ArcPy spot number - automatically fill according to field length

ArcPy图斑编号-Automatically fill according to the field length

# -*- coding:utf8 -*-
import arcpy
import os

workspace = r'E:\yyy.gdb'
arcpy.env.workspace = workspace
featureclasses = arcpy.ListFeatureClasses()
# 起始编号
i = 1
for fc in featureclasses:
    cur = arcpy.da.UpdateCursor(fc, ['ZLDWDM','OBJECTID' 'TBBH'])
    for row in cur:
        try:
            # Before intercepting the location feature code12位
            zldwdm12 = str(row[0])[0:12]
            ss = str(i).rjust(6, '0')
            row[2] = zldwdm12 + ss
            cur.updateRow(row)
            print(str(row[1]) + '---Finish')
            i = i + 1
        except:
            print(str(row[1]) + '---Error')
    print(fc)

python String completion padding method for a fixed length

1.rjust() ：返回一个原字符串右对齐,并使用空格填充至长度 width 的新字符串.如果指定的长度小于字符串的长度则返回原字符串.

语法：
str.rjust(width[, fillchar])
width – 指定填充指定字符后中字符串的总长度
fillchar – 填充的字符,默认为空格

str.rjust(width,'0') 
input: '798'.rjust(32,'0')
output: '00000000000000000000000000000798'

1.ljust() ：返回一个原字符串左对齐,并使用空格填充至指定长度的新字符串.如果指定的长度小于原字符串的长度则返回原字符串.
语法：
str.ljust(width[, fillchar])
width – 指定填充指定字符后中字符串的总长度
fillchar – 填充的字符,默认为空格

str.ljust(width,'0') 
input: '789'.ljust(32,'0')
output: '78900000000000000000000000000000'