附加额外的数据到一个文件-python

Question

我很难试图附加额外的数据到文件。 重复索引数的2倍，并添加22和23，留下的电话号码 对现有线20 例如

原始

MYFILE：

1,20,323.454.1234, 
2,20,212.333.3333, 
3,20,212.222.4444, 
4,20,850.234.3881, 
5,20,850.111.3881, 
6,20,510-222-5241, 
7,20,510-343-5241, 
8,20,678-456-3555, 
9,20,678-123-3555, 
10,20,123-123-4878, 

假设新的文件，以这样 mynewfile：

1,20,323.454.1234, 
1,22,323.454.1234, 
1,23,323.454.1234, 
2,20,212.333.3333, 
2,22,212.333.3333, 
2,23,212.333.3333, 
3,20,212.222.4444, 
3,22,212.222.4444, 
3,23,212.222.4444, 
4,20,850.234.3881, 
4,22,850.234.3881, 
4,23,850.234.3881, 
5,20,850.111.3881, 
5,22,850.111.3881, 
5,23,850.111.3881, 
6,20,510-222-5241, 
6,22,510-222-5241, 
6,23,510-222-5241, 
7,20,510-343-5241, 
7,22,510-343-5241, 
7,23,510-343-5241, 
8,20,678-456-3555, 
8,22,678-456-3555, 
8,23,678-456-3555, 
9,20,678-123-3555, 
9,22,678-123-3555, 
9,23,678-123-3555, 
10,20,123-123-4878, 
10,22,123-123-4878, 
10,20,123-123-4878, 

我的代码：

#!/usr/bin/python 

import re 

myfile = open('myfile', 'r+') 
lines = myfile.readlines() 
sentences = [] 
for line in lines: 
     if line: 
      sentences.insert(line + '22') 
    for line in lines: 
     if line: 
      sentences.insert(line + '23') 
myfile.close() 



outputfile = open('mynewfile', 'w+') 
if len(sentences) > 0: 
    for sentence in sentences: 
     outputfile.write(sentence) 

outputfile.close() 

任何帮助将不胜感激。

Answer 1

只是一些提示，所以你可以自己想出解决方案。 您可以逐行读取输入文件。使用类似：

with open("myfile", "rt") as f, open ("mynewfile", "wt") as g: 
    for line in f: 
    # split line and generate your two new lines 
    print >> g, line 
    print >> g, ... # new line 1 
    print >> g, ... # new line 2 

你需要拆分件中的每一行，使用split了点。

Answer 2

方式一：

import fileinput 

with fileinput.input() as f: 
    for line in f: 
     print(line, end='') 
     fields = line.split(r',', 2) 
     for n in [22, 23]: 
      fields[1] = n 
      print(','.join(map(str, fields)), end='') 

它产生：

1,20,323.454.1234, 
1,22,323.454.1234, 
1,23,323.454.1234, 
2,20,212.333.3333, 
2,22,212.333.3333, 
2,23,212.333.3333, 
3,20,212.222.4444, 
3,22,212.222.4444, 
3,23,212.222.4444, 
4,20,850.234.3881, 
4,22,850.234.3881, 
4,23,850.234.3881, 
5,20,850.111.3881, 
5,22,850.111.3881, 
5,23,850.111.3881, 
6,20,510-222-5241, 
6,22,510-222-5241, 
6,23,510-222-5241, 
7,20,510-343-5241, 
7,22,510-343-5241, 
7,23,510-343-5241, 
8,20,678-456-3555, 
8,22,678-456-3555, 
8,23,678-456-3555, 
9,20,678-123-3555, 
9,22,678-123-3555, 
9,23,678-123-3555, 
10,20,123-123-4878, 
10,22,123-123-4878, 
10,23,123-123-4878, 

Answer 3

for x in open('myfile.txt'): 
    x = x.rstrip() 
    L = x.split(',') 
    print(x) 
    print(L[0], 22, L[2], "\n", sep=',', end='') 
    print(L[0], 23, L[2], "\n", sep=',', end='')