Introduction to Python Programming (4) modules and packages

The Python language feature is very powerful, in addition to the class, there is the concept of modules and packages, which is a bit like Perl, here is a brief talk about packages and modules. First, the module in Python Module-is actually what we

Analysis of yield in Python

It is necessary to explain the iterator (iterator) and generator (constructor) in Python before introducing yield. One, iterator (iterator) In Python, A For loop can be used for any type in Python, including lists, Ganso, and so on, in fact, the

Two workarounds for Python implementation of global variables

The implementation of global variables for Python is described in this paper as follows: Let's take a look at the following test procedure: Count = 0def Fuc (count): Print count count + = 1for i in range (0, ten): Fuc (count) The operating

Introduction to the Python data structure tree and the two fork tree

I. Definition of a tree Tree structure is a kind of important nonlinear structure. A tree structure is a structure that has branching between nodes and has a hierarchical relationship. It is very similar to the tree in nature.Recursive definition

Python uses memory ZipFile object to package files in memory sample

The code is as follows: Import ZipFileImport Stringio Class Inmemoryzip (object):def __init__ (self):# Create the In-memory File-like objectSelf.in_memory_zip = Stringio.stringio () def append (self, filename_in_zip, file_contents):"Appends a file

Statistics and conversion Examples of binary tree of Python data structure

First, get the depth of the binary treeIs the final level of the binary tree, such as: Implementation code: The code is as follows: def getheight (self):"Get Binary Tree Depth"Return Self.__get_tree_height (Self.root)def __get_tree_height (self,

Using Python to implement the Fizzbuzzwhizz problem example on the hook online

Recently a lot of code to share this problem, the topic is to use object-oriented or functional programming, the following is a Python implementation example The code is as follows: #!/usr/bin/python#encoding: UTF8 '''The Game of

Python Logging Module Learning notes

module-level functions Logging.getlogger ([name]): Returns a Logger object that returns root if no name is specified loggerLogging.debug (), Logging.info (), logging.warning (), Logging.error (), logging.critical (): Set the log level for root

Getting started with the zero-learning Python (quad) operation

Python operators are similar to other languages (We only know the basic usage of these operators for the time being, so we could expand the content later, the advanced application is not introduced at the moment) Mathematical operations The code

Usage instance parsing of enumerate in Python

The usage of enumerate in Python is used to get counted in the For loop, and this article shows you the use of enumerate in Python as an instance. Specific as follows: The enumerate parameter is a variable that can be traversed, such as a string, a

Python implementation bubble, insert, select Sort Simple instance

The python implementation described in this article is bubbling, inserting, selecting a simple instance of sort for Python beginners to learn from the basics of data structures and algorithms, examples are simple to understand, the code is as

Example of a restart shutdown program implemented by Python

In this paper, the method of restarting shutdown program implemented by Python is described, which has some reference value for Python program design. Here's how: The instance code is as follows: #!/usr/bin/python#coding=utf-8import timefrom os

Python error: Attributeerror: ' Module ' object has no attribute ' s

Python's character set processing is really egg ache, currently use UTF-8 majority, then the default character set is ASCII, so we need to change to Utf-8 View current system Character set The code is as follows: Import SysPrint

An example of Python functional programming

Functional programming is the use of a series of functions to solve the problem, according to general programming thinking, the way we think about the problem is "how to do", and function-based programming thinking is what I want to "do." As for the

Pycharm Use (vii) some practical functions introduced

Real-time comparison Pycharm keeps track of the changes you make in a file by displaying a blue marker in the left column of the editor.This is very handy, and I've been using the command "Compare against HEAD" in Eclipse to compare changes before

Python3 Implementing a method to connect SQLite database

In this paper, the method of Python3 to connect SQLite database is described, which has a good reference value for Python learning. Share it for everyone's reference. Here's how: The instance code is as follows: Import sqlite3db = r

Python Learning Notes (i) (Basic introduction to environment construction)

Getting Started with Python This series for Python learning related notes collated, it people, more study harmless, more exploration, stimulate learning interest, pioneering thinking, do not ask tall, only to understand the fur, as the knowledge of

An example of a simple picture browser implemented using Wxpython

Last time I climbed n many pictures, but there was a problem when I browsed. The image browser is generally ranked by name, and my name for the image is incremented by number. For example, 3 will always be ranked behind 10, it will not be able to

Python writing method for detecting database SA users

This article describes a Python-written applet for a link to an injection point to detect if the current database user is SA, with detailed code such as the following: # Code by Zhaoxiaobu email:little.bu@hotmail.com #-*-coding:utf-8-*-from sys

Python iterator vs. builder instance

This article takes a detailed example of Python's iterators and generators, as follows: 1. Iterator Overview:Iterators are a way to access the elements of a collection. The iterator object is accessed from the first element of the collection until

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