Why does adding a trailing comma after a variable name make it a tuple?

Question

I want to know that why adding a trailing comma after a variable name (in this case a string) makes it a tuple. i.e.

>>> abc = \'mystr         


        

Answer 1

I was somewhat confused about the application of the comma, as you also apply a comma to make a list instead of tuple, but with a different variable assignment.

Hereby, a simple example that I made of how to create a tuple or a list.

abc = 1,2,3 # prints a tuple: (1, 2, 3)
*abc, = 1,2,3 # prints a list: [1, 2, 3]