重写我的分数文本文件以确保它只有最后 4 个分数 (python)

Rewriting my scores text file to make sure it only has the Last 4 scores (python)


以前,在 SO 用户的帮助下,我能够找到如何在最大长度 属性 的 Python 文档中存储最多 4 个键字典里面。

现在,我想更进一步。下面是一个文本文件,其中包含我的参与者 - 戴夫、杰克和亚当的所有 最近 乐谱。

Jack:10
Dave:20
Adam:30
Jack:40
Adam:50
Dave:60
Jack:70
Dave:80
Jack:90
Jack:100
Dave:110
Dave:120
Adam:130
Adam:140
Adam:150

现在,这是我的代码,可以让我看到 Python 中的最后 4 个分数:

import collections
from collections import defaultdict
scores_guessed = collections.defaultdict(lambda: collections.deque(maxlen=4))
with open('Guess Scores.txt') as f:
    for line in f:
    name,val = line.split(":")
    scores_guessed[name].appendleft(int(val))

for k in sorted(scores_guessed):
    print("\n"+k," ".join(map(str,scores_guessed[k])))

writer = open('Guess Scores.txt', 'wb')

for key, value in scores_guessed.items():
   writer.writerow([key,':',value])

很明显,它将打印出字典的以下结果:

Adam 150 140 130 50

Dave 120 110 80 60

Jack 100 90 70 40

但是,我希望文件按字母顺序向我读出最后四个结果:

Adam:150
Adam:140
Adam:130
Adam:50
Dave:120
Dave:110
Dave:80
Dave:60
Jack:100
Jack:90
Jack:70
Jack:40

我认为这段代码行得通:

for key, value in scores_guessed.items():
   writer.writerow([key,':',value])

然而这个 returns 我的结果是:

AttributeError: '_io.BufferedWriter' object has no attribute 'writerow'

例如,如果亚当得了 200 分,我希望 scores_guessed 重写为:

Adam:200
Adam:150
Adam:140
Adam:130

出了什么问题?

UPDATE - 为了回应下面的第一个答案,我将最后一个代码块编辑为:

for key, value in scores_guessed.items():
    writer.write("{}:{}\n".format(key,value))

然而它给了我这个信息: writer.write("{}:{}\n".format(key,value)) 类型错误:'str' 不支持缓冲区接口

发生了什么事?

你使用的writer.writerow语法对应the csv module,用法如下:

import csv
with open('some_file.csv', 'wb') as csvfile:
    writer = csv.writer(csvfile, delimiter=' ',
                            quotechar='|', quoting=csv.QUOTE_MINIMAL)
    writer.writerow(['Spam'] * 5 + ['Baked Beans'])
    writer.writerow(['Spam', 'Lovely Spam', 'Wonderful Spam'])

在我看来,您使用了一些错误的引用来执行此操作,因为您没有在上面的代码中使用 csv 模块。

因此,更改您的以下代码

for key, value in scores_guessed.items():
   writer.writerow([key,':',value])

此代码:

for key, value in scores_guessed.items():       
    output = "%s:%s\n" % (key,value)
    writer.write(output)

编辑

您正在以二进制模式打开文件,而不是使用

以文本模式打开文件
writer = open('Guess Scores.txt', 'wt')
for key, value in scores_guessed.items():       
    output = "{}:{}\n".format(key,value)
    writer.write(output)
writer.close()

编辑 2

既然你用的是双端队列,那就用:

writer = open('Guess Scores.txt', 'wt')
for key, value in scores_guessed.items():       
    output = "{}:{}\n".format(key,','.join(map(str, scores_guessed[key])))
    writer.write(output)
writer.close()

或使用:

with open("output.txt", "wt") as f:
    for key in scores_guessed:
        f.write("{} {}".format(key, ','.join(map(str, scores_guessed[key]))))