Listing layers from .mxd file using ArcPy for ArcGIS Pro?

Question

I am looking for a way to access a .mxd file's layer names and data sources.

In ArcGIS Desktop, I could do:

def print_layer_info(mxd_path):
    print(mxd_path + ":")
    mxd = arcpy.mapping.MapDocument(mxd_path)

    for df in arcpy.mapping.ListDataFrames(mxd, "*"):
        lyr = arcpy.mapping.ListLayers(mxd, "", df)[0]
        if lyr.supports("dataSource"):
            print "\t" + lyr.name
            print "\t\t" + lyr.dataSource
    del mxd

According to http://pro.arcgis.com/en/pro-app/arcpy/mapping/migratingfrom10xarcpymapping.htm, I could do:

p = arcpy.mp.ArcGISProject("file.mxd")

But that doesn't work. When I do that I get a OSError.

Since the arcpy.mapping.MapDocument is gone in ArcPy for ArcGIS Pro, what is the equivalent way of reading layer name and datasource of an .mxd file?

Answer 1

You can list the layers and the datasources of an MXD (ArcMap document) from ArcGIS Pro by simply importing the MXD into a project, and then following the same workflow you would do from ArcMap. (The syntax may vary a little).

• Load up a project (like current, as the following code is run from the Python window)
• Load the MXD into it
• Find the map
• List the layers

code:

p = arcpy.mp.ArcGISProject("CURRENT")
p.importDocument(r"C:\data\data.mxd")
for m in p.listMaps(): print(m.name)
> Layers
mxd = p.listMaps("Layers")[0]
for l in mxd.listLayers():
    if l.supports("dataSource"):
        print("{}, {}".format(l.name, l.dataSource))
> World Ocean Reference, 
> foo1, source1
> foo2, source2
> World Ocean Base, 

Answer 2

It is not possible to use the arcpy.mp module that comes with ArcGIS Pro to create a MapDocument object from an *.mxd.

To do that you use arcpy.mapping from the arcpy site-package that comes with the ArcGIS Desktop 10.x architecture and works against the ArcMap application.

To work with the content of an *.mxd in ArcGIS Pro (or the arcpy which it installs) you would first need to import the *.mxd into an ArcGIS Pro project (and then create ArcGISProject and Map objects from that).