How to concatenate (join) items in a list to a single string

You can use the join() method to concatenate (join) items in a list to a single string in Python. The join() method takes one argument, which is the list of strings to be joined.

Here's an example:

words = ['this', 'is', 'a', 'sentence']
sentence = ' '.join(words)
print(sentence)

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You can also use join() to join a list of other types by converting them first to string.

numbers = [1, 2, 3, 4]
numbers_str = ' '.join(str(n) for n in numbers)
print(numbers_str)

In this example, the join() method takes a generator expression that converts each number in the list to a string, and then joins them with a space.