Python: Prevent Fileinput From Adding Newline Characters

I am using a Python script to find and replace certain strings in text files of a given directory. I am using the fileinput module to ease the find-and-replace operation, i.e., the

Solution 1:

Your newlines are coming from the print function

use:

import sys

sys.stdout.write ('some stuff')

and your line breaks will go away

Solution 2:

Use

print line,

or

file.write(line)

to fix extra newlines.

As of [Ctrl]-[M] - that is probably caused by input files in DOS encoding.

Solution 3:

Instead of this:

print line  # Put back line into file

use this:

print line,  # Put back line into file

Solution 4:

Change the first line in your for loop to:

line = line.rstrip().replace("findStr", "replaceStr")

Solution 5:

Due to every iteration print statement ends with newline, you are getting blank line between lines.

To overcome this problem, you can use strip along with print.

import fileinput
def fixFile(fileName):
  for line in fileinput.FileInput(fileName, inplace=1):
    line = line.replace("findStr", "replaceStr")
    print line.strip()

Now, you can see blank lines are striped.