python获取索引值并写入文本

Question

我有一个文本文件，我需要获取第一个＆＃39;数字＆＃39;的索引值。找到并插入no.s

文字档案：

!Hello World!
   the following no.s
     Number 1
     Number 2
     Number 3

我需要在第一个之后插入一组no.s。那是Number 1

代码由一组no.s

组成

f.write( '\n'.join(group.text) + '\n')

预期输出！

!Hello World!
   the following no.s
     Number 1
        12345
        12342
        234567   
     Number 2
     Number 3     

Answer 1

这将添加行，你希望你能想出的填充

text = ["123456","12342","234567"]
with open("indput.txt") as f,open("output.txt","w") as out:
    lines = f.readlines()
    print lines
    for ind,line in enumerate(lines):
        if line.strip().startswith("Number"):
            lines[ind] = (line+"     "+'\n     '.join(text) + '\n')
            break
    for line in lines:
        out.write(line)