Python：如何读取段落的每一行并复制具有特定单词的行

Question

有一段我需要阅读，我需要复制只有关键字的行。

段落是这样的：

aa
a
aaa
aaaaa
[new,aaa] < name of the file with path ] //asabbsjk
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[mod] <name of the file with path 

我的算法：

if keyword exists in the line :
      copy that line 
else: 
      leave it

Answer 1

试试这几行代码：

copy_lines= []
for line in paragraph.split('\n'):
    if keyword in line:
        copy_lines.append(line)
print(copy_lines)

或一个班轮：

copy_lines= [line for line in paragraph.split('\n') if keyword in line]

Answer 2

如果您尝试从文件中读取段落：

keyword = "your_keyword"

with open("demofile.txt", "r") as f:
    line_list = f.readlines()
    magic_lines = [line for line in line_list if keyword in line]