Question

遇到代码问题。给出了一个名为“racing.csv”的文件，该文件存储了“Drive”类中的变量。问题背后的概念是程序应该对比赛时间（从最低到最高）进行排序，并为前三名选手分配点，然后将此数据导出到新文件。除了我在驱动器上调用shortBubbleSort并且没有正确排序竞争对手时，所有代码都正常工作。感谢帮助。

import csv
class Drive(object):
    driver = ""
    team = ""
    racetime = 0.0
    points = 0

    def __init__(self,driver,team,racetime,points):
        self.driver = driver 
        self.team = team
        self.racetime = racetime 
        self.points = points

f = open('racing.csv', 'r')
csv_f = list(csv.reader(f))

driverclasses = [] 
for i in range(len(csv_f)): 
    d = Drive(csv_f[i][0],csv_f[i][1],csv_f[i][2],csv_f[i][3]) 
    driverclasses.append(d)

for row in csv_f:
    print (row)

for x in range(0, 6):
    csv_f[x][2]=(input("Enter Racetime"))

def shortBubbleSort(alist):
    exchanges = True
    passnum = len(alist)-1
    while passnum > 0 and exchanges:
       exchanges = False
       for i in range(passnum):
           if alist[i]>alist[i+1]:
               exchanges = True
               temp = alist[i]
               alist[i] = alist[i+1]
               alist[i+1] = temp
       passnum = passnum-1

shortBubbleSort(Drive)
print(csv_f)

csv_f[0][3] = 25
csv_f[1][3] = 18
csv_f[2][3] = 15


f = open('RacingResults.csv', 'w')
for row in csv_f:
        print (row)

Answer 1

这有帮助吗？

**范围函数sintax *：def shortBubbleSort(alist): for passnum in range(len(alist)-1,0,-1): for i in range(passnum): if alist[i]>alist[i+1]: temp = alist[i] alist[i] = alist[i+1] alist[i+1] = temp

start：序列的起始编号。

停止：生成最多但不包括此数字的数字。

步骤：序列中每个数字之间的差异。

extension=php_openssl.dll

对csv文件中的列进行排序（Python）

1 个答案: