Removing newline character from string in Python

When working with text data, newline characters (\n) are often encountered especially when reading from files or handling multi-line strings. These characters can interfere with data processing and formatting. In this article, we will explore different methods to remove newline characters from strings in Python.

Using str.replace()

str.replace() method is the most simple and efficient way to remove all newline characters from a string. It replaces every occurrence \n with an empty string.

s = "Python\nWith\nGFG"
cleaned_text = s.replace("\n", "")
print(cleaned_text)  

PythonWithGFG

Explanation:

• Here replace() is used to replace \n with an empty string.
• It removes all newline characters in one operation.

Let's see some more methods to remove newline characters from string in Python.

Using str.splitlines() and str.join()

This method splits the string into a list of lines and then joins them back without newline characters.

a = "Python\nWith\nGFG"
cleaned_text = "".join(a.splitlines())
print(cleaned_text)  

PythonWithGFG

Explanation:

• splitlines() splits the string text into a list of lines.
• join() takes this list and concatenates its elements, adding no separator ("") between them.
• We get a single string without newline characters.

Using List Comprehension

List comprehension iterates through each character in the string, filtering out newline characters.

s = "Python\nWith\nGFG"
cleaned_text = "".join([char for char in s if char != "\n"])
print(cleaned_text)  

PythonWithGFG

Explanation:

• The list comprehension creates a new list containing all characters in text except \n.
• The join() method concatenates these characters into a single string.

Using Regular Expressions (re.sub())

Regular expressions allow us to find and replace patterns in text. The re.sub() function can match newline characters and remove them.

import re
s = "Python\nWith\nGFG"
cleaned_text = re.sub(r"\n", "", s)
print(cleaned_text) 

PythonWithGFG

Explanation:

• The re.sub() function looks for all matches of the pattern \n in text.
• It replaces each match with an empty string.
• The resulting string, cleaned_text, no longer contains newlines.