Programmatically get the data source from a lyr file pointing to an Esri GRID format raster uing Python 2.7 and ArcMap 10.5

MatthewHowe

I'm trying to get the data source from a bunch of lyr files pointing to various raster formats. Using the lyr.dataSource method on a feature layer after creating a layer object I can get the data source for TIFs fine but Esri GRID format rasters are seen as being directories. My goal is to re-path the lyr files to the same raster that has been copied to another location using the lyr.replaceDatasource method.

1. <SPAN class="keyword token">import</SPAN> arcpy lyr <SPAN class="operator token">=</SPAN> r”\\gis\test<SPAN class="punctuation token">.</SPAN>lyr”
   layer <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>mapping<SPAN class="punctuation token">.</SPAN>Layer<SPAN class="punctuation token">(</SPAN>lyr<SPAN class="punctuation token">)</SPAN>
   <SPAN class="keyword token">print</SPAN> layer<SPAN class="punctuation token">.</SPAN>dataSource
   
   Runtime error Traceback <SPAN class="punctuation token">(</SPAN>most recent call last<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
   File <SPAN class="string token">"<string>"</SPAN><SPAN class="punctuation token">,</SPAN> line <SPAN class="number token">1</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">in</SPAN> <SPAN class="operator token"><</SPAN>module<SPAN class="operator token">></SPAN>
   File <SPAN class="string token">"c:\program files (x86)\arcgis\desktop10.5\arcpy\arcpy\arcobjects\_base.py"</SPAN><SPAN class="punctuation token">,</SPAN> line <SPAN class="number token">78</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">in</SPAN> _get<SPAN class="punctuation token">(</SPAN>attr_name<SPAN class="punctuation token">,</SPAN> self<SPAN class="punctuation token">.</SPAN>__class__<SPAN class="punctuation token">.</SPAN>__name__<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
   NameError<SPAN class="punctuation token">:</SPAN> The attribute <SPAN class="string token">'dataSource'</SPAN> <SPAN class="keyword token">is</SPAN> <SPAN class="operator token">not</SPAN> supported on this instance of Layer<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>‍</SPAN><SPAN>‍</SPAN></SPAN>

Is there a clever way to get the full data source for the lyr file?

DanPatterson_Retired

keep digging

Layer properties—Help | ArcGIS Desktop 

layer (Read Only)

The Describe object of the layer within a .lyr file.