Manipulating Strings: Reversing Words in a Sentence

Introduction

Hello, and welcome! Are you ready to take your string manipulation skills in Python to the next level? Today, we'll explore a task that not only enhances your understanding of strings but also trains your ability to think creatively. The task at hand involves splitting a string into words, then reversing each word as if reflected in a mirror. Intrigued? Let's dive right in!

Task Statement and Description

Consider a string filled with words. Your task is to write a Python function that accepts such a string. It then takes each of those words, reverses their character order, and, finally, stitches them all together to form a new string with reversed words. Here's what you need to keep in mind: The input string will contain between 1 and 100 words. Each word is a sequence of characters separated by white space. A word is composed of characters ranging from a to z, A to Z, 0 to 9, or even an underscore_. The given string will not start or end with a space - double spaces will not appear either. After reversing the words, your program should return a single string with the words preserving their original order. Example Suppose that the input string is "Hello neat pythonistas_123" . The function will work on this in the following fashion:'Hello' becomes 'olleH''neat' becomes 'taen''pythonistas_123' becomes '321_satsinohtyp' The function now combines the obtained strings into one string, resulting in "olleH taen 321_satsinohtyp" . Therefore, if solution("Hello neat pythonistas_123") is called, the returned value should be "olleH taen 321_satsinohtyp" . Let's start breaking this down!

Step-by-Step Solution Building: Step 1

Our very first step requires us to separate the words in the sentence. Python provides us with a built-in split() function, which breaks a given string at a specified separator and outputs a list of words. If no argument is provided to the split() function, it defaults to using space as the separator. Here is a sample code to illustrate this: Python # an initial example string input_str = "Hello neat pythonistas_123" # split the string into words words = input_str.split() print(words) # an initial example string input_str = "Hello neat pythonistas_123" # split the string into words words = input_str.split() print(words) You will see ['Hello', 'neat', 'pythonistas_123'] printed out.

Step-by-Step Solution Building: Step 2

Join the 1M+ learners on CodeSignal

Be a part of our community of 1M+ users who develop and demonstrate their skills on CodeSignal

Python

# an initial example string
input_str = "Hello neat pythonistas_123"

# split the string into words
words = input_str.split()

print(words)

Python

# an example string
input_str = "Hello neat pythonistas_123"

# split the string into words
words = input_str.split()

# reverse each word 
reversed_words = [''.join(reversed(word)) for word in words]

print(reversed_words)

# an example string
input_str = "Hello neat pythonistas_123"

# split the string into words
words = input_str.split()

# reverse each word 
reversed_words = [''.join(reversed(word)) for word in words]

print(reversed_words)

Python

def solution(input_str):
    # split the string into words
    words = input_str.split()
    
    # reverse each word 
    reversed_words = [''.join(reversed(word)) for word in words]
    
    # join the words back together with space as a separator
    result = ' '.join(reversed_words)
    
    return result

# Now we call the function and print the returned result outside of the function
print(solution("Hello neat pythonistas_123"))  # this will print: 'olleH taen 321_satsinohtyp'

def solution(input_str):
    # split the string into words
    words = input_str.split()
    
    # reverse each word 
    reversed_words = [''.join(reversed(word)) for word in words]
    
    # join the words back together with space as a separator
    result = ' '.join(reversed_words)
    
    return result

# Now we call the function and print the returned result outside of the function
print(solution("Hello neat pythonistas_123"))  # this will print: 'olleH taen 321_satsinohtyp'

Python

# an example string
input_str = "Hello neat pythonistas_123"

# split the string into words
words = input_str.split()

# reverse each word 
reversed_words = [''.join(reversed(word)) for word in words]

print(reversed_words)

Python

def solution(input_str):
    # split the string into words
    words = input_str.split()
    
    # reverse each word 
    reversed_words = [''.join(reversed(word)) for word in words]
    
    # join the words back together with space as a separator
    result = ' '.join(reversed_words)
    
    return result

# Now we call the function and print the returned result outside of the function
print(solution("Hello neat pythonistas_123"))  # this will print: 'olleH taen 321_satsinohtyp'

Introduction

Task Statement and Description

Step-by-Step Solution Building: Step 1

Step-by-Step Solution Building: Step 2

Join the 1M+ learners on CodeSignal

Step-by-Step Solution Building: Step 3

Lesson Summary