Instance is an object that belongs to a class . For instance, list is a class in Python. When we create a list, we have an instance of the list class.
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The Python’s isinstance() function checks whether the object or variable is an instance of the specified class type or data type. For example, isinstance(name, str) checks if name is an instance of a class str .
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In Python, the built-in functions type() and isinstance() help you determine the type of an object.
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Checking if the item exists in the list. To check if the item exists in the list, use Python “in operator” . For example, we can use in operator with if condition, and if the item exists in the list, then condition returns True, and if not, then it returns false.
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An instance, in object-oriented programming (OOP), is a specific realization of any object . … In languages that create objects from classes, an object is an instantiation of a class. That is, it is a member of a given class that has specified values rather than variables.
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Class variables can only be assigned when a class has been defined. Instance variables, on the other hand, can be assigned or changed at any time . Both class variables and instance variables store a value in a program, just like any other Python variable.
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Instance − An individual object of a certain class . An object obj that belongs to a class Circle, for example, is an instance of the class Circle. Instantiation − The creation of an instance of a class. Method − A special kind of function that is defined in a class definition.
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