Why is tuple() listed as a way of creating a tuple. Isn't the = sign necessary? e.g tuple = (1,2,3)

Good question! In the twoples quiz, it asks:

Quiz Question _n_ of 5

What creates a tuple?
Choose the correct answer below:

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A   tuple()
B   A comma between two bits of data
C   ( )

The are some semantic points to clarify first.

A tuple is an object type. Specifically, a immutable container, that is, the container or collection of objects can not change once created. Though if one of the objects in the container is a mutable object, that object's contents may change.

Creating a tuple is not the same as assigning a reference to the created tuple. This reference assignment is done using an equal sign.

Thought not always necessary, using the class constructor tuple() will explicitly create a tuple in the same fashion the constructor list() can be used to create a list.

tuples are created all the time by simply using a comma. For example, look at the statement

b, a = 1, 2

An assignment using equal can only assign one object to one reference. The single object on the left "b, a" is a tuple with two references "a" and "b". The left side tuple is expecting to receive two values from the right side of the equation. The right side is also a tuple consisting of two int values.

The constructor tuple() can be used to create a new immutable object from a mutable one:

a_list = [1, 2, 3]
a_tuple = tuple(a_list)

Post back if you need more help. Good luck!!!