Conventions

   import arcpy
   fc = "c:/ArcpyBook/data/TravisCounty/TravisCounty.shp"
   # Fetch each feature from the cursor and examine the extent # properties and spatial reference
   for row in arcpy.da.SearchCursor(fc, ["SHAPE@"]):
     # get the extent of the county boundary
     ext = row[0].extent
     # print out the bounding coordinates and spatial reference
     print("XMin: " + ext.XMin)
     print("XMax: " + ext.XMax)
     print("YMin: " + ext.YMin)
     print("YMax: " + ext.YMax)
     print("Spatial Reference: " + ext.spatialReference.name)

   import arcpy
   fc = "c:/data/city.gdb/streets"
   # For each row print the Object ID field, and use the SHAPE@AREA
   # token to access geometry properties
   with arcpy.da.SearchCursor(fc, ("OID@", "SHAPE@AREA")) as cursor:
     for row in cursor:
       print("Feature {0} has an area of {1}".format(row[0], row[1]))

[<map layer u'City of Austin Bldg Permits'>, <map layer u'Hospitals'>, <map layer u'Schools'>, <map layer u'Streams'>, <map layer u'Streets'>, <map layer u'Streams_Buff'>, <map layer u'Floodplains'>, <map layeru'2000 Census Tracts'>, <map layer u'City Limits'>, <map layer u'Travis County'>]