Question

我想在具有特定值的文件中搜索并给出换行符并写入现有文件和单独的文件

源代码

input_file= "test.txt"
putput_file="result.txt"
def search_break(input_file):
    with open(input_file) as f:
        lines = f.readlines()
        print lines
        for i in range(len(lines)):
            if i == "Foo":
                print
        print lines[i]
            if i== "50.000"
                print
        print lines[i]

            f.close()



print search_break(input_file)

输入文件 -test.txt

50.000
0.6016
1.0000
Foo
0.7318
1.0000

输出文件 -test.txt

50.000
0.6016
1.0000

Foo
0.7318
1.0000

输出文件 -result.txt

50.000
0.6016
1.0000

Foo
0.7318
1.0000

任何建议都会非常感激。谢谢。

Answer 1

readlines保留换行符，因此您需要在测试之前将其删除，否则它将永远不会匹配。我还将所有搜索词组合成一个set，并简化了循环：

with open(input_file) as f:
    for line in f:
        if line.strip().lower() in {"foo", "50.000"}:  # added .lower() and changed match strings to lowercase
            print
        print line,   # added comma to prevent the automatic newline

使用多个if..else语句：

with open(input_file) as f:
    for line in f:
        if line.strip() == "Foo":
            print
        elif line.strip() == "50.000":
            print
        print line,   # added comma to prevent the automatic newline

插入具有特定文件值的换行符

1 个答案: