arcgis-10.0arcpy
I assumed this would be an easy thing to do. I'm loading a point shapefile into a map like this:
layer = arcpy.mapping.Layer(file_name)
Is there a way to get the number of points in the shapefile? I see using the 'Describe' command that I can get some info about things… For instance,
arcpy.Describe(layer).table.fields
Gives me some info about the fields in the underlying table but I can't count the rows.
I don't think the geoprocessor object provides any clean way of separating out the response type, as most applications would with a log-level: if it does, there isn't anything apparent from the documentation.
I'd use the python logging module (documentation) to log the output you do care about, instead of using print statements:
import logging
LOG_FILENAME = 'example.log'
logging.basicConfig(filename=LOG_FILENAME, level=logging.INFO)
...
logging.info('stuff just happened, better write that down.')
Then use tail -f example.log or equivalent to watch the log.
I think you were missing closing your output text file - until you do that, you won't get anything written to the text file. Below code tested and works:
import arcpy
arcpy.env.workspace = r"C:\Users\chad\Documents\ArcGIS\Default.gdb"
arcpy.BuildRasterAttributeTable_management("raster17", "Overwrite")
outfile = open(r"D:\temp\raster17.txt", "w")
rows = arcpy.SearchCursor("raster17","","","Value;Count","")
for row in rows:
val = row.getValue("Value")
count = row.getValue("Count")
print val, count
outfile.write(str(val) + "," + str(count) + "\n")
outfile.close()
And it yields this text file:
Best Answer
Try
int(arcpy.GetCount_management(layer).getOutput(0)): here's the documentation.