[英]Replacing value in a text file
我正在尝试制作一个跟踪玩家高分的功能。 该函数应将玩家的最高分保存在文本文件中。 如果在文本文件中找到玩家的名字,它应该查看新分数是否更高,如果更高,它将用新分数替换旧分数。
我尝试使用以下代码来做到这一点:
f1 = open('scores.txt', 'r')
f2 = open('scores.txt', 'a')
if f1.read() == "": #if txt.file is empty, add the name and highscore directly
f2.write(self.name)
f2.write(";")
f2.write('%d' % self.highscore)
f2.write("\n")
else: #if not empty...
with open("scores.txt", "r") as fin:
with open("scores.txt", "a") as fout:
for line in fin:
fields = line.strip(";")
if fields[0].lower() == self.name.lower(): #look if the players name is in textfile.
if int(fields[1]) < self.highscore: #if new score is higher, replace the old with it.
fout.write(line.replace(str(fields[1]), str(self.highscore)))
break
else:
pass
else: #if name not found in file, create new line.
fout.write(self.name)
fout.write(";")
fout.write('%d' % self.highscore)
fout.write("\n")
f1.close()
f2.close()
预期的结果是旧的分数被新的替换,但现在它正在创建新的,有时它甚至将相同的高分写在多行中。
您使用附加选项打开了 fout。 请改成“w+”
else: #if not empty...
with open("scores.txt", "r") as fin:
with open("scores.txt", "w+") as fout:
for line in fin:
fields = line.strip(";")
if fields[0].lower() == self.name.lower(): #look if the players name is in textfile.
if int(fields[1]) < self.highscore: #if new score is higher, replace the old with it.
fout.write(line.replace(str(fields[1]), str(self.highscore)))
break
else:
pass
else: #if name not found in file, create new line.
fout.write(self.name)
fout.write(";")
fout.write('%d' % self.highscore)
fout.write("\n")
我无法调试代码,因为没有 score.txt 的示例。 我希望这奏效了。
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