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Python - Check for spaces in string

Python – String Split including spaces

Last Updated : 11 Jan, 2025

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String splitting, including spaces refers to breaking a string into parts while keeping spaces as separate elements in the result.

Using regular expressions (Most Efficient)

re.split() function allows us to split a string based on a custom pattern. We can use it to split the string while capturing the spaces as separate elements.

Python

import re s = "Hello World Python" # Split the string including spaces res = re.split(r"(\s+)", s) print(res)

Output

['Hello', ' ', 'World', ' ', 'Python']

Explanation:

\s+ pattern matches one or more spaces.
By wrapping \s+ in parentheses, we ensure spaces are captured as separate elements.
This method is efficient and works well for strings with varying amounts of whitespace.

Let’s explore some more methods and see how we can split a string including spaces.

Table of Content

Using list comprehension with split()
Using a loop for custom splitting
Using itertools.chain() for advanced splitting

Using list comprehension with split()

This method uses Python’s split() function along with list comprehension to manually handle spaces.

Python

s = "Hello World Python" # Split the string and add spaces back as separate elements res = [part if part.strip() else " " for part in s.split(" ")] print(res)

Output

['Hello', 'World', 'Python']

Explanation:

split() function splits the string by spaces.
List comprehension ensures spaces are included in the final result.
This method is simple but less direct than using regular expressions.

Using for loop for custom splitting

We can manually iterate through the string to split it into words and spaces by using a simple for loop.

Python

s = "Hello World Python"  a = []  # List to store the result temp = ""  # Temporary variable to accumulate characters  for c in s:       if c != " ":  # If the character is not a space         temp += c  # Add character to current word     else:           a.append(temp)  # Add word to result         a.append(c)  # Add space as a separate element         temp = ""  # Reset temp for next word  if temp:  # Add the last word if exists     a.append(temp)  print(a)

Output

['Hello', ' ', 'World', ' ', 'Python']

Explanation:

This method uses a for loop to separate words and spaces.
Spaces are appended to the result list as separate elements.
While longer, this method gives us precise control over how the string is split.

Using itertools.chain() for advanced splitting

We can use itertools to split a string and include spaces with some advanced handling.

Python

from itertools import chain  s = "Hello World Python" res = list(chain.from_iterable((word, " ") for word in s.split(" "))) if res[-1] == " ":     res.pop()  # Remove trailing space print(res)

Output

['Hello', ' ', 'World', ' ', 'Python']

Explanation:

chain.from_iterable() function combines words and spaces into a single list.
This method is more advanced and less intuitive but can be useful in certain cases.

Python - Check for spaces in string

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Article Tags :

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Python string-programs

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