Python program to concatenate all elements in a list into a string

List is one of the mutable data structures available in Python and is used to store data of any data type. It is represented by square brackets "[]", and all elements in the list are separated by commas. Indexing is applied when we want to access an element in the list.

In the same way, we have immutable string data structure and store data in string data type. The string is given in the form double quotes or single quotes. Indexing will be applied to access elements in the string.

Now, in this article, we will combine all the elements of the list into a string. There are several methods available in Python, let’s cover each one in detail.

Use join() method

join() method, it is a string method in Python. It takes an iterable object such as a list, tuple, etc. and concatenates all its elements into a string. We specify the delimiter " " to be used between each element during concatenation.

Example

In this example, we try to use the join() method to join the list of elements ['Hello', 'Welcome', 'to', 'Tutorialpoints'] into a string. The join() method takes a list of elements as an input parameter and returns the output of the join.

my_list = ['Hello', 'Welcome', 'to', 'Tutorialspoint']
result = ' '.join(my_list)
print("The concatenated output:",result)

Output

The concatenated output: Hello Welcome to Tutorialspoint

Use loop

In this method we iterate over each element in the list and concatenate them with the required separator space using = operator. We also add a space after each element to separate them. Finally, we use the strip() method to remove any leading or trailing spaces from the resulting string.

Example

my_list = ['Hello', 'Welcome', 'to', 'Tutorialspoint']
result = ''
for item in my_list:
   result += item + ' '
print("The concatenated output:",result.strip())

Output

The concatenated output: Hello Welcome to Tutorialspoint

Using list comprehension and join()

In this method we use list comprehension and write logic to iterate each element in the list and create a new list with the same elements. We then use the join() method to join all the elements in the new list into a string.

Example

my_list = ['Hello', 'Welcome', 'to', 'Tutorialspoint']
result = ' '.join([item for item in my_list])
print("The concatenated output:",result)

Output

The concatenated output: Hello Welcome to Tutorialspoint

Use the reduce() function in the functools module

In this approach, we use the reduce() function from the functools module, which allows us to apply a function cumulatively to an iterable of items. We use a lambda function to concatenate the current item with spaces and the previous result. reduce() Function applies this lambda function to all elements in the list, concatenating all elements into a string.

Example

my_list = ['Hello', 'Welcome', 'to', 'Tutorialspoint']
from functools import reduce
result = reduce(lambda x, y: x + ' ' + y, my_list)
print("The concatenated output:",result)

Output

The concatenated output: Hello Welcome to Tutorialspoint

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