Iterate through fishnet polygons for extents and update field

Question

I am new to Python.

I'm creating a Script Tool in 10.8.2 that generates polygons from Create Fishnet of 1 deg x 1 deg and a new field GEOCELL. I need to update field GEOCELL with the lower left corner extents latitude and longitude (XMin and YMin presumably) so that each polygon updates to "N50E015" format. Currently it is crashing on the extents line which originally came from an arcpy.SearchCursor script I found, however that script updated every polygon with the same string from the last polygon.

AttributeError: 'NoneType' object has no attribute 'extent'

    with arcpy.da.UpdateCursor(layer1x1, "GEOCELL") as cursor:
        for row in cursor:
            extent = row[0].extent
            lat = int(extent.YMin)
            lon = int(extent.XMin)  
            
            # Set variables to buffer single and double lat/lon digits with leading zeros
            # North/South
            if lat > -1 and lat < 10:
                ns = "N0"
            elif lat > 9 and lat < 80:
                ns = "N"
            if lat > -10 and lat < 0:
                ns = "S0"
            elif lat > -81 and lat < -9:
                ns = "S"
                
            # East/West
            if lon > -1 and lon < 10:
                ew = "E00"
            elif lon > 9 and lon < 100:
                ew = "E0"
            elif lon > 99 and lon < 180:
                ew = "E"
            if lon > -10 and lon < 0:
                ew = "W00"
            elif lon > -100 and lon < -9:
                ew = "W0"
            elif lon > -181 and lon < -99:
                ew = "W"
            
            # North/South Absolute values
            if lat < 0:
                nspos = str(lat * -1)
            elif lat > -1:
                nspos = str(lat)
                
            # East/West Absolute values
            if lon < 0:
                ewpos = str(lon * -1)
            elif lon > -1:
                ewpos = str(lon)
                
            # Geocell Name
            geocell = ns + nspos + ew + ewpos 
            rows.updateRow(row)
            

Answer 1

You need to get the polygons geometry object before you can get the extents for each polygon. As you have it you are asking for the extents of GEOCELL (which looks to be a text field in your data).

Try

with arcpy.da.UpdateCursor(layer1x1, ["GEOCELL", 'SHAPE@']) as cursor:
for row in cursor:
    extent = row[1].extent
    lat = int(extent.YMin)
    lon = int(extent.XMin)  
    
'#Your if/else statements here to build your string'


row[0] = 'your string here'
cursor.updateRow(row)