Directions using arcpy

PawanVuppala

Hello guys,
I am trying to use arcpy to generate directions for each route and save it for each day.  From help section this is what I have.

arcpy.na.Directions("Network Analysis Layer","TEXT","C:/temp/" + day1 + ".txt","Miles","REPORT_TIME","Minutes")

If I have an mxd which has a VRP Layer, how to best use arcpy to access it and loop to generate all directions.  I have my routes named as Day1, Day2, Day3 etc.,

Please help!!

Thanks in advance
-Pawan
ArcGIS Desktop 10.1 (Advanced)

Melinda Morang

Hi!  If you have an MXD with several layer files saved in it already, you can access those layer files and put them into a list as follows:

#Get a list of all the layers in the map document
mxd = arcpy.mapping.MapDocument(mxd_path)
lyrs = arcpy.mapping.ListLayers(mxd)
#Filter the list to obtain only the network analyst layers
na_layers = [lyr for lyr in lyrs if lyr.isNetworkAnalystLayer]

You can then iterate through this list when generating directions.
If you're doing this from the python window in ArcMap instead of a standalone script, replace mxd_path in the script above with "CURRENT".