topic Re: TypeError: value #1 - unsupported type: list in Python Questions

TypeError: value #1 - unsupported type: list

JaredPilbeam2 — Mon, 03 May 2021 21:41:37 GMT

I'm trying to slice with an index to get everything that comes after the first value in the MAIL_AD1 field and use the update cursor to put it in the Name_First field. As of now I can only get the second value and nothing more.

Here's the table I'm working with:

This puts the correct value in the Name_Last field:

fc = r"C:/pathto/fc" field = ['MAIL_AD1', 'Name_First', 'Name_Last'] def Name_Last(): # this function updates the Name_Last field with arcpy.da.UpdateCursor(fc, field) as cursor: for row in cursor: name = row[0] #get name in MAIL_AD1 list if name is None: continue # continue to the next iteration in loop if None s = str(unit).split() #split strings in MAIL_AD1 field row[2] = s[0] #update Name_Last field with first value in MAIL_AD1 field cursor.updateRow(row) del cursor

But when I try to slice with an index number I get the error, which happens on the row[1] = s[1:] line.

def Name_First(): #this function updates the Name_First field with arcpy.da.UpdateCursor(fc, field) as cursor: for row in cursor: unit = row[0] #get Unit in field list if unit is None: continue # continue to the next iteration in loop if None s = str(unit).split() #split strings in MAIL_AD1 field row[1] = s[1:] #update Name_First field with what comes after first value in MAIL_AD1 field cursor.updateRow(row) del cursor

TypeError: value #1 - unsupported type: list

Re: TypeError: value #1 - unsupported type: list

Tomasz_Tarchalski — Mon, 03 May 2021 21:53:55 GMT

Your slicing retourns list (s[1:]) with one value, but you cannot insert it into row. Just replace s[1:] with s[1:][0]

Re: TypeError: value #1 - unsupported type: list

JaredPilbeam2 — Tue, 04 May 2021 14:23:21 GMT

@Tomasz_Tarchalski
If I run

row[1] = s[1:][0] print(row[1])

it's only returning one value.

DENNIS KYLE LINDA SUSAN MICHAEL NEILL PAMELA ...

This is what I'm expecting:

DENNIS J KYLE LINDA KAY LVG TR SUSAN K MICHAEL JO ANN NEILL DANIEL J PAMELA ...

If I do this it's back in a list again.

row[1] = s[1:][0:] print(row[1])

Prints:

['DENNIS', 'J'] ['KYLE'] ['LINDA', 'KAY', 'LVG', 'TR'] ['SUSAN', 'K'] ['MICHAEL', 'JO', 'ANN'] ['NEILL', 'DANIEL', 'J'] ['PAMELA'] ...

Re: TypeError: value #1 - unsupported type: list

Tomasz_Tarchalski — Tue, 04 May 2021 20:56:18 GMT

s = str(unit).split() # it returns list of ['Lovato', 'Dennis', 'J'] b = s[1:] # returns a list of ['Dennis', 'J'] # so in fact you must again convert list into string like this c = " ".join(b) # it should retourn a string "Dennis J". you joined by space #or c = ", ".join(b) # should retourn "Dennis, J".

Advice: for this kinds of test run python directly in command line and test it. Or install Visual Studio code, install Python extention and run debugging. or test in arcgis pro notebook...

Regards, Tomasz

Re: TypeError: value #1 - unsupported type: list

JaredPilbeam2 — Tue, 04 May 2021 21:06:32 GMT

Thanks @Tomasz_Tarchalski .

I was asleep at the wheel.