将定界符添加到固定宽度的文本文件

Question

我正在尝试为固定宽度的文本文件添加分隔符。

这是我目前所拥有的：

list=[4,29,36,45,70,95,100,111,115,140,150,151,152,153,169]
with open('output.txt', 'w') as outfile:
    with open('input.txt', 'r') as infile:
        for line in infile:
            newline = line[:4] + '|' + line[4:]
            outfile.write(newline)
outfile.close()

上面的代码在第 5 个字节处插入了一个管道。我现在想在列表中的下一个值处添加一个管道 (29)。我正在使用 Python 2.7。

Answer 1

我认为这就是你想要做的：

list=[4,29,36,45,70,95,100,111,115,140,150,151,152,153,169]
with open('output.txt', 'w') as outfile:
    with open('results.txt', 'r') as infile:
        for line in infile:
            iter = 0
            prev_position = 0
            position = list[iter]
            temp = []
            while position < len(line) and iter + 1 < len(list):
                iter += 1
                temp.append(line[prev_position:position])
                prev_position = position
                position = list[iter]
            temp.append(line[prev_position:])

            temp_str = ''.join(x + "|" for x in temp)
            temp_str = temp_str[:-1]

            outfile.write(temp_str)

这需要一个输入文件并在列表中的位置插入一个|。这将处理小于或大于列表中值的情况。

Answer 2

快速破解。检查它是否有效：

list=[4,29,36,45,70,95,100,111,115,140,150,151,152,153,169]
with open('output.txt', 'w') as outfile:
    with open('input.txt', 'r') as infile:
        for line in infile:
            for l in list:
                newline = line[:l] + '|' + line[l:]
                outfile.write(newline)
# outfile.close() -- not needed