在 python 中写入、读取和排序列表列表

Posted 2023-05-07

【中文标题】在 python 中写入、读取和排序列表列表

【英文标题】：Write, Read and Sort List of Lists in python

【发布时间】：2020-05-12 07:51:56

【问题描述】：

我有 player_list。我想保存在这样的文件中。

> John, 10
> Raymond, 20
> Oscar, 15

player_list = [['John', 10], ['Raymond', 20], ['Oscar', 15]]
# player_list.append(['Micheal',9])
# print(player_list)
with open('score_test.txt', 'w') as f:
    for item in player_list:
        f.write(", \n".format(item[0], item[1]))

然后读取'score_test.txt'文件并像这样打印 [['约翰'，10]，['雷蒙德'，20]，['奥斯卡'，15]]

with open('score_test.txt', 'r') as file:
    words = file.read().splitlines()
print(words)

然后追加 ['Micheal',19] 并变成 [['John', 10], ['Raymond', 20], ['Oscar', 15],['Micheal',19]]

然后对其标记进行排序 [['Raymond', 20],['Micheal',19],['Oscar', 15],['John', 10]] 然后再次写入文件。谢谢

【问题讨论】：

你有什么问题？

那么您需要排序或读取文件或写入文件方面的帮助吗？

【参考方案1】：

player_list = [['John', 10], ['Raymond', 20], ['Oscar', 15]]

with open('a.txt','w') as filee:
  for val in player_list:
    filee.write(f'val[0], val[1]')
    filee.write('\n')

d = []

with open('a.txt', 'r') as file:
    words = file.read().splitlines()
    for word in words:
      temp = word.split(',')
      temp[1] = int(temp[1].strip())
      d.append(temp)

d.append(['Micheal',19])

player_list = sorted(d, key=lambda x:x[1], reverse=True)

with open('a.txt','w') as filee:
  for val in player_list:
    filee.write(f'val[0], val[1]')
    filee.write('\n')

我想这可能会对你有所帮助。