Python字符串替换不工作的新行

Question

I have a keywords file I just wanted to replace the new lines with commas

print file("keywords.txt", "r").read().replace("\n", ", ")

tried all variations of \\r\\n

Answer 1

Don't forget, this is Python! Always look for the easy way...

', '.join(mystring.splitlines())

Answer 2

Your code should work as written. However, here's another way.

Let Python split the lines for you ( for line in f ). Use open instead of file . Use with so you don't need to close the file manually.

with open("keywords.txt", "r") as f:
    print ', '.join(line.rstrip() for line in f) # don't have to know line ending!

Answer 3

I just tried this and it works for me. What does your file look like?

My "temp.txt" file looked like this:

a
b
c
d
e

and my python file had this code:

print file("temp.txt", "r").read().replace("\n", ", ")

This was my output:

>python temp_read.py
a, b, c, d, e,

Answer 4

The code you wrote works for me in a test file I created.

Are you trying to write the results back to a file?

You could try looking at the input file in a hex editor to see the line endings.

Answer 5

Did you want to replace the actual file contents? Like this:

newContent = file("keywords.txt", "r").read().replace("\r", "").replace("\n", ", ")
open("keywords.txt", "w").write(newContent)