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Am interested in combining ClASS1 and SUBCLASS1 to form the one combined class. I wrote the expression as follows "() ()" format( !CLASS1!replace(" "","" ),( !SUBCLASS1!replace(" "","" ))as shown in the Image[![field to be combined and expression] [![enter image description here] enter image description here

but after executing I get the following error message error message

  • 1
    Please always present errors as text rather than pictures. – PolyGeo Jun 30 '17 at 21:44
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If spaces before or after the values in CLASS1 and SUBCLASS1 are the only issue, the expression could be simplified by using the strip method instead:

"{} {}".format(!CLASS1!.strip(), !SUBCLASS1!.strip())
0

As the error states, your syntax is wrong. I assume you want to replace spaces with commas. Try this line for your expression:

"{} {}".format(!CLASS1!.replace(" ",","),(!SUBCLASS1!.replace(" ",","))

EDIT:

Since I now see what your data looks like, I guess the .strip() option is the nicer choice. If you still want to use the .replace() function try this:

"{} {}".format(!CLASS1!.replace(" ",""),(!SUBCLASS1!.replace(" ",""))
  • Should 0 and 1 be in between the curly brackets? like this: "{0}{1}"... will still work if the curly brackets are empty? – Delonix R. Jun 30 '17 at 14:55
  • the {0} and {1} are only necessary, if you refer to the place markes in a different order. example: "{0} {1} {0}".format("A", "B") will return "A B A". so in this case they are not necessary. – dru87 Jun 30 '17 at 14:57
  • @DelonixR. if no indices are used in the expression, format will use the parameters in the order they are entered. – Bjorn Jun 30 '17 at 14:57

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