Concatenate items in a list into a Python string

This post will discuss how to concatenate items present in a Python list into a string separated by a delimiter.

1. Using `join()` function

To efficiently concatenate items in the list with a preferred delimiter, the recommended solution is to call the join() function on the delimiter, i.e., delim.join(list).

if __name__ == '__main__':

l = ['Python', '3.7']

s = ' '.join(l)

print(s) # prints "Python 3.7"

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2. Using `reduce()` function

Another plausible way to construct a string out of a list is to reduce with a custom function. Here’s a working example:

from functools import reduce

def concat(x, y):

return x + ' ' + y

if __name__ == '__main__':

l = ['Python', '3.7']

s = reduce(concat, l)

print(s) # prints "Python 3.7"

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Here’s another variation that uses lambda expression.

from functools import reduce

if __name__ == '__main__':

l = ['Python', '3.7']

s = reduce(lambda x, y: x + ' ' + y, l)

print(s) # prints "Python 3.7"

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That’s all about concatenating items in the list into a string in Python.

Concatenate items in a list into a Python string

1. Using join() function

2. Using reduce() function

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1. Using `join()` function

2. Using `reduce()` function