With arcpy, I want to calculate the mean value of a specific field in a shapefile and print the resulting value for the user. I use the Summary Statistics tool and it works, but the resulting value is stored in a table at a specific path, but how can I access the calculated value with python?

Here is my code. It will only output the path to the table, but I need the calculated value.

stats = arcpy.Statistics_analysis(myshapefile, "G:/temp/stats", [[field, "MEAN"]])

The way I would recommend to access the contents of a table is by using arcpy.da.SearchCursor() to read it:

SearchCursor establishes read-only access to the records returned from a feature class or table.

Returns an iterator of tuples. The order of values in the tuple matches the order of fields specified by the field_names argument

The asker also:

found a useful function on this website: https://arcpy.wordpress.com/2012/02/01/calculate-a-mean-value-from-a-field/

which groups the Summary Statistics with a Search Cursor to read its output and return the Mean value from a field.

  • 1
    I tried that and it worked out - thanks a lot! I also found a useful function on this website: arcpy.wordpress.com/2012/02/01/…
    – the_chimp
    Mar 15 '16 at 7:46
  • 1
    Can you please include how the code works on the real data? I am not sure, how exactly use "def" in my script. Is the "na" object where my mean value is stored? Thank you!
    – maycca
    Jan 12 '18 at 16:52
  • @maycca my answer makes no mention of "def" or "na" so it sounds like you need to ask a new question to let us know precisely what you want to do, what you have tried, and where you are stuck.
    – PolyGeo
    Jan 13 '18 at 0:27

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