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This article mainly explains the "Python operator overload case analysis", the content of the article is simple and clear, easy to learn and understand, now please follow the editor's train of thought slowly in depth, together to study and learn "Python operator overload case analysis"!

I. Overview of operator overloading (1)

Operator overloading enables instance objects of a class to support various built-in operations of Python by implementing specific methods. For example: the + operator is the _ _ add__ function provided in the class, and when calling + to implement the addition operation, the _ _ add__ method is actually called.

The method explains when to call the method _ _ add__ addition Operand addition: subtraction Operand subtraction: Xmurydepartment x copyright mathematics subtraction _ multiplication Operand multiplication: xy,x=y__div__ division Operand division: xUnip, thecommple, subtraction, subtraction, subtraction, Sharding x [I], x [isetitem__ j], for loop without _ _ iter__, etc. _ _ setitem__ index assignment x [I] = sequence object _ _ delitem__ index and fragment deletion del x [I], del x [isetitem__ j] (II) addition operation overload character 1, Overview

The addition operation is overloaded by calling the _ _ add__ method, and the _ _ add__ method is automatically called when two instance objects perform the addition operation.

2. Case demonstration

Write programs-demonstrate addition operator overloading. Py

Run the program to view the results

If the two arrays are not equal in length, an exception will be thrown

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