Copy Multiple (not all) attributes of a polyline to multiple polylines of same feature

Question

I have multiple fields in a feature. I need to copy multiple (5-6) attributes of a polyline to a different polyline in the same feature. To make things worse, I will have around 30 different polyline to copy the attributes to.

In this answer, I found copying of all attributes of a polyline to a different polyline. The only difference is that, I need to copy specific (multiple) attributes of a polyline to multiple polylines in the same feature.

Answer 1

You could do it like this (maybe not the easiest way though) but be careful, you cant undo the changes:

Open the attribute table and select the single row you wish to copy from. Using the Python window execute this code to store the attributes in the variable attributes:

with arcpy.da.SearchCursor("Points12345",['Field1','Field2','Field3']) as cursor:
    for row in cursor:
        attributes=row

Clear the selection and then Select only the rows you wish to paste the attributes into and execute this code:

with arcpy.da.UpdateCursor("Points12345",['Field1','Field2','Field3']) as cursor:
    for row in cursor:
        row=attributes
        cursor.updateRow(row)

You need to change "Points12345" and the field names (and add/remove fields) to match your data.

Before: After: