python – How to concatenate items in a list to a single string?

>>> sentence = [this, is, a, sentence]
>>> -.join(sentence)
this-is-a-sentence
>>>  .join(sentence)
this is a sentence

A more generic way to convert python lists to strings would be:

>>> my_lst = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> my_lst_str = .join(map(str, my_lst))
>>> print(my_lst_str)
12345678910

Its very useful for beginners to know
why join is a string method.

Its very strange at the beginning, but very useful after this.

The result of join is always a string, but the object to be joined can be of many types (generators, list, tuples, etc).

.join is faster because it allocates memory only once. Better than classical concatenation (see, extended explanation).

Once you learn it, its very comfortable and you can do tricks like this to add parentheses.

>>> ,.join(12345).join(((,)))
Out:
(1,2,3,4,5)

>>> list = [(,)]
>>> ,.join(12345).join(list)
Out:
(1,2,3,4,5)