What is NamedTuple used for?

What is NamedTuple used for?

Python’s namedtuple() is a factory function available in collections . It allows you to create tuple subclasses with named fields. You can access the values in a given named tuple using the dot notation and the field names, like in obj. attr .

What are the three types of docstrings?

Docstrings can be further broken up into three major categories: Class Docstrings: Class and class methods. Package and Module Docstrings: Package, modules, and functions. Script Docstrings: Script and functions.

What does calling a NamedTuple?

The NamedTuple is another class, under the collections module. Like the dictionary type objects, it contains keys and that are mapped to some values. In this case we can access the elements using keys and indexes. To use it at first we need to import it the collections standard library module.

What are docstrings used for?

A Python docstring is a string used to document a Python module, class, function or method, so programmers can understand what it does without having to read the details of the implementation. Also, it is a common practice to generate online (html) documentation automatically from docstrings.

How do you inherit from Namedtuple?

Inheritance for Python Namedtuples

  1. from collections import namedtuple Point = namedtuple(‘Point’, (‘x’, ‘y’)) p = Point(1, 2) print(p.
  2. from typing import NamedTuple class Point(NamedTuple): x: int y: int = 0 p = Point(1) print(p.

Is a Namedtuple a class?

And it’s not a class at all. We can avoid these problems using Named Tuple. Named Tuple allows us to give names to the elements, so we can access the attributes by both attribute name and its index. There are actually two types of Named Tuple in Python3.

What are Numpy docstrings?

A documentation string (docstring) is a string that describes a module, function, class, or method definition. The docstring is a special attribute of the object ( object. __doc__ ) and, for consistency, is surrounded by triple double quotes, i.e.: “””This is the form of a docstring.

What’s the difference between comments and docstrings?

A quick recap on comments vs docstrings: Use comments to explain how code works. Comments are great for leaving notes for people working on your program. Docstrings provide documentation about functions, classes, and modules. Use docstrings to teach other developers how to use your program.

What should a docstring include?

What Is a Docstring?

  1. All modules, classes, methods, and functions, including the __init__ constructor in packages should have docstrings.
  2. Descriptions are capitalized and have end-of-sentence punctuation.
  3. Always use “””Triple double quotes.””” around docstrings.
  4. Docstrings are not followed by a blank line.

Can Namedtuple have methods?

Python provides several helper methods for a namedtuple. The _fields is a tuple of strings listing the field names. The _field_defaults is a dictionary mapping field names to default values. The _asdict method returns a new ordered dictionary, which maps field names to their corresponding values.

What should be in a Docstring?

The docstrings for Python Modules should list all the available classes, functions, objects and exceptions that are imported when the module is imported. They should also have a one-line summary for each item.

How do I create a Docstring in Pycharm?

Press Ctrl+Alt+S and go to Editor | General |Smart Keys. Select the Insert type placeholders checkbox in the Smart Keys page of the editor settings. Place the caret at the function name, and press Alt+Enter . In the list of intention actions that opens, choose Insert documentation string stub.

How do I customize a namedtuple’s docstrings?

The Python3 documentation for namedtuple shows that a namedtuple’s docstrings can be customized by appending your own strings to the __doc__ fields. For your question, you could write: Sessions = namedtuple (‘Sessions’, [‘cass’, ‘solr’, ‘mysql’]) Sessions.__doc__ += ‘: All database sessions.’

How to access a namedtuple in Python?

1. Access by index : The attribute values of namedtuple() are ordered and can be accessed using the index number unlike dictionaries which are not accessible by index. 2. Access by keyname : Access by keyname is also allowed as in dictionaries. 3. using getattr() :- This is yet another way to access…

Do I need a wrapper class for a docstring?

No need to use a wrapper class as suggested by the accepted answer. Simply literally add a docstring: This results in: (example using ipython3 ):

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