Explanation of the metod 'join'

Question

I got very confused with this so i left the python course for some days to study OOP in detail, i returned and i understand everything of this code except the 'join' method, it seems unique for clases but i dont now yet so.... what is exactly its function ?

class SpecialString:
def __init__(self, cont):
self.cont = cont

def __truediv__(self, other):
line = "=" * len(other.cont)
return "\n".join([self.cont, line, other.cont])

spam = SpecialString("spam")
hello = SpecialString("Hello world!")
print(spam / hello)

Answer 1

It is not class-specific, it is a Python builtin that joins the array (list, dictionary, tuple or whatever you call it in python) with a joiner character \n and returns one joined string out of the many pieces you joined.

"-".join(['a', 'b', 'c', 'd']) == "a-b-c-d"

Answer 2

Very thanks!!!!