How to Remove Whitespace from a String in Python?

Trimming Whitespace in Python

Question: How can whitespace (spaces and tabs) be removed from a string in Python?

Answer:

There are several methods available in Python for trimming whitespace from strings:

1. str.strip()

The str.strip() method removes whitespace from both the left and right sides of a string. For example:

<code class="python">s = "  \t a string example\t  "
s = s.strip()
print(s)  # Output: "a string example"</code>

2. str.rstrip()

The str.rstrip() method removes whitespace only from the right side of a string:

<code class="python">s = s.rstrip()
print(s)  # Output: "a string example"</code>

3. str.lstrip()

The str.lstrip() method removes whitespace only from the left side of a string:

<code class="python">s = s.lstrip()
print(s)  # Output: "a string example  "</code>

4. str.strip(chars)

You can also specify a specific set of characters to strip using the str.strip(chars) method:

<code class="python">s = s.strip(' \t\n\r')
print(s)  # Output: "astringexample"</code>

This will remove any space, t, n, or r characters from both sides of the string.

5. re.sub

Additionally, you can use the regular expression module (re) to remove whitespace from a string:

<code class="python">import re
print(re.sub('[\s+]', '', s))  # Output: "astringexample"</code>

This regular expression will substitute any amount of whitespace with an empty string, effectively trimming the whitespace.

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