download and install Anaconda, you will get newer versions of Python-related material (including standard modules like numpy) than what is in your ArcGIS "Python Stack," which will not work. You therefore must configure Anaconda to be compatible with the version of ArcGIS "Python stack" (10.1, 10.2, 10.3, Pro) that you have installed.  The instructions here describe how to install older versions of modules into Anaconda that will work with ArcGIS. 



Related topic: Calling arcpy from an external virtual Python environment


What is the Anaconda distribution?

Anaconda is an open-source Python distribution that makes is possible to easily install and manage many pre-packaged third party Python modules. It is a competing alternative to the Enthought Python Distribution (EPD).

It has some big advantages over using Esri's distributionsthe Python Esri provides with ArcGIS:

  • Very useful add-ons tools not in Esri's standard distribution are available (iPythonIPython, pandasJupyter notebook, etcSpyder).
  • You can install and update the Python stack as a regular (non-pr) user
  • You can install and remove, and update third party packages easily (and without admin access)A single Python install stack can be used to set up different "virtual environments" (including "ArcGIS-standard" ones, with Anaconda checking for compatibility for you 
  • Manage multiple environments (for example, one compatible with ArcMap, another compatible with ArcGIS Pro)


The general workflow to make this happen is to:

  • Install Anaconda without fouling the Windows environment (paths, registry) to break Esri's python stack
  • Configure Anaconda with the particular add-ons you want, and
  • Configure ArcGIS's Python so that it is aware of the appropriate Anaconda content.Anaconda environment (so you can import modules not in Esri's stack)

1) Download and Install Anaconda


The main Anaconda distribution is pretty large (> 3 GB). MiniConda is a smaller version that just includes the Python standard library to start.

You can download and install either one, depending on whether you want to spend the time and disk space. Miniconda most efficient, as you can always download down anything in the conda distibution you want later.

Run the .exe installers

Select install for a single


user (Not "All Users")

  1. Install to a folder where there is going to be plenty of space (recommend the D drive, not the C drive)
  2. IMPORTANT: To avoid breaking ArcGIS, uncheck the checkboxes  (a) make Anaconda the default Python and (b) add Anaconda's Python to the PATH. 
  3. Here are screenshots to help guide you through the install process.
  4. Windows 10: after installing, rename the shortcut Anaconda Prompt to "Anaconda Prompt 32-bit" or "64-bit"

Anaconda first run

Open the Anaconda prompt window (Search in Windows and start the shortcut "Anaconda Prompt") and enter "python" in the command window:

Code Block
titleFirst Anaconda Session
(D:\Users\jwpowell\Miniconda2) C:\Users\jwpowell>python
Python 2.7.13 |Continuum Analytics, Inc.| (default, May 11 2017, 14:07:41) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
Anaconda is brought to you by Continuum Analytics.
Please check out: and

At this point, you will have full Anaconda version of the python environment  have a nice Anaconda Python setup (~ 225 MB) that's spiffy and new and totally useless with ArcMap.

2) Set up an SSL certificate for Conda

The Department of Interior is now requiring SSL encryption. This means you cannot download Anaconda packages without an SSL certificate in place.


  1. Download the DOI certificate:  


  1.  to your Downloads folder (details on SSL setup)
  2. Open "Anaconda Prompt" window
  3. Set up the certificate to use it with Conda
Code Block
titleWindows Command Prompt
mkdir %USERPROFILE%\.certificates
copy %USERPROFILE%\Downloads\DOIRootCA2.cer %USERPROFILE%\.certificates
conda config --set ssl_verify %USERPROFILE%\.certificates\DOIRootCA2.cer

Set up SSL certificate for PIP (optional)

If you plan to use the pip utility to download and install packages not included in the Conda distribution, set up a certificate for pip:

Code Block
titleWindows Command Prompt
mkdir %APPDATA%\pip
(echo [global] & echo cert=%USERPROFILE%\.certificates\DOIRootCA2.cer) > %APPDATA%\pip\pip.ini

3) Configure Anaconda To Work with ArcGIS

The following workflow will demonstrate how set up an Anaconda virtual environment similar to ArcGIS, with the "pandas" module added. Pandas is great for a whole variety of data processing tasks (just google "python pandas"). If you get this far, you can adapt this workflow to include other modules you may wanta custom Python environment within Anaconda that has the same modules installed as ArcGIS Python, and then add a compatible version of Spyder and Jupyter.

The following example is for ArcGIS, assuming you have successfully installed MiniConda 2 32-bit (as above).

A. Find the versions of numpy and matplotlib


Open ArcMap and its Python window, and enter these commands:


for your version of ArcGIS Desktop

The critical modules for ArcGIS compatibility can be determined from your Desktop or Pro Python command line.

(Or you can just look at the list below under B.)

Code Block
titlePython script for ArcGIS Python window
# - report ArcGIS Python modue versions
# Example output:
# C:\ArcGIS\Pro\bin\ArcGISPro.exe
# Python 3.5.2 |Continuum Analytics, Inc.| (default, Jul  5 2016, 11:41:13) [MSC v.




64 bit (




# matplotlib 1.5.3
# numpy 1.11.2
# scipy 0.18.1
import sys
import os
ff = "{} {}"
    print(ff.format("Python", sys.version))
    import matplotlib
    print(ff.format("matplotlib", matplotlib.__version__))
    import numpy
    print(ff.format("numpy", numpy.__version__))
    import scipy
    print(ff.format("scipy", scipy.__version__))

B. Create an Anaconda


Rather than modifying the basic Anaconda installation, you can create a custom environment within Anaconda and specify the version of Pandas you want there. To do this:


environment for use with ArcGIS

We'll also include a few other modules that we know are shipped in the ArcGIS Python stack.

  1. Open the Anaconda prompt (32 or 64, depending on the ArcGIS environment you are integrating with)
  2. Create a compatible environment
    1. 32-bit 2.7 (ArcMap, ArcCatalog)
      ArcGIS 10.2.2:  conda create -n arc1022 python=2.7.5 numpy=1.7.1 matplotlib=1.3.0 pyparsing xlrd xlwt console_shortcut
      ArcGIS 10.3.1:  conda create -n arc1031 python=2.7.8 numpy=1.7.1 matplotlib=1.3.0 pyparsing xlrd xlwt console_shortcut
      ArcGIS 10.4.1: conda create -n arc1041 python=2.7.10 numpy=1.9.2 matplotlib=1.4.3 scipy=0.16.0 pandas pyparsing xlrd xlwt  console_shortcut *NOTE* Esri shipped 0.15.0, but I needed to use 0.16.0 to have conda work
      ArcGIS 10.5: conda create -n arc105 python=2.7.12 numpy=1.9.2 matplotlib=1.4.3  scipy=0.17.0 pandas pyparsing xlrd xlwt console_shortcut
      ArcGIS 10.5.1: conda create -n arc1051 python=2.7.13 numpy=1.9.3 matplotlib=1.5.2  scipy=0.17.0 pandas pyparsing xlrd xlwt console_shortcut
      ArcGIS 10.6.1: conda create -n arc1061 python=
    1.5 pandas" 
    or, better yet, use this file (conda_arc1022.txt) that has a more complete list
    "conda create --file conda_arc1022.txt" Anaconda's conda command will then
    1. 2.7.14 numpy=1.9.3 matplotlib=1.5.2  scipy=0.17.0 pandas pyparsing xlrd xlwt console_shortcut
    2. 64-bit 2.7 ArcGIS Desktop Background Geoprocessing
      Same as above for each version, from Anaconda 64-bit prompt, for example:
          conda create -n arc105x64 python=2.7.12 numpy=1.9.2 matplotlib=1.4.3  scipy=0.17.0 pandas pyparsing xlrd xlwt console_shortcut
    3. 64-bit Python 3 ArcGIS Pro (from Anaconda 64 bit prompt).
      ArcGIS Pro 1.2: conda create -n arcpro12 python=3.4.3 numpy=1.9.3 matplotlib=1.4.3 scipy=0.16.0 pandas pyparsing xlrd xlwt console_shortcut
      ArcGIS Pro 1.3: conda create -n arcpro13 python=3.4.4 numpy=1.10 matplotlib=1.4.3 scipy=0.16.1 pandas pyparsing xlrd xlwt console_shortcut
      ArcGIS Pro 2.0: conda create -n arcpro20 python=3.5.2 numpy=1.11.2 matplotlib=1.5.3 scipy=0.18.1 pandas pyparsing xlrd xlwt console_shortcut
      ArcGIS Pro 2.2.1: conda create -n arcpro22 python=3.6.5 numpy=1.14.2 matplotlib=2.2.2 scipy=1.0.1 pandas pyparsing xlrd xlwt console_shortcut
  3. The conda tool will:
    • Determine that the specified package versions are compatible with each other.
    • Find any packages on which these depend and determine most recent
  • compatible versions of packages not completely specified Prompts
    • versions that are compatible with what you've asked for, if not completely specified.
    • Show you what it plans to do and prompts you to continue.
  • Downloads
    • Download (only) the
  • pieces
    • packages you need to "overlay"
  • with
    • onto the base environment to get the environment you have specified.
    • Set up a environment subdirectory, (D:\Users\jwpowell\Miniconda2\envs\arc1041 in
  • the Anaconda install folder "arc1022" and downloads these
    • our example) installing the downloaded packages into it. This adds up to about 1.5 GB in our ArcGIS 10.4.1 example.
    • The console_shortcut conda package will adds a shortcut to your Windows start menu that directly starts up your environment. (Note, if you remove the environment, you will have to delete it yourself.)
    • Windows 10 note: 

      Windows 10 won’t show a start menu item if the name of an item/shortcut within the new group matches a shortcut name in another group and has the same target  (e.g. both ‘Anaconda2 (32-bit)’ and ‘Anaconda2 (64-bit)’ have a shortcut named ‘Anaconda Prompt’ with a target of cmd.exe which confuses Windows 10). So, when Miniconda2 32-bit (and/or 64-bit) is installed edit the ‘Properties’ of ‘Anaconda Prompt’ -> General tab -> rename to ‘Anaconda Prompt 32-bit’. Also, rename each shortcut that is created for environments for 32-bit or 64-bit similarly for consistency. For example, if you created a new virtual environment in Anaconda 32-bit named arc1041 then you would rename the shortcut from ‘Anaconda Prompt (arc1041)’ to ‘Anaconda Prompt 32-bit (arc1041).

C. Test the virtual environment

Open an Anaconda command window and load the virtual environment.


Code Block
titleAnaconda command prompt
C:\Users\jwpowell> conda info --envs
# conda environments:
arc1041                  D:\Users\


root                  *  D:\Users\jwpowell\Miniconda2
D:\Users\jwpowell>activate arc1041
Activating environment "




[arc1022] D:\Users\


jwpowell> conda list


# packages in environment at D:\Users\










dateutil                  2.4.1                    py27_0


matplotlib                1.3.0


numpy                     1.7.1                    py27_3


[arc1022] D:\Users\cprice>python
Python 2.7.5 |Continuum Analytics, Inc.| (default, Jul 1 2013, 12:41:55) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

3) Configure the conda environment to access ArcGIS

Copy the .pth file to your Anaconda environments site-packages folder so Anaconda can "see" arcpy

[arc1022] D:\Users\cprice> copy c:\Python27\ArcGIS10.2\lib\site-packages\desktop10.2.pth ^
[arc1022] D:\Users\cprice>python
Python 2.7.5 |Continuum Analytics, Inc.| (default, Jul 1 2013, 12:41:55) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import arcpy
>>> import pandas

4) Configure ArcGIS to find conda packages

  1. If you have admin access:

    1. Navigate to "C:\Python27\ArcGIS10.2\Lib\site-packages"

  2. If you don't
    1. Run this command: C:\Python27\ArcGIS10.2\python.exe -m site --user-site
    2. Navigate to the reported path (you may have to create the folder)
  3. Create and edit an ASCII file called "conda.pth" This file will have a single line, containing the path to the environment site-packages folder:
    For example: D:\users\cprice\Anaconda\envs\arc1022\lib\site-packages
  4. You should now be able to import pandas (and any other third-party packages you have loaded to Anaconda) from the ArcMap command prompt and it will also be available to script tools.

Testing and Troubleshooting

  1. Start ArcMap
  2. type "import pandas"
  3. type "pandas."
    1. A popup menu with a list of pandas-provided functions is a pretty good sign the install succeeded.

If you get an error message when you try to import, the most common cause I've seen is that the version of the module is still too new. In the pandas example, version 0.10.1 also appears to use the same 1.6.1 version of numpy but for some mysterious ESRI-specific reason that we could not get support to solve or really talk about, pandas 0.10.1 does not work. The solution was to modify the Anaconda "esri" environment to hold 0.10.0 pandas and all worked. To do change this: 

  1. Get to the Anaconda Command Prompt (via the Start menu on Windows, e.g.)
  2. Type "conda install -n esri pandas=0.10.0"




D. Add more packages

You can add more packages using conda install, but make sure you specify version numbers for these that won't change the Python modules required to stay compatible with ArcGIS's Python stack.

Let's add the Jupyter notebook and the Spyder IDE which are both popular additions to your toolbox.

Specifying the list of module versions (ARCLIST)  here ensures the environment will still work with ArcGIS 10.4.1.

Code Block
titleAnaconda command prompt
set ARCLIST=python=2.7.10 numpy=1.9.2 matplotlib=1.4.3 scipy=0.16.0 pandas pyparsing xlrd xlwt
conda install -n arc1041 %ARCLIST% jupyter spyder
The following NEW packages will be INSTALLED:

Pinning dependencies

Conda does provide a method for pinning dependencies to an environment so you don't have to specify them each time (as: ARCLIST above). You need to list these packages in a filed called pinned in the conda-meta folder. 

Code Block
titleAnaconda command prompt
C:\Users\jwpowell> activate arc1041
(arc1041) C:\Users\jwpowell>(echo python ==2.7.10 & echo numpy ==1.9.2 & echo matplotlib ==1.4.3 & echo scipy ==0.16.0) > %CONDA_PREFIX%\conda-meta\pinned
(arc1041) C:\Users\jwpowell>type %CONDA_PREFIX%\conda-meta\pinned
python ==2.7.10
numpy ==1.9.2
matplotlib ==1.4.3
scipy ==0.16.0


Now that this has been set up, conda install -n arc1041 scipy-0.18.1 will generate an error, and conda install six will update six to the highest version compatible with the pinned modules.

Finding more packages

You can search for more packages available in conda with conda search. There's a nice list on the Anaconda website that describes them all.

You're not limited to adding only packages to which conda has access to your new environment. Here's an example on how to install a commonly desired GIS-related package (shapely) into a conda virtual environment using the python pip utility:

4) Configure ArcGIS python to see Anaconda environment and vice versa

This can most easily be done (personal opinion) with a Python startup script

  • Install Anaconda, setup environment to match your ArcGIS version
  • Download (and rename from .py.txt to .py) this script:  ( -- and edit it to match your setup:
Code Block
titleEdit block in usercustomize.txt
# Edit here match your setup
# These paths must match your Anaconda setup exactly.

# Anaconda home folders
conda_arcmap_home = r"D:\Users\jwpowell\Miniconda2"
conda_arcmap64_home =  r"D:\Users\jwpowell\Miniconda3x64"
conda_arcpro_home = r"D:\Users\jwpowell\Miniconda3x64"

# anaconda environments set up to match Desktop and Pro
conda_arcmap_env = "arc1041"
conda_arcmap64_env = "arc1041x64"
conda_arcpro_env = "arcpro13"

# ArcGIS Pro install folder
default_pro_path = r"C:\ArcGIS\Pro"
# change to false after testing done
debug = True

# do not edit below this line
  • IMPORTANT - Test and debug this script by running it from python.exe for each of your environments. (See examples in the script header.)

Create a user-specific site packages folder and place the script in the folder with the name 
The user site-packages folder path can be found with:  python -m site --user-site
Usually:  C:\Users\username\AppData\Roaming\Python\Python27\site-packages (ArcGIS Desktop)
       C:\Users\username\AppData\Roaming\Python\Python34\site-packages (ArcGIS Pro, Python35 for Pro 2.0)

Code Block
titleCommand prompt
:: Python 2.7
mkdir %APPDATA%\Python\Python27\site-packages
copy %APPDATA%\Python\Python27\site-packages
:: Python 3.4
mkdir %APPDATA%\Python\Python34\site-packages
copy %APPDATA%\Python\Python34\site-packages



Testing and Troubleshooting


  1. StartDesktop or Pro, open the Python window
  2. print ("\n".join(sys.path))  -- you should see the Anaconda site-packages near the end of the list


  1. Start Anaconda 32-bit or 64-bit  command prompt
  2. activate arc1041  (or whichever environment in the list)
  3. python
  4. import arcpy
  5. print ("\n".join(sys.path)) -- you should see the ArcGIS site-packages near the end of the list


How to do a separate Python installation with ArcGIS? (GIS Stack Exchange)

Using ArcPy with Anaconda (PyMorton)


Many thanks to Parker Norton for his reviews and excellent additions to this document!

Other approaches

Justin Mayers has posted a batch script to install and set up set up MiniConda and environments to interact compatibly with Esri desktop software (ArcMap and Pro).

USGS BWTST supports an Anaconda3 SCCM package. This could be installed and linked to Pro using the information in this document.

ArcGIS Pro 2.x and later sets up an Anaconda install of its own. This environment could also be leveraged in various ways as time goes on.