ArcGIS属性表字段自动编号

2018.11.8学习记录 ArcGIS属性表字段自动编号
属性表字段——字段计算器

Parser:
Python

Expression:
accumulate(!FieldA!)

Code Block:
total = 0
def accumulate(increment):
 global total
 if total:
  total += increment
 else:
  total = increment
 return total