Question

我有一个像这样的test.txt文件：

1 - test
2 - 
3 - test
4 -

（数字只是例如）

和我的python代码：

with open('test.txt') as infile, open('output.txt', 'w') as outfile:
    for line in infile:
        if not line.strip(): continue  # skip the empty line
        outfile.write(line)

但是output.txt是：

1 - teste
2 - teste
3 -

我也想删除最后一行，但不要删除最后一行的代码：

lines = file.readlines()
lines = lines[:-1]

如果是空行，如何删除最后一行检查？

谢谢！

Answer 1

你在末尾有一个空行的原因是因为最后一行以换行结束。要从最后一行删除换行符，可以将所有行读入列表，然后删除最后一行：

with open('test.txt') as infile, open('output.txt', 'w') as outfile:
    # remove empty lines
    lines = [line for line in infile if line.strip()]

    # remove the newline from the last line
    if lines:
        lines[-1] = lines[-1].rstrip('\r\n')

    # write everything to disk
    outfile.writelines(lines)

Answer 2

这是一个解决方案：

with open('test.txt') as infile, open('output.txt', 'w') as outfile:
    lines = "\n".join([line.strip() for line in infile if line.strip()])
    outfile.writelines(lines)

Python - 从.txt删除空行，但最后一行不要删除

2 个答案: