operator in python function - PrivacyWall

https://realpython.com/python-in-operator/

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Python's "in" and "not in" Operators: Check for Membership

The in operator in Python is a membership operator used to check if a value is part of a collection. You can write not in in Python to check if a value is absent from a collection. Python’s membership operators work with several data types like lists, tuples, ranges, and dictionaries.

https://stackoverflow.com/questions/14379753/what-does-mean-in-py...

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mean in Python function definitions? - Stack Overflow

It's a function annotation. In more detail, Python 2.x has docstrings, which allow you to attach a metadata string to various types of object. This is amazingly handy, so Python 3 extends the feature by allowing you to attach metadata to functions describing their parameters and return values.

https://docs.python.org/3/library/operator.html

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operator — Standard operators as functions — Python 3.13.3 documentation

The operator module provides efficient functions that correspond to the intrinsic operators of Python, such as operator.add(x, y) for x+y. Learn how to use these functions for object comparisons, logical operations, mathematical operations, sequence operations, and more.

https://www.geeksforgeeks.org/python-membership-identity-operator...

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Python Membership and Identity Operators - GeeksforGeeks

Python offers two membership operators to check or validate the membership of a value. They are as follows: The in operator is used to check if a character/substring/element exists in a sequence or not. Evaluate to True if it finds the specified element in a sequence otherwise False.

https://note.nkmk.me/en/python-in-basic/

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The in Operator in Python (for List, String, Dictionary)

x in y returns True if x is included in y, and False otherwise. The in operator can be used not only with list, but also with other iterable objects such as tuple, set, and range. Details about dictionaries (dict) and strings (str) are described later. The in operator tests for value equality.

https://www.codewithc.com/exploring-the-functionality-of-in-in-py...

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Exploring the Functionality of ‘in’ in Python: Membership Operations

Ah, the humble ‘in’ operator, a tiny but mighty tool in the Python arsenal! This nifty operator is the key to checking the membership of an element in a sequence. Whether you’re dealing with lists, tuples, strings, or sets, ‘in’ has got your back! The syntax of ‘in’ operator is as simple as a wink .

https://www.askpython.com/python/examples/in-and-not-in-operators...

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Python “in” and “not in” Membership Operators: Examples and Usage

Python has many built-in operators to perform various operations, among them membership operators “in” and “not in” are used to check if something specific is present in iterable or not. Python uses these operators frequently to make search operations easier and more efficient.

https://www.geeksforgeeks.org/operator-functions-in-python-set-1/

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Operator Functions in Python | Set 1 - GeeksforGeeks

Python has predefined functions for many mathematical, logical, relational, bitwise etc operations under the module "operator". Some of the basic functions are covered in this article. 1. add (a, b) :- This function returns addition of the given arguments. Operation - a + b. 2. sub (a, b) :- This function returns difference of the given arguments.

https://stackoverflow.com/questions/2217001/override-pythons-in-o...

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Override Python's 'in' operator? - Stack Overflow

If I am creating my own class in Python, what function should I define so as to allow the use of the in operator, e.g. class MyClass (object): ... m = MyClass () if 54 in m: ... See also What.

https://stackoverflow.com/questions/6392739/what-does-the-at-symb...

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What does the “at” (@) symbol do in Python? - Stack Overflow

An @ symbol at the beginning of a line is used for class and function decorators: An @ in the middle of a line is probably matrix multiplication: @ as a binary operator. def __init__(self): self.toppings = [] def __call__(self, topping): # When using '@instance_of_pizza' before a function definition. # the function gets passed onto 'topping'.

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