Python’s built-in tuple() function creates and returns a new tuple object. When used without an argument, it returns an empty tuple. When used with the optional iterable argument, it initializes the new tuple with the elements in the iterable.
Read more about tuples in our full tutorial about Python Tuples.
Usage
Learn by example! Here are some examples of how to use the tuple() built-in function:
You can create an empty tuple by skipping the argument:
>>> tuple() ()
If you pass an iterable—such as a list, another tuple, a set, or a dictionary—you obtain a new tuple object with tuple elements obtained from the iterable:
>>> tuple((1, 2, 3)) (1, 2, 3)
Note that it really creates a new tuple object that may be different from the one passed as an argument. However, this is not always the case:
>>> x = (1, 2, 3) >>> y = tuple(x) >>> x is y True >>> x == y True
The new tuple y has the same elements as the original tuple x. But as tuples are immutable—they cannot be changes—they both point to the same object in memory: as you can see from the check x is y that returns True.
Video tuple()
Syntax tuple()
You can use the tuple() method with or without the optional iterable argument.
Syntax: There are two ways of using the constructor:
tuple() -> new empty tuple, you'll probably never need that
tuple(iterable) -> new tuple initialized with elements in iterableInteractive Shell Exercise: Understanding tuplw()
Consider the following interactive code:
Exercise: Guess the output before running the code.
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Summary
Python’s built-in tuple() function creates and returns a new tuple object.
- When used without an argument, it returns an empty tuple.
- When used with the optional
iterableargument, it initializes the new tuple with the elements in the iterable.
>>> tuple() () >>> tuple((1, 2, 3)) [1, 2, 3]
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