Question

我有一个文件，我需要删除文件中间的一些行。

我需要删除的行在开头和结尾都有一个关键字。

示例：

aaaaaaaaaaaaaaaaa
bbbbbbbbbbbbbbbbb
ccccccccccccccccc
ddddddddddddddddd
Begintoremove
eeeeeeeeeeeeeeeee
fffffffffffffffff
ggggggggggggggggg
hhhhhhhhhhhhhhhhh
EndofRemove
iiiiiiiiiiiiiiiii
jjjjjjjjjjjjjjjjj
kkkkkkkkkkkkkkkkk
lllllllllllllllll

我需要有一个脚本，当然是在python中，删除关键字＆＃34; Begintoremove＆＃34;之间的文本部分。和＃34; EndofRemove＆＃34;。

您认为可以做到这一点，如果可以的话，使用哪种Python函数？

Answer 1

从文件中读取行并将其复制到第二行，具体取决于当前的copying状态：

copying = True
with open('input_file.txt', 'rt') as inf, open('output_file.txt', 'wt') as outf:
    for line in inf:
        if copying:
            if line.startswith('Begintoremove'):
                copying = False
            else:
                outf.write(line)
        elif line.startswith('EndofRemove'):
            copying = True

Answer 2

f = open('filename')
lines = f.readlines()
f.close()

result = []
bool_remover = False
for line in lines:
    if line == "Begintoremove" : bool_remover = True
    if not bool_remover : result.append(line)
    if line == "EndofRemove" : bool_remover = False

我在结果中不包括“Begintoremove”和“EndofRemove”。

Answer 3

with open('file_path', 'r') as my_file:
    file_lines = my_file.readlines()

first_part = file_lines[:file_lines.index('Begintoremove')]
second_part = file_lines[file_lines.index('Endtoremove') + 1:]

lines = first_part + second_part
with open('file_path', 'w') as my_file:
    my_file.writelines(lines)

Python：删除文件中的多行

3 个答案: