Python program to split a string and join with comma

Sometimes we need to split a string into individual words and then join them back together with commas instead of spaces. Python provides simple built-in methods to accomplish this task efficiently.

So, if the input is like s = "Programming Python Language Easy Funny", then the output will be Programming, Python, Language, Easy, Funny

Algorithm

To solve this, we will follow these steps −

• words − Create a list of words by applying split() function on the string with delimiter " " (space)

• result − Join each item present in words and place ", " in between each pair of words using join()

• Return the result

Example

Let us see the following implementation to get better understanding −

def solve(s):
    words = s.split(' ')
    result = ', '.join(words)
    return result

s = "Programming Python Language Easy Funny"
print(solve(s))

The output of the above code is −

Programming, Python, Language, Easy, Funny

Using Default split()

We can also use split() without any parameter, which splits on any whitespace −

def solve_default(s):
    words = s.split()  # splits on any whitespace
    result = ', '.join(words)
    return result

s = "Programming Python Language Easy Funny"
print(solve_default(s))

Programming, Python, Language, Easy, Funny

One-Line Solution

For a more concise approach, we can combine both operations in a single line −

s = "Programming Python Language Easy Funny"
result = ', '.join(s.split())
print(result)

Programming, Python, Language, Easy, Funny

How It Works

The split() method breaks the string at each space character and returns a list of words. The join() method then concatenates all elements in the list using the specified separator (", " in our case).

Conclusion

Use split() to break strings into words and join() to combine them with custom separators. The one-line approach ', '.join(s.split()) is the most Pythonic solution for this task.