Question

好的，基本上我正在尝试访问包含如下数据的文本文件：

John 01
Steve 02
Adam 15

我正在访问它，从每行中分割整数并从变量“days”中的每一行中减去一个。然后在从每一行中减去一个之后，我运行一个if语句来查看是否有任何行包含“0”，如果该行包含0它应该删除整行（数字和名称），然后用新的重新打印名称几天 - 1.我的代码在控制台中完美运行，并且名称打印完美，并且删除，我只是遇到了这样一个事实，即每行都打印了最后几天的值而不是它自己的值。例如：

Steve 14
Adam 14

虽然史蒂夫应该在01岁，但是他接受了亚当的14岁。我的代码附在下面：

global days
global names
with open('tracker.txt', 'r') as f:
    for line in f:
        days = line.strip()[-2:]
        names = line.strip()[:-3]
        days = int(days) - 1
        print(names +" "+str(days))

        if days == 0:
            f = open("tracker.txt","r")
            lines = f.readlines()
            f.close()
            f = open("tracker.txt","w")
            for line in lines:
                if line!=str(names)+ " 01" +"\n":
                    f.write(line[:-3]+ "" + str(days) + "\n")
            f.close()
    f.close()

Answer 1

行。我不确定我理解你要做什么，但试试看：

import os

# The file name of our source file and the temporary file where we keep
# our filtered data before copying back over source file
source_file_name = 'tracker.txt'
temporary_file_name = 'tracker_temp.txt'

# Opening the source file using a context manager
with open(source_file_name, mode='r') as source_file:
    # Opening our temporary file where we will be writing
    with open(temporary_file_name, mode='w') as temporary_file:
        # Reading each line of the source file
        for current_line in source_file:
            # Extracting the information from our source file
            line_splitted = current_line.split()
            current_name = line_splitted[0]
            current_days = int(line_splitted[1])

            # Computing and print the result
            future_days = current_days - 1
            print(current_name, future_days)

            # Writing the name and the computed value
            # to the temporary file
            if future_days != 0:
                output_line = "{} {:02}\n".format(current_name, future_days)
                temporary_file.write(output_line)

# After we went through all the data in the source file
# we replace our source file with our temporary file
os.replace(temporary_file_name, source_file_name)

告诉我。那是你想要做的吗？没有？那么请告诉我们更多详情！

如何写入文本文件而不在线上重复数据？

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