Python join() method concatenate two or more strings.

>>> str = "python tutorial"
>>> str2 = "Perschon"
>>> str3 = " -- ".join((str,str2))
>>> str3

"python tutorial -- Perschon"

>>> str3 = "online"
>>> str4 = " -- ".join((str,str2,str3))
>>> str4

"python tutorial -- Perschon -- online"