python pubsub example

This article mainly introduces the Python regular expression replacement string function re. sub usage, combined with the instance form analysis of the regular expression replacement string function re. sub functions and simple use methods have some reference value. if you need sub functions, refer to the example in this article to describe Python regular express

Example Analysis of base64 encryption and decryption methods in python This document describes the base64 encryption and decryption methods in python. Share it with you for your reference. The specific analysis is as follows: I. base64 Base64 is a representation of binary data based on 64 printable characters. Because the power of 6 in 2 is equal to 64, every 6 b

Use the Python Bottle framework to write a simple service interface Example, pythonbottle Is there a scenario where a bunch of data is provided externally or a result is returned to the user. But I don't want to expose some internal data and logic to the other party... To put it simply, we want to provide an external interface as a service. There are many processing methods for this. RPC, what about buildin

to write to the file"" Defines writing data to the file function "" " forIinchrange (num): U=Ulist[i] with open ('D:/test.txt','a') as data:Print(U, file=data)if __name__=='__main__': List= [] # I previously put list=[] in the for loop of the Get_data () function, resulting in each loop emptying the list before appending the data, and finally traversing the last set of data ...URL='http://www.zuihaodaxue.com/shengyuanzhiliangpaiming2018.html'HTML=get_html (URL)Get_data (HTML, list)Write_data (

1. When the shell script executes the Python script, you need to use the return value of the Python script to determine the command to be executed by the following program Example: There are two py programs hello.py Copy Code code as follows: def main (): Print "Hello" If __name__== ' __main__ ':Main ()world.py def main ():Print "Hello"

The commonly used message digest algorithms are MD5 and SHA, which are available in both Python and go libraries, and are OK when called, which summarizes the implementation of Python and went. Example of a Python message digest The code is as follows: Copy Code code as follows: #! /usr/bin/

A simple example of the observer mode in the Python design mode. This article describes the observer mode of the Python design mode. We will share this with you for your reference. The details are as follows: The observer mode is a software design mode. A Topic object contains a series of observer dependent on it, which automatically notifies the observer of the

This example describes the Python callback function usage. Share to everyone for your reference. The specific analysis is as follows: First, the Baidu encyclopedia on the callback function explanation: A callback function is a function that is called through a function pointer. If you pass the pointer (address) of the function as an argument to another function, when the pointer is used to invoke the funct

This article describes how Python accesses the MySQL database. Share to everyone for your reference, as follows: First install the mysqldb that matches the Python version Example One Import Mysqldbconn=mysqldb.connect (user= ' root ', passwd= ' 123 ', db= ' example ') cur=conn.cursor () Cur.execute ("SELECT ID , Lastn

This article mainly introduces the Python operator overload usage. The example analyzes the Python Operator Overloading to implement addition operations. If you need it, refer to the following example to illustrate the Python operator overload usage. Share it with you for yo

This article mainly introduces the list initialization method in Python, analyzes the commonly used list initialization methods and related precautions, for more information about list initialization in Python, see the following article. This example describes the list initialization method in Python. We will share th

This article mainly introduces the example of implementing log analysis for apahce website using python. if you need it, you can refer to the example of maintaining the script. it is written in disorder, just as an example, demonstrate how to quickly use the tool to quickly achieve the goal: Application: shell and

Example of pass statement usage in python This article mainly introduces the usage of pass statements in python, compares the usage of pass statements in C ++ program examples, and provides some reference value. For more information, see This example describes the usage of pass statements in

Python function decorator usage example This document describes how to use the python function decorator. Share it with you for your reference. The details are as follows: The decorator is often used in scenarios with cut-plane requirements. More typical scenarios include log insertion, performance testing, and transaction processing. The decorator is an excellen

Example of using MongoDB in Python Web framework Pylons This article describes how to use MongoDB in Python Web framework Pylons. Python 1.0 was released after a long development. For formal product development, version 1.0 is of great significance, which indicates that the Pylons API has finally stabilized. Although

Python scientific computing package numpy usage example details, pythonnumpy This article describes how to use the Python scientific computation package numpy. We will share this with you for your reference. The details are as follows: 1. Data Structure Numpy uses a matrix data structure similar to Matlab called ndarray to manage data, which is more powerful than

Example of how to use the sets module in python: pythonsets The examples in this article briefly describe how to use the sets module in python and share it with you for your reference. The specific method is as follows: Import sets magic_chars = sets. Set ('Abracadabra ') print magic_chars poping_chars = sets. Set ('others') print poping_chars print "". join (

This article mainly introduces the usage of the random function random in python. The example analyzes the usage skills of the random function, which is very useful, for more information about how to use the random function random in python, see the following example. Share it with you for your reference. The details a

Python uploads files to Baidu cloud (for example ), Environment preparation Python3.6 PyCharm 2017.1.3 Windows Environment Framework Construction Selenium3.6 Installation Method: Pip install selenium Steps: 1. Step Analysis 1. Select "account and password Logon" 2. Enter the user name and password, and log on 3. File Upload Note: This article describes how to use the webdriver In the selenium package to loa

Selenium is a tool that allows the browser to automate a series of tasks, often used for automated testing. However, it can also be used to give Web pages. Currently, it supports four client languages for Java, C #, Ruby, and Python. If you use Python, you only need to enter "sudo easy_install selenium" on the command line and return to install Selenium's Python