Question

我知道有一些主题告诉我们使用.strip（）或.rstrip（）函数来执行此操作，但它不适用于我。

我有一个程序在csv文件中附加一个新行，但不幸的是它会生成一个尾随逗号... 我试图在python中使用.strip（）函数将其删除但是它运行不正常，我做错了什么？这是我输入＆＃39; T123＆＃39;对于Bike_No和＆＃39; 05/08/2017＆＃39; for Purchase_Date

 from datetime import datetime
    td= datetime.now()
    initial_bike_detaillist=[]
    deBatt =100
    deKM = 0.00
    deDate = str(td)[8:10] + "/"+ str(td)[5:7] + "/"+ str(td)[0:4]
    print("Option 4: Add abicycle \n")
    Bike_No=input("Bike No. :")
    Purchase_Date=str(input("Purchase Date:"))
    initial_bike_detaillist=[str(Bike_No),str(Purchase_Date),str(deBatt),str(deDate),str(deKM)]#because there  is no write function for int
    filename="Assignment_Data1.csv"
    file=open(filepath + filename,"a")
    file.write("\n")
    for k in initial_bike_detaillist:
        file.write("{},".format(k))
    print("Bicycle ({}) has been created".format(Bike_No))
    file.close()
    file=open(filepath + filename,"r")
    for line in file:
        line.strip()
        print(line)

预期产出=

Bike No.,Purchase Date,Batt %,Last Maintenance,KM since Last 

T101,10/04/2016,55,10/01/2017,25.08

T102,01/07/2016,10,15/05/2017,30.94

T103,15/11/2016,94,13/06/2017,83.16

T104,25/04/2017,58,10/01/2017,25.08

T105,24/05/2017,5,20/06/2017,93.80

T123,04/04/2017,100,05/08/2017,0.0

实际输出：

Bike No.,Purchase Date,Batt %,Last Maintenance,KM since Last 

T101,10/04/2016,55,10/01/2017,25.08

T102,01/07/2016,10,15/05/2017,30.94

T103,15/11/2016,94,13/06/2017,83.16

T104,25/04/2017,58,10/01/2017,25.08

T105,24/05/2017,5,20/06/2017,93.80

T123,04/04/2017,100,05/08/2017,0.0,

`

Answer 1

而不是这一行：

for k in initial_bike_detaillist:
    file.write("{},".format(k))

使用以下行：

file.write(','.join(initial_bike_detaillist))

您的代码：

from datetime import datetime

td = datetime.now()
initial_bike_detaillist = []
deBatt = 100
deKM = 0.00
deDate = str(td)[8:10] + "/" + str(td)[5:7] + "/" + str(td)[0:4]
print("Option 4: Add abicycle \n")
Bike_No = input("Bike No. :")
Purchase_Date = str(input("Purchase Date:"))
initial_bike_detaillist = [str(Bike_No), str(Purchase_Date), str(deBatt), str(deDate),
                           str(deKM)]  # because there  is no write function for int
filename = "Assignment_Data1.csv"
file = open(filepath + filename, "a")
file.write("\n")
# for k in initial_bike_detaillist:
#   file.write("{},".format(k))
file.write(','.join(initial_bike_detaillist)) # use this line .

print("Bicycle ({}) has been created".format(Bike_No))
file.close()
file = open(filepath + filename, "r")
for line in file:
  # line.strip() # Then, not need this line
  print(line)

如何删除csv文件python的所有行中的逗号

1 个答案: