在csv文件中对整数进行排序-python

Question

I have a csv file that looks like this:

Tom,10
Jack,10
Alice,10
Ben,9

I need to be able to sort by the second column from highest to lowest. I have tried the following code:

import csv

file = open("bestscores.csv","r")
reader = csv.reader(file, delimiter = ' ')

sort = sorted(reader,key=lambda x: int(x[1]), reverse=True)
print(sort)

This results in the following error:

ValueError: invalid literal for int() with base 10: 'Tom,10'

How can I solve this?

Answer 1

You are using the wrong delimiter and sorting the wrong index. This should work for you:

import csv

with open("bestscores.csv","r") as fh
  reader = csv.reader(fh, delimiter = ',')

  sort = sorted(reader, key=lambda x: int(x[1]), reverse=True)
  print(sort)

Answer 2

You could do like this also,

with open('file') as f:
    print(''.join(sorted(f, key=lambda x: int(x.split(',')[1]), reverse=True)))