如果 Findall 找到搜索模式，则在文件中插入新行

Question

我想在找到搜索模式后向文件添加新findall行。我使用的代码仅将输入文件的内容写入输出文件。它不会向输出文件添加新行。如何修复我的代码？

import re
text = """
Hi! How are you?
Can you hear me?
"""
with open("input.txt", "r") as infile:
readcontent = infile.readlines()
with open("output.txt", "w") as out_file:
for line in readcontent:
x1 = re.findall(text, line)
if line == x1:
line = line + text
out_file.write(line)

输入.txt：

ricochet robots
settlers of catan
acquire
Hi! How are you?
Can you hear me?
this is very valuable
finish

期望输出.txt：

ricochet robots
settlers of catan
acquire
Hi! How are you?
Can you hear me?
Added new line
this is very valuable
finish

Answer 1

此处不使用regex。检查当前行，如果是要检查的行，请添加换行符。

with open("output.txt", "w") as out_file:
for line in readcontent:
out_file.write(line)
if line.strip() == 'Can you hear me?':
out_file.write('n')

如果你需要一个regex本身，请选择以下内容(尽管我永远不会推荐(：

with open("output.txt", "w") as out_file:
for line in readcontent:
out_file.write(line)
if re.match('Can you hear me?', line.strip()):
out_file.write('n')

Answer 2

尝试遍历每一行并检查您的文本是否存在。

前任：

res = []
with open(filename, "r") as infile:
for line in infile:
if line.strip() == "Hi! How are you?":
res.append(line.strip())
lineVal = (next(infile)).strip() 
if lineVal == "Can you hear me?":
res.append(lineVal)
res.append("n Added new line n")
else:
res.append(line.strip())

with open(filename1, "w") as out_file:
for line in res:
out_file.write(line+"n")

输出：

ricochet robots
settlers of catan
acquire
Hi! How are you?
Can you hear me?
Added new line 
this is very valuable
finish

Answer 3

这是你想要的吗：

text = "Can you hear me?"
with open("input.txt", "r") as infile:
readcontent = infile.readlines()
with open("output.txt", "w") as out_file:
for idx,line in enumerate(readcontent):
if line.rstrip() == text:
line+='nAdded new linenn'
out_file.write(line)

output.txt将如下所示：

ricochet robots
settlers of catan
acquire
Hi! How are you?
Can you hear me?
Added new line
this is very valuable
finish