Defining a NamedTuple
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A namedtuple is an object type that is:
- Easy-to-create
- Lightweight
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A namedtuple is a collection that has the following properties:
- Can be ordered
- Is indexed
- Is immutable
- Allows duplicates
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Named tuples can be referenced using:
- Object-like variable dereferencing
- Standard tuple syntax
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The use-cases include the following:
- Improve code readability by using object notation
- Can replace immutable classes without functions
Example of Use-Case 1
>>> # Normal tuple
>>> pt1 = (1.0, 5.0)
>>> pt2 = (2.5, 1.5)
>>> line = pt1[0]-pt2[0]
>>> # Named tuple
>>> from collections import namedtuple
>>> Point = namedtuple('Point', 'x y')
>>> pt1 = Point(1.0, 5.0)
>>> pt2 = Point(2.5, 1.5)
>>> line = pt1.x-pt2.xExample of Use-Case 2
>>> # Replaceable class
>>> class Gender:
... def __init__(self, male, female):
... self.male = male
... self.female = female
>>> genders = Gender(male, female)
>>> # Named tuple
>>> from collections import namedtuple
>>> Gender = namedtuple('Gender', ['male', 'female'])
>>> genders = Gender(male, female)References
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