Question

When you run something through popen in Python, the results come in from the buffer with the CR-LF decimal value of a carriage return (13) at the end of each line. How do you remove this from a Python string?

Answer 1

You can simply do

s = s.replace( 
 ,  
 )

to replace all occurrences of CRNL with just NL, which seems to be what you want.

Answer 2

buffer = "<text from your subprocess here>
"
no_cr = buffer.replace("
", "
")

Answer 3

If they are at the end of the string(s), I would suggest to use:

buffer = "<text from your subprocess here>
"
no_cr = buffer.rstrip("
")

You can also use rstrip() without parameters which will remove whitespace as well.

Answer 4

replace( , ) should work, but sometimes it just does not. How strange. Instead you can use this:

lines = buffer.split( 
 )
cleanbuffer =   
for line in lines: cleanbuffer = cleanbuffer + line

Answer 5

Actually, you can simply do the following:

s = s.strip()

This will remove any extraneous whitespace, including CR and LFs, leading or trailing the string.

s = s.rstrip()

Does the same, but only trailing the string.

That is:

s =    Now is the time for all good...  	

   "
s = s.strip()

s now contains Now is the time for all good...

s = s.rstrip()

s now contains Now is the time for all good...

See http://docs.python.org/library/stdtypes.html for more.

Answer 6

You can do s = s.replace( , ) too.

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