4

I am trying to write a python script to extract certain values from a table: the table I am referring to is a big collection of nitrate values for different water depths, which are deposited in the columns of the table. As I only need the value of the surface and the deepest point, I want to search through the rows and extract the last value that is not 0. I have started writing a script using the SearchCursor Tool but get stuck at the point, where I want it to search for the first 0-value and then go back and print the value fro mthe column before... Does anyone have an idea how to solve that problem?

import arcpy

# Set the Workspace
arcpy.env.workspace = "D:\Teresa\Kerstin\SouthernOcean\03_workspace\Teresa"

# Make table
table = "C:/Users/theidema/Desktop/OxzUti_GridP_Annual.csv"

#Create the search cursor
cursor = arcpy.SearchCursor(Table)

#Iterate through the rows
row = cursor.next()
while row:
    print (row.getValue(field))
    row = cursor.next()

Here is a Screenshot of the table (depths go down until 5500M)

enter image description here

  • 1
    Teresa, what is your version of ArcGIS? – Alex Tereshenkov Aug 19 '14 at 7:41
  • 1
    could you please add an view of your table to illustrate your problem? I don't understand if you need to iterate on the columns or on the rows. What version of ArcGIS are you using ? – radouxju Aug 19 '14 at 7:46
  • I am using the 10.2.1. Version! – Teresa Heidemann Aug 19 '14 at 8:20
  • You may want to think about using Summary Statistics (MAX—Finds the largest value for all records of the specified field) rather than ArcPy to get this but I am not 100% clear on your requirements. – PolyGeo Aug 19 '14 at 8:46
2
list_of_fields_with_depth = (x.name for x in arcpy.Listfields(Table, "wildcard"))
cursor = arcpy.da.SearchCursor(Table, list_of_fields_with_depth)

#Iterate through the rows

for row in rows:
    for i in range(len(list_of_fields_with_depth)):
        if ( (row[i] == 0) and (i>0) ):
            print row[i-1]
            break
        else:
            print "no zero on this line" 

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.