python function starting with underscore
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In Python, functions and methods starting with an underscore (_) have a specific convention and meaning. These functions are often considered as "internal" or "private" and are intended for internal use within a module or a class. They are not meant to be accessed directly by users of the module or class. However, it's essential to understand their purpose and usage. In this tutorial, we'll explore Python functions starting with an underscore and provide code examples to illustrate their usage.
The single underscore is often used as a temporary or throwaway variable. It is commonly used as a placeholder when the variable itself is not needed or used.
In this example, the loop variable is not used within the loop block, so we use a single underscore to indicate that it's intentionally not being used.
Double underscores at the beginning of a method or attribute name are used for name mangling in classes. Name mangling is a mechanism to make an attribute or method more "private" within a class.
In this example, __private_variable is intended to be a private variable within the class, and its name is "mangled" to include the class name to avoid accidental name clashes.
Functions or methods with double underscores at both the beginning and end of their names are called "magic" methods or dunder methods. These methods have special meaning in Python and are used for operator overloading or to provide a specific behavior.
In this example, the _add_ method is defined to overload the addition operator (+) for instances of MySpecialClass.
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