问如何读取csv文件并打印一些处理后的数据？

EN

import csv
import sys
import datetime
import math
import re

f=open('VehicleMaster.csv','r')
try:
    reader=csv.DictReader(f,delimiter=',')
    num=' '
    regx= re.compile('[,-/]')
    for row in reader:
        dt1=row['Date_Registered']
        for xd in dt1.splitlines():
            d,m,y=regx.split(xd)
            dt2=('/'.join((d.zfill(2),m,'20'+y.zfill(2) if len(y)==2 else y)))
            row['Date_Registered']=dt2
            dt3= str(datetime.datetime.strptime(dt2,'%d/%b/%Y').date())
            #print(dt3)
            row['Date_Registered']=dt3![enter image description here][1]
            #print(row)
            print(num, '\t'.join(row))
            if num == ' ':
                    num=0
            num=num+1

Workstream_from_AL  Manager work_steam  risk_score  Base    Count   Total_Downtime_Hours    Class   Vehicle_Description C111111 Total_Maint_Costs   Date_Registered smr Workstream  Latest_Mileage  Base_Location   Major_Repair_   Average_Downtime_Hours  Age_in_Months__17_Mar_15_   Status  Ob_Board_Power_ No_of_SMR_Jobs  Reg_Number  down_time   Cost_Centre mileage Workshop    age Date_of_Reading
1 Workstream_from_AL    Manager work_steam  risk_score  Base    Count   Total_Downtime_Hours    Class   Vehicle_Description C111111 Total_Maint_Costs   Date_Registered smr Workstream  Latest_Mileage  Base_Location   Major_Repair_   Average_Downtime_Hours  Age_in_Months__17_Mar_15_   Status  Ob_Board_Power_ No_of_SMR_Jobs  Reg_Number  down_time   Cost_Centre mileage Workshop    age Date_of_Reading
2 Workstream_from_AL    Manager work_steam  risk_score  Base    Count   Total_Downtime_Hours    Class   Vehicle_Description C111111 Total_Maint_Costs   Date_Registered smr Workstream  Latest_Mileage  Base_Location   Major_Repair_   Average_Downtime_Hours  Age_in_Months__17_Mar_15_   Status  Ob_Board_Power_ No_of_SMR_Jobs  Reg_Number  down_time   Cost_Centre mileage Workshop    age Date_of_Reading
3 Workstream_from_AL    Manager work_steam  risk_score  Base    Count   Total_Downtime_Hours    Class   Vehicle_Description C111111 Total_Maint_Costs   Date_Registered smr Workstream  Latest_Mileage  Base_Location   Major_Repair_   Average_Downtime_Hours  Age_in_Months__17_Mar_15_   Status  Ob_Board_Power_ No_of_SMR_Jobs  Reg_Number  down_time   Cost_Centre mileage Workshop    age Date_of_Reading