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I have a sequence file begining with > and afterwards a lot of letters followed by newlines and then again >. I am able to extract the line begining with > and the letter lines in to two different variables, when there are no newlines, but I does not work if there are any newlines. My question is, how can I, in my script, remove these newlines?

GIZ
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3 Answers3

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Your question's pretty unclear, but if you simply need to remove all newlines, use str.replace (replace("\n", ""))

Daniel
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If you have a string 'blah' containing newlines:

# Replaces all newline characters with nothing
blah = blah.replace("\n", "")

PS: Once you have found an answer which works for you, click the tick next to the answer to 'accept' it (helping others with your problem know which solution works).

Adi219
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Depends on exactly what you're trying to do.

You can always replace any sequence in a string by using replace. In this case you'd do something like 

foo.replace("\n", "")

If you're just trying to remove the newline from the end of a bunch of lines, you're better off using strip.

foo.strip()

What you probably want to do is this:

with open(file_path, "r") as fh:
    lines = [line.strip() for line in fh.readlines()[1:-1]]

That will open the file, then read each line (without the newline) into the variable lines, and ignore the first and last lines.

Batman
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  • I do it like: file = open('somefile', 'r') for line in file: line = line.rstrip() I have also tried with replace, but they do not work for me. I still have problems. –  Aug 12 '17 at 13:35