python class constants

Python class inheritance Some basic concepts of the Python class In Python, everything is an object. The process of declaring variable functions is actually the connection to the space allocated for objects in the memory. Similar to Java and C ++,

__str__ and __repr__If you want to turn an instance of a class into str, you need to implement a special method __str__ ():class Person (object): __init__(self, Name, gender): self.name = name Self.gender = Gender def __str__(self): return ' (Person:%s,%s) '% (Self.name, self.gender) Now try print on the interactive command line:>>> p = person (' Bob ', ' Male ') >>> print P (pe

This article mainly introduces detailed information about the inheritance instances of the python class. For more information about the inheritance instances of the python class, see the following article, for more information, see Python

and change the static fields of a class, they do not have a money field in their own memory, so they go through the class pointers to the class memory, but when they are found, will open up a space in your own memory space to store the modified results for this static field. Therefore, the static fields in the class a

http://blog.csdn.net/pipisorry/article/details/49516185In the design of face object, class method and static method are the two terms commonly used.Logically: A class method can only be called by a class name, and a static method may be called by a class name or object name.In C + +, a static method is logically equiva

There are only new classes in Python 3, no legacy classes, no designations to display, classes you define are new classes If you don't know the difference between the new class and the old one, then you don't have to know. Defined: >>> class Nothing: #定义方法和属性 pass >>> The class inside defines the method wi

','Jxz') My.exsql ('select * from Stu;')Print('I am the last line of code')In the constructor, make the database connection, do the exception processing, execute the SQL statement in the executing SQL statement function, the operation of the destructor closes the cursor and the database connection.In connection with the database, there is a new knowledge point: autocommit=true auto-commit, which was not mentioned in the previous database connection use, instead of the need to determine whether t

Class Definition, inheritance, and object instance usage in Python This article mainly introduces the definition, inheritance, and usage objects of classes in Python. It analyzes the related concepts and usage skills of classes in Python in detail and has some reference value, for more information, see This document de

The last time I wrote a blog about Python, now look back and find a lot of grammar or low-level, the expression is not very clear. Now let's talk about a new understanding of the expression of the Python class.The focus of this blog is to introduce some of the common programming patterns associated with class definitions, mainly including enabling objects to supp