Replace \n with <br /> [duplicate]

This question already has answers here: Why doesn't calling a string method (such as .replace) modify (mutate) the string? Why doesn't it change unless I assign the result? 开发者_Go百科 (3 answers) Closed 6 months ago.

I'm parsing text from a file with Python. I have to replace all newlines with <br />. I tried this code:

thatLine.replace('\n', '<br />')
print thatLine

But I still see the text with newline after it. Why?

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thatLine = thatLine.replace('\n', '<br />')

str.replace() returns a copy of the string, it doesn't modify the string you pass in.

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Just for kicks, you could also do

mytext = "<br />".join(mytext.split("\n"))

to replace all newlines in a string with <br />.

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For some reason using python3 I had to escape the "\"-sign

somestring.replace('\\n', '')

Hope this helps someone else!

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To handle many newline delimiters, including character combinations like \r\n, use splitlines (see this related post) use the following:

'<br />'.join(thatLine.splitlines())

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thatLine = thatLine.replace('\n', '<br />')

Strings in Python are immutable. You might need to recreate it with the assignment operator.

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You could also have problems if the string has <, > or & chars in it, etc. Pass it to cgi.escape() to deal with those.

http://docs.python.org/library/cgi.html?highlight=cgi#cgi.escape

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The Problem is When you denote '\n' in the replace() call , '\n' is treated as a String length=4 made out of ' \ n '
To get rid of this, use ascii notation. http://www.asciitable.com/

example:

newLine = chr(10)
thatLine=thatLine.replace(newLine , '<br />')

print(thatLine) #python3

print thatLine #python2 .

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I know this is an old thread but I tried the suggested answers and unfortunately simply replacing line breaks with <br /> didn't do what I needed it to. It simply rendered them literally as text.

One solution would have been to disable autoescape like this: {% autoescape false %}{{ mystring }}{% endautoescape %} and this works fine but this is no good if you have user-provided content. So this was also not a solution for me.

So this is what I used:

In Python:

newvar = mystring.split('\n')

And then, passing newvar into my Jinja template:

{% for line in newvar %}
    <br />{{ line }}
{% endfor %}

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If in case you are trying to replace the /n of a string to </br>, i am speculating that you want to parse line break in HTML view.

word-break: break-all,
white-space: pre-wrap;

Adding these to styles to parent div/container of the text will solve your problem without any string manipulations.

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If you are wanting to do this using replace, and the
is not working for you (as was the case for me), you can use the following:

text_to_split = r'Hello\n\n I am a test.'
split_text = text_to_split.replace('\\n', '\n')

You first escape the \ in the sample text, and then by not escaping in the replacement text, it will generate a new line.