Python逗号分隔文本文件

Question

I am learning python at the moment and I have a text file with lots of numbers separated by a newline (\\n) like:

5 100 7 83

What's the easiest way to read/write into a new text file putting the numbers into a comma delimited format like:

5, 100, 7, 83

Answer 1

看一下csv模块 ，该模块旨在读取和写入此类格式。

Answer 2

For each line in the file, you want to split it apart on spaces and rejoin it with commas:

with open('infile.txt') as infile, open('outfile.txt', 'w') as outfile:
    outfile.write(', '.join(infile.read().split('\n')) + '\n')

You could also look at the csv module, if you want to do anything more complicated.

Answer 3

The very simplest way, especially if the file is not very big

with open('infile.txt') as infile, open('outfile.txt', 'w') as outfile:
    outfile.write(infile.read().replace(" ", ", "))

csv module is overkill if you are just dealing with numbers that don't need special treatment or escaping

If the file is too large to read into memory at once, use something like Abe's answer