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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.
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Python's "in" and "not in" Operators: Check for Membership
Python’s in and not in operators allow you to quickly check if a given value is or isn’t part of a collection of values. This type of check is generally known as a membership test in Python. Therefore, these operators are known as membership operators. By the end of this tutorial, you’ll understand that:
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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.
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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.
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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.
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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.
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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 .
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Using ‘in’ with Python | Membership Operators Guide
TL;DR: How Do I Use the ‘in’ Operator in Python? The 'in' operator in Python is used to check if a value exists in a sequence like a list, tuple, or string. EX: print(1 in list) prints True if the value 1 is found in list, and False otherwise. Here’s a simple example:
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Python Operators: Arithmetic, Assignment, Comparison, Logical, Identity ...
Operators are special symbols that perform some operation on operands and returns the result. For example, 5 + 6 is an expression where + is an operator that performs arithmetic add operation on numeric left operand 5 and the right side operand 6 and returns a sum of two operands as a result.
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10.3. operator — Standard operators as functions - Python 3.7 Documentation
The operator module exports a set of efficient functions corresponding to the intrinsic operators of Python. For example, operator.add(x, y) is equivalent to the expression x+y. Many function names are those used for special methods, without the double underscores.