Bonjour, Je teste quelques scripts python créés à l'origine dans ArcGIS 10.3.1\/10.5.1 qui utilisent le module ArcHydroTools. J'ai installé le dernier package Arc Hydro dans ArcGIS Pro, mais il ne reconnaît toujours pas ce module. Je reçois l'erreur suivante lorsque j'essaie d'importer le module : " ModuleNotFoundError : Aucun module nommé 'ArcHydroTools' " Cette fonctionnalité n'est-elle pas encore disponible ? Ou devrais-je faire autre chose ? J'ai essayé de parcourir la documentation mais tout concerne ArcGIS desktop et non Pro. Du moins, je n'ai rien trouvé ! Merci d'avance, John

Could you provide an example of how to correctly call a archydro tool from a Python 3 script? For example, I'd like to call StreamDefinition from a script, would I import it as: from archydro . streamdefinition import StreamDefinition The only way I can see to then execute the tool is via params = ( "facPath" , "threshold" ) StreamDefinition . execute ( params , None ) I haven't been able to get that to work, is there another way?

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Appeler Arc Hydro Tools en Python dans ArcGIS Pro ?

JohnGaiot

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Bonjour,<\/P>

Je teste quelques scripts python créés à l'origine dans ArcGIS 10.3.1\/10.5.1 qui utilisent le module ArcHydroTools. J'ai installé le dernier package Arc Hydro dans ArcGIS Pro, mais il ne reconnaît toujours pas ce module. Je reçois l'erreur suivante lorsque j'essaie d'importer le module :<\/P>

<\/P>

" ModuleNotFoundError : Aucun module nommé 'ArcHydroTools' "<\/P>

<\/P>

Cette fonctionnalité n'est-elle pas encore disponible ? Ou devrais-je faire autre chose ?<\/P>

<\/P>

J'ai essayé de parcourir la documentation mais tout concerne ArcGIS desktop et non Pro. Du moins, je n'ai rien trouvé !<\/P>

<\/P>

Merci d'avance,<\/P>

<\/P>

John<\/P><\/BODY><\/HTML>

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ChristineDartiguenave

import archydro

oProcessor = archydro.streamdefinition.StreamDefinition()
oProcessor.bCallFromPYT = False
params = (flow_accum, int(stream_threshold),os.path.join(grid_location, "str"))
str_defres = oProcessor.execute(params, None)
if str_defres and str_defres[0] == apwrutils.C_OK:
str_def = str_defres[1]
else:
arcpy.AddError("Stream definition operation failed.")
return(apwrutils.C_NOTOK,)

TheodoreBarnhart

Could you provide an example of how to correctly call a archydro tool from a Python 3 script? For example, I'd like to call StreamDefinition from a script, would I import it as:

<SPAN class="keyword token">from</SPAN> archydro<SPAN class="punctuation token">.</SPAN>streamdefinition <SPAN class="keyword token">import</SPAN> StreamDefinition‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN></SPAN>

The only way I can see to then execute the tool is via

params <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="string token">"facPath"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"threshold"</SPAN><SPAN class="punctuation token">)</SPAN>
StreamDefinition<SPAN class="punctuation token">.</SPAN>execute<SPAN class="punctuation token">(</SPAN>params<SPAN class="punctuation token">,</SPAN> None<SPAN class="punctuation token">)</SPAN>‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

I haven't been able to get that to work, is there another way?

ChristineDartiguenave

We are still in the process of moving Arc Hydro Tools to Pro.

The best way to call the tools in pro is to use "import archydro" which is available with the most recent setups. You can try to type it in the Python window in Pro.

Another way is to import each script. The issue with this method is for tools that have the same name in the core product (e.g. flowdirection or flowaccumulation). You may end up importing the core tool instead of the arc hydro tools.

You can look in the tools to see how we are calling other tools (mainly calling the scripts for now) but eventually we will use import archydro.

As a side note, the core is working on a tracing network (hydro network) that will allow performing the hydro network analyses in Pro. it should be available early next year.

Christine

JohnGaiot

Here you go:

https://community.esri.com/thread/105831-arc-hydro-installation-versions-and-documentation

Yes you're right.. they are responsive when it comes to infrastructure, cartographic and online type applications. Their user base is large and some 'niche' users are left struggling, but we'll have to adapt one way or another eventually.

Cheers,

John

JohnGaiot

I tried manually typing in the import command in the Python window, which works with the standard modules. But when I try "import ArcHydroTools", I get the same "No module named.." error. Either the name of the module for calling Arc Hydro has changed or is nonexistent / not available for this version of the tools. We have automated much of our data processing with rather complicated scripts which would not be easily translatable to the Model Builder environment. Nor would I want to do that when I can just stick with ArcGIS Desktop..

V_StuartFoote

Hmm, do your ArcHydro snippets run run with Pro's integrated Python window? Using the Load Code context in the Python prompt...

The Python window—ArcPy Get Started | ArcGIS Desktop

That way you should be able to tell if it is incomplete environment, or a syntax error.

JohnGaiot

Hi Stuart,

It took me a while trying to find where Arc Hydro installs itself. The MSI installer does not tell you where it will install, and explorer does not search the "Program Files" folder for some weird 'security' reason (I tried typing "ArcHydro" as my search parameter from the C drive and only files I created referencing Arc Hydro or files I opened recently came up). So through manual sleuthing, I found Arc Hydro 'Pro' installs here:

C:\Program Files\ArcGIS\Pro\Resources\ArcToolBox\Scripts\ArcHydro (or likely it will install wherever you chose to install ArcGIS Pro)

I then proceeded to follow your suggestion, and it seems the AH install was smart enough to do that part for me. There was already a archydropython.pth file located in said "site-packages" folder with the path above already in it.

Let me clarify, the individual tools within the Arc_Hydro_Toolbox_Pro.tbx do run okay on their own. It's when I try calling the functions through ArcPy it bails with the following message (my script is called "2. Create EFD**" just in case you're wondering what that means):

Start Time<SPAN class="punctuation token">:</SPAN> March <SPAN class="number token">12</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">2018</SPAN> <SPAN class="number token">4</SPAN><SPAN class="punctuation token">:</SPAN><SPAN class="number token">18</SPAN><SPAN class="punctuation token">:</SPAN><SPAN class="number token">23</SPAN> <SPAN class="token constant">PM</SPAN>
Running script CreateEFD<SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN>
Failed script <SPAN class="number token">2</SPAN><SPAN class="punctuation token">.</SPAN> Create <SPAN class="token constant">EFD</SPAN><SPAN class="operator token">*</SPAN><SPAN class="operator token">*</SPAN> <SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN>
 Traceback <SPAN class="punctuation token">(</SPAN>most recent call last<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp; File <SPAN class="string token">"Z:\GI\ProvincialMapping\Tools\Python\MNRF_TerrainProcessing-JG-2017-08-09\TerrainScripts\Step C.2. Create EFD - master.py"</SPAN><SPAN class="punctuation token">,</SPAN> line <SPAN class="number token">38</SPAN><SPAN class="punctuation token">,</SPAN> in <SPAN class="markup token"><SPAN class="token tag"><SPAN class="token tag"><SPAN class="punctuation token"><</SPAN>module</SPAN><SPAN class="punctuation token">></SPAN></SPAN></SPAN>
&nbsp;&nbsp;&nbsp; import ArcHydroTools
ModuleNotFoundError<SPAN class="punctuation token">:</SPAN> No module named <SPAN class="string token">'ArcHydroTools'</SPAN>
 Failed to execute <SPAN class="punctuation token">(</SPAN>CreateEFD<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>
Failed at March <SPAN class="number token">12</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">2018</SPAN> <SPAN class="number token">4</SPAN><SPAN class="punctuation token">:</SPAN><SPAN class="number token">18</SPAN><SPAN class="punctuation token">:</SPAN><SPAN class="number token">24</SPAN> <SPAN class="token constant">PM</SPAN> <SPAN class="punctuation token">(</SPAN>Elapsed Time<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">0.59</SPAN> seconds<SPAN class="punctuation token">)</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

JohnGaiot

Thanks for this tip! I'll give it a try hopefully this afternoon and will report back if successful.

V_StuartFoote

Julio Novoa gave this good hint in this thread (Arc Hydro Setup Versions and Documentation ) regards needing a README.txt configuration note:

1. Extract the zip file to the location where you want to install ArcHydroPro
2. Edit the file archydropython.pth so that the path points to the location of ArcHydro\Scripts\ArcHydro (e.g. C:\Tools\ArcHydroPro\Scripts\ArcHydro).
3. Copy the edited archydropython.pth to %ProgramFiles%\ArcGIS\Pro\bin\Python\envs\arcgispro-py3\lib\site-packages.

Otherwise you won't be able to run ArcHydro from ArcGIS Pro. ArcHydro uses Python from the default conda environment arcgispro-py3.

JohnGaiot

Thanks for the tip for adding the toolbox, but I am still getting the same error. Either the python functionality isn't there yet or they changed how to access it.. which would be unfortunate, since many of the standard tools are accessed exactly the same way under both platforms (with a few notable exceptions - but they're usually well explained). The same should hold true for Arc Hydro.

V_StuartFoote

Insert the Arc_Hydro_Tools_Pro.tbx toolbox to the project Catalog for use, the resource path to the installion is Program Files -> ArcGIS -> Pro -> Resources -> ArcToolBox ->Toolboxes

Each tool/script in the toolbox has the Syntax of the script, but no Usage or Code samples--those have not really changed once the toolbox is added to the Project.

DanPatterson_Retired

You will have to wait until someone that uses the new version wades in since I think Arc Hydro is in a bit of a limbo at present

JohnGaiot

Yes I tried installing the latest version listed there and no luck. I couldn't find any documentation either on this site.. it's all old help files for ArcGIS.

DanPatterson_Retired

packages designed for arcmap would also have a separate install for ArcGIS Pro.

The location is here http://downloads.esri.com/archydro/ArcHydro/Setup/Pro/

I would hope that there are installation instructions for the version of PRO that you are using... I didn't investigate further

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