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How to get a layer object from input parameter by arcpy?

FengchaoGu1

Hello, I am wondering how I can get the layer object from a shapefile. In ArcMap, it is pretty easy. I can use:

route_temp = arcpy.GetParameterAsText(0)

route_temp_lyr = arcpy.mapping.Layer(route_temp)
working_f = os.path.split(route_temp_lyr.dataSource)[0]

But how I can do it in ArcGIS Pro? I want to get the layer object from my input parameter.

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Accepted answers

JoshuaBixby

Why not use GetParameter <SPAN class=""></SPAN>instead of<SPAN class=""> </SPAN>GetParameterAsText, using the former passes you a reference to the layer object so you don't have to create another reference.

All comments

FengchaoGu1

Yes, it is a specific layer in a specific map in an open ArcGIS Pro session. I just drag it from table of content as an input.

The scripts is as blow.

<SPAN class="comment token"># ---------------------------------------------------------------------------</SPAN>
<SPAN class="comment token"># NAV Combined tool</SPAN>
<SPAN class="comment token"># Version 1.1</SPAN>
<SPAN class="comment token"># ---------------------------------------------------------------------------</SPAN>

<SPAN class="keyword token">import</SPAN> arcpy
<SPAN class="keyword token">from</SPAN> arcpy <SPAN class="keyword token">import</SPAN> env
<SPAN class="keyword token">import</SPAN> os
<SPAN class="keyword token">import</SPAN> PopUp
<SPAN class="keyword token">from</SPAN> subprocess <SPAN class="keyword token">import</SPAN> Popen

<SPAN class="comment token"># Users input</SPAN>
route_temp <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameterAsText<SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="comment token"># Testcode_route_temp</SPAN>

arcpy<SPAN class="punctuation token">.</SPAN>env<SPAN class="punctuation token">.</SPAN>overwriteOutput <SPAN class="operator token">=</SPAN> <SPAN class="token boolean">True</SPAN>
aprx <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>mp<SPAN class="punctuation token">.</SPAN>ArcGISProject <SPAN class="punctuation token">(</SPAN><SPAN class="string token">"CURRENT"</SPAN><SPAN class="punctuation token">)</SPAN>
aprxMap <SPAN class="operator token">=</SPAN> aprx<SPAN class="punctuation token">.</SPAN>listMaps<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Map"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>

<SPAN class="comment token"># Define variables</SPAN>
route_temp_display <SPAN class="operator token">=</SPAN> <SPAN class="string token">"route_temp_display.lyrx"</SPAN>
arcpy<SPAN class="punctuation token">.</SPAN>MakeFeatureLayer_management<SPAN class="punctuation token">(</SPAN>route_temp<SPAN class="punctuation token">,</SPAN><SPAN class="string token">"route_temp_lyr"</SPAN><SPAN class="punctuation token">)</SPAN>
arcpy<SPAN class="punctuation token">.</SPAN>SaveToLayerFile_management<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"route_temp_lyr"</SPAN><SPAN class="punctuation token">,</SPAN> route_temp_display<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"ABSOLUTE"</SPAN><SPAN class="punctuation token">)</SPAN>
route_temp_lyr <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>mp<SPAN class="punctuation token">.</SPAN>LayerFile<SPAN class="punctuation token">(</SPAN>route_temp_display<SPAN class="punctuation token">)</SPAN>
working_f <SPAN class="operator token">=</SPAN> os<SPAN class="punctuation token">.</SPAN>path<SPAN class="punctuation token">.</SPAN>split<SPAN class="punctuation token">(</SPAN>route_temp_lyr<SPAN class="punctuation token">.</SPAN>dataSource<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>
arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN>working_f<SPAN class="punctuation token">)</SPAN>
test_f <SPAN class="operator token">=</SPAN> os<SPAN class="punctuation token">.</SPAN>path<SPAN class="punctuation token">.</SPAN>split<SPAN class="punctuation token">(</SPAN>working_f<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>
testcode <SPAN class="operator token">=</SPAN> os<SPAN class="punctuation token">.</SPAN>path<SPAN class="punctuation token">.</SPAN>split<SPAN class="punctuation token">(</SPAN>test_f<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN>
codeshort <SPAN class="operator token">=</SPAN> testcode<SPAN class="punctuation token">.</SPAN>split<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"_"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">"_"</SPAN> <SPAN class="operator token">+</SPAN> testcode<SPAN class="punctuation token">.</SPAN>split<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"_"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN>
rt_shp <SPAN class="operator token">=</SPAN> working_f <SPAN class="operator token">+</SPAN> <SPAN class="string token">'\\'</SPAN> <SPAN class="operator token">+</SPAN> testcode <SPAN class="operator token">+</SPAN> <SPAN class="string token">'_route_temp.shp'</SPAN>
cl_f <SPAN class="operator token">=</SPAN> test_f <SPAN class="operator token">+</SPAN> r<SPAN class="string token">'\NAV\Clusters'</SPAN>
dr_f <SPAN class="operator token">=</SPAN> test_f <SPAN class="operator token">+</SPAN> r<SPAN class="string token">'\NAV\Drive_route'</SPAN>
streets <SPAN class="operator token">=</SPAN> working_f <SPAN class="operator token">+</SPAN> <SPAN class="string token">'\\'</SPAN> <SPAN class="operator token">+</SPAN> testcode <SPAN class="operator token">+</SPAN> <SPAN class="string token">'_Streets_NAV.shp'</SPAN>
fc5clusters <SPAN class="operator token">=</SPAN> working_f <SPAN class="operator token">+</SPAN> <SPAN class="string token">'\\'</SPAN> <SPAN class="operator token">+</SPAN> testcode <SPAN class="operator token">+</SPAN> <SPAN class="string token">'_FC5Clusters.shp'</SPAN>
stragglers <SPAN class="operator token">=</SPAN> working_f <SPAN class="operator token">+</SPAN> <SPAN class="string token">'\\'</SPAN> <SPAN class="operator token">+</SPAN> testcode <SPAN class="operator token">+</SPAN> <SPAN class="string token">'_stragglers.shp'</SPAN>
driveroute <SPAN class="operator token">=</SPAN> dr_f <SPAN class="operator token">+</SPAN> <SPAN class="string token">'\\'</SPAN> <SPAN class="operator token">+</SPAN> testcode <SPAN class="operator token">+</SPAN> <SPAN class="string token">'_driveroute.shp'</SPAN>
driveroute_display <SPAN class="operator token">=</SPAN> dr_f <SPAN class="operator token">+</SPAN> <SPAN class="string token">'\\'</SPAN> <SPAN class="operator token">+</SPAN> testcode <SPAN class="operator token">+</SPAN> <SPAN class="string token">'_driveroute.lyr'</SPAN>
zlevels <SPAN class="operator token">=</SPAN>&nbsp; working_f <SPAN class="operator token">+</SPAN> r<SPAN class="string token">'\Working.gdb\Zlevel_fd'</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">'\\'</SPAN> <SPAN class="operator token">+</SPAN> testcode <SPAN class="operator token">+</SPAN> <SPAN class="string token">'_Auto_Zlevels'</SPAN>
zlevels_rj <SPAN class="operator token">=</SPAN> working_f <SPAN class="operator token">+</SPAN> <SPAN class="string token">'\\'</SPAN> <SPAN class="operator token">+</SPAN> testcode <SPAN class="operator token">+</SPAN> <SPAN class="string token">'_Zlevels_route_join.shp'</SPAN>
mob <SPAN class="operator token">=</SPAN> working_f <SPAN class="operator token">+</SPAN> <SPAN class="string token">'\\'</SPAN> <SPAN class="operator token">+</SPAN> testcode <SPAN class="operator token">+</SPAN> <SPAN class="string token">'_mob.shp'</SPAN>
steets_df <SPAN class="operator token">=</SPAN> test_f <SPAN class="operator token">+</SPAN> r<SPAN class="string token">'\DATA'</SPAN><SPAN class="operator token">+</SPAN> <SPAN class="string token">'\\'</SPAN> <SPAN class="operator token">+</SPAN> testcode <SPAN class="operator token">+</SPAN> <SPAN class="string token">'_Streets.shp'</SPAN>
navb <SPAN class="operator token">=</SPAN> dr_f <SPAN class="operator token">+</SPAN> <SPAN class="string token">'\\'</SPAN> <SPAN class="operator token">+</SPAN> testcode <SPAN class="operator token">+</SPAN> <SPAN class="string token">'_NAVBuffer.shp'</SPAN>
scrap_gdb <SPAN class="operator token">=</SPAN> test_f <SPAN class="operator token">+</SPAN> r<SPAN class="string token">'\DATA\scrap.gdb'</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>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

And what I want is to get the data source of this input layer? I did not figure it out how to get it.

JoshuaBixby

What does the input represent that is getting passed? A specific layer in a specific map in an open ArcGIS Pro session?

FengchaoGu1

Thanks! But the question is there is no specific function about it in arcpy.mp. In the picture is the list of the functions but it seems that there is no corresponding function to get it.

In ArcMap, the logic is very clear. First get the parameters, and then arcpy.mapping.Layer to get the layer, then I can use the function lyr.dataSource to get the data source of this layer.

However, I did not figure it out the steps about it with arcpy.mp. In short, how I can use arcpy.mp to get the layer of an input, where the input is string format from the result of arcpy.GetParameterAsText function?

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AfrikaansAlbanianAmharicArabicArmenianAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanCebuanoChichewaChinese (Simplified)Chinese (Traditional)CorsicanCroatianCzechDanishDutchEnglishEsperantoEstonianFilipinoFinnishFrenchFrisianGalicianGeorgianGermanGreekGujaratiHaitian CreoleHausaHawaiianHebrewHindiHmongHungarianIcelandicIgboIndonesianIrishItalianJapaneseJavaneseKannadaKazakhKhmerKoreanKurdishKyrgyzLaoLatinLatvianLithuanianLuxembourgishMacedonianMalagasyMalayMalayalamMalteseMaoriMarathiMongolianMyanmar (Burmese)NepaliNorwegianPashtoPersianPolishPortuguesePunjabiRomanianRussianSamoanScots GaelicSerbianSesothoShonaSindhiSinhalaSlovakSlovenianSomaliSpanishSundaneseSwahiliSwedishTajikTamilTeluguThaiTurkishUkrainianUrduUzbekVietnameseWelshXhosaYiddishYorubaZulu

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DanPatterson_Retired

'mapping' is now 'mp' in Pro

Guidelines for arcpy.mp—ArcPy | ArcGIS Desktop

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