topic Split Attribute field in Python Questions

Split Attribute field

PV — Thu, 09 Oct 2014 09:19:02 GMT

I have an Attribute table with several attributes

One of the attributes has the fields

K1-10-11

K1-10-46

K1-10-46c

K1-10-67d (street)

I Need all of the elements from the field as seperate attributes

eg an Attribute with

K1
K1

another with

and a last one with

46c

67d (without text)

I cannot do this manually. Is there a way to do this in ArcGIS 10.1 ?

Furthermore I am wondering if it is possible to connect attribute tables with Excel tables without loading the Excel tables (csv) into ArcGIS?

Thanks!

Re: Split Attribute field

RiyasDeen — Thu, 09 Oct 2014 10:28:20 GMT

Add your new fields using Add Field ArcGIS Help 10.1
Use Calculate field to calculate values ArcGIS Help 10.1
VBScript Expressions for each field in order Split(<<Your sourceField>>, "-")(0), Split(<<Your sourceField>>, "-")(1) and Trim(Mid(Split( [SURVEY_ID] , "-")(2), 1, InStr(Split( [SURVEY_ID] , "-")(2), "(") - 1))
Use Join Field to join with excel sheets ArcGIS Help 10.1

Re: Split Attribute field

DanPatterson_Retired — Sat, 11 Dec 2021 08:05:07 GMT

and for the pythonistas


>>> a = ['K1-10-11','K1-10-46','K1-10-46c','K1-10-67d (street)']
>>> for aval in a:
...  c0 = aval.split("-")[0]
...  c1 = aval.split("-")[1]
...  c2 = (aval.split("-")[2]).split(" ")[0]
...  print(" first: {0}  second: {1}  third: {2}".format(c0,c1,c2))
... 


first: K1  second: 10  third: 11
 first: K1  second: 10  third: 46
 first: K1  second: 10  third: 46c
 first: K1  second: 10  third: 67d
>>> # in arcmap field calculator using Python interpretor
>>> #  !sourceFld!.split("-")[0]  #for 1st field
>>> #  !sourceFld!.split("-")[1]  #for 2nd field
>>> #  (!sourceFld!.split("-")[2]).split(" ")[0]  #for 3rd field

Re: Split Attribute field

PV — Thu, 09 Oct 2014 13:56:59 GMT

Thank you it seems to work! Allthough not when I have

a case with text like this K1-10-67d (street)

For the last two fields I get a 0 instead of a 10 and a 67d

I ve no Phyton experience at all (yet)

Re: Split Attribute field

PV — Thu, 09 Oct 2014 13:59:34 GMT

Thank you!
I am not quite sure how to handle the second and third field

Trim(Mid(Split( [SURVEY_ID] , "-")(2), 1 resp. the 3rd field InStr(Split( [SURVEY_ID] , "-")(2), "(") - 1))
I guess SURVEY_ID has to be replaced with the original sourcefield Name? . I see what trim and mid do but not what the (2), 1 stands for? Also i get an error when I try to run it in the field calculator..

Re: Split Attribute field

DanPatterson_Retired — Thu, 09 Oct 2014 19:32:35 GMT

lets have a look in slow motion....

>>> #lets have a look in verbose form
>>> a = "K1-10-67d (street)"
>>> c0 = a.split("-")[0]
>>> c1 = a.split("-")[1]
>>> c2all = a.split("-")
>>> c2a, c2b, c2c = c2all
>>> print "c0: ", c0
c0:  K1
>>> print "c1: ", c1
c1:  10
>>> print "c2all", c2all
c2all ['K1', '10', '67d (street)']
>>> print "c2c: ", c2c.split(" ")[0]
c2c:  67d
>>> # hmmmmm works lets try it all at once
>>> a = "K1-10-67d (street)"
>>> c0, c1, c2_a_b = a.split("-")
>>> c2_a, c2_b = c2_a_b.split(" ")
>>> print (" c0: {0}, c1: {1},  c2_a: {2}  c2_b: {3}".format(c0, c1, c2_a, c2_b))
c0: K1, c1: 10,  c2_a: 67d  c2_b: (street)

So my original stuff seems to be correct, check your syntax

Re: Split Attribute field

PV — Fri, 10 Oct 2014 07:10:03 GMT

Seems to work (for most of the cases) when I change my field type to string! thanks!

Re: Split Attribute field

curtvprice — Thu, 16 Oct 2014 07:49:56 GMT

So, again, here's the input data (text field name: "DFIELD")

K1-10-11
K1-10-46
K1-10-46c
K1-10-67d (street)

Here's how to do it with with arcpy.da.UpdateCursor.

The try/except just skips the row and prints an error message if you have data issues.

for f in ["F1", "F2", "F3"]:
    arcpy.AddField_management("table.dbf", f, "TEXT", "", "", 10)
with arcpy.da.UpdateCursor("table.dbf", ["DFIELD", "F1", "F2", "F3"]) as rows:
    for row in rows:
        try:
            L = row[0].split("-")
            row[1], row[2], row[3] = L[:3]
            rows.updateRow(row)
        except Exception as msg:
            print("{} | {}".format(row[0], msg))