Python

Holidays, want to take a high-speed rail ticket, all have to 12306 to buy tickets, but used will find that it will be near the site also sieve out. But sometimes we don't even think about buying a nearby site. On the other hand, at the peak purchase,

In the http://chenx1242.blog.51cto.com/10430133/1884415 wrote a monitoring MQ script, the script into the crontab to monitor the time, so #crontab- e, To add a statement:* * * * * CD/directory && python MQ script name. PY >/root/mq.log 2>&1Send the

Markdownpad Document Errors are divided into two types of errors in the exception handler Syntax error: Unable to get past Python interpreter Logic error Exception handling what is exception handling The Python

Python has a more interesting built-in function-----zip, you can put the two sets of the incoming list to a combination of deformation, and then output the sub-element is a list of tuple, but the way of deformation is more abstract.As an example:a=[1

Text1. String: Universal string manipulation2. Re: Regular expression operation3. Difflib: Difference Calculation tool4. TextWrap: Text Fill5. Unicodedata:unicode Character Database6. Stringprep: Internet String Preparation Tool7. Readline:gnu read

We were able to create child processes using the subprocess packet. But this package has two very large limitations:1) We always let subprocess execute external programs instead of executing a function written inside a python script.2) The process

Recently installed in Ubuntu16.04 python3.5 and the system comes with the python2.7.13, summarize the different versions of the switching problem. Alias: Aliases BASHRC: Personal Profile First, modify the Python version (for

Just beginning to learn python for a week, master the basic knowledge of program development:1 variable assignment and reference2 Conditional control statements, such as if ... Else,for loops, while loops, etc.3 arrays, tuples, dictionaries basic

Simple geometric images typically include points, lines, matrices, circles, ellipses, polygons, and so on. First of all, recognize OpenCV's definition of pixel points.A pixel of an image has 1 or 3 values. Grayscale image has a gray value, the color

1, prepare the following east, and in order to install: Python 3.6 (64-bit) Django-1.11.tar.gzpycharm-community-2016.3.2.exe installed after the cmd run: python --version python -m django --version Confirm that the installation is

In mid-April 17, I signed up for the old boy Python Advanced automation Development Course in 51cto, which is a meaningful thing to record in learning (sense of self)First, the basic configuration and use of PycharmBefore self-study for a period of

Python Object-oriented programming (i)Although Python is an explanatory language, it is object-oriented and can be programmed with objects. Here's a look at how to program object programming in Python.I. How to define a classBefore you go into

This article mainly introduced the Python regular expression in the greedy/non-greedy characteristics of the relevant data, the text through the sample code introduced in a very detailed, for everyone has a certain reference value, the need for

This article mainly describes the Python Ganso (Tuple) and Dictionary (Dict) of the relevant information, the text through the sample code introduced in very detailed, I believe that we have a certain reference value, the need for friends to see

Python: simple example of counting the number of lines of code, and number of lines of python Python simple example of counting code lines When sending the test, we found that we needed to count the number of lines of code. So I wrote a small

Python descriptor (descriptor), pythondescriptor 1. What is a descriptor? The python descriptor is an object attribute of "binding behavior". In the descriptor protocol, it can override the access to the attribute through methods. These methods

Let's briefly talk about Tuple, Dict, and pythontuple in Python. Preface This article records some knowledge about Tuple and Dict in Python data types, as well as some built-in methods. I will not talk about it below. Let's take a look at the

Implementation principle of JSON Web Tokens, jsontokens Preface Recently, I was working on a transformation of a Python project and restructured the python project into a Java project. I encountered this knowledge point in the process and thought it

Python method to obtain the name of the currently running function instance code, python Function Python method for obtaining the name of the currently running function instance code Abstract: To obtain the source code name of a FUNCTION in c/c ++,

Python is a simple implementation of reading and writing json files, JSON (JavaScript Object Notation) is a lightweight data exchange format. It is based on a subset of ECMAScript. JSON uses a completely language-independent text format, but it also