c basics

from apscheduler.scheduler import Scheduler import datetime # Start the scheduler sched = Scheduler() def job_function(): print "Hello World" , ‘start job1 at: ‘, datetime.datetime.now() def job_f(): print "Hello World" , ‘start job2 at: ‘, datetime.datetime.now() print ‘start to sleep‘ print ‘wake‘ print datetime.datetime.now() sched daemonic = false sched add_cron_job ( job_function day _of_week

Tags: summary MSSQL database by dayThe format of the database is as follows, which is a list of records that require a daily summary of the schedule for the reverse output. The following SQL statement can be used to summarize by day and can be paged out DECLARE @Days TABLE (datetime) DECLARE @StartDate datetime= ' 2014-04-05 14:22:20 '--Summary start date DECLARE @EndDate dat Etime= ' 2015-04-08 15:21:33 '--Summary end date DECLARE @start DATETIME DECLARE @E2_UserName varchar = ' CN000001 '-use

statementExecute the flush privileges and then createmysql> flush Privileges;And then authorize, be sure to authorizeMysql> GRANT All privileges on * * to ' root ' @ ' localhost '; Query OK, 0 rows Affected (0.00 sec) mysql> flush privileges; You can exit the Back to the end of the terminal #servicemysqldstart#mysql-uroot- pwelcomewelcometothemysqlmonitor.commandsendwith; or\g.yourmysqlconnectionidis1serverversion:5.5.36-log sourcedistributioncopyright (c) 2000,2014,Oracleand/orits Affiliat

displayed through globals and locals# Globals and locals # Globals and locals are called built-in functions a = 1 b = 2 defFun (c,d):E= 111 Print ("locals={0}". Format (Locals ()))Print ("globals={0}". Format (Globals ()))Fun100, 200) Eval () function Executes a string as an expression, returning the result of the execution of the expressionEval (string_code, globals = none, locals = none) EXEC () functionSimilar to the Eval function, but does not return resultsEXEC (String_c

to another θ (1) function, and the sum is a linear function of N, that is , Θ (n), which is added to 2T (N/2) from the "Resolution" step. , recursion for the worst-case run time t (n) of the merge sort will be given Θ (1) if N=1 T (n) ={2T (N/2) +Θ (n) if n>1 in the 4th chapter, we will see the "Main theorem", which can be used to prove that T (N) is θ (NLGN), where LGN stands for ㏒2n, because the logarithmic function grows slower than any linear function, so the input large enough to run in

hover event (moving the mouse over an object and moving out of the object). This is a custom method that provides a "keep in" state for frequently used tasks.Over: The mouse moves to the function to be triggered on the elementOut: The mouse moves out of the element to trigger the function"en">"UTF-8"> class="Test">View Code4.2 Property Operations--------------------------CSS Class $ (""). AddClass (class|FN) $ (""). Removeclass ([class|fn])--------------------------Properties $ (""). attr (); $

law is to divide the problem of a large scale into small-scale problems that are independent and identical to the original problem.Its algorithm design pattern is as follows:Divide-and-conquer (P) { if (| p| This one| p| Indicates the size of the problem p,N0 is a threshold value, indicating that the current problem P scale does not exceed n0, the problem is easy to solve, no longer need to continue decomposition.Adhoc (P) is the basic sub-algorithm in the division method, which can be direc

instance, call in Main.c, verify success:U8 buf[8] = {Gtp_reg_version >>8, Gtp_reg_version 0xFF};//version is double-byte, here is the high-byte, low -byteRET = gtp_i2c_read (client, buf,sizeof(BUF)); = U8 buf[8] = {Gtp_reg_version >>8, Gtp_reg_version 0xFF}; //The first 2 bytes have been stored in gtp_reg_version, starting from buf[2], where the data structure remains consistent for subsequent code BUF[8]RET =i2c_read0 (0x5c, Gtp_reg_version, buf[2],6) i2c_read0 (0x5c, gtp_reg_version)//U16 wi

0Test:Package Test1;public class TestClass {public static void main (string[] args) {//Boolboolean B = false; System.out.println (b);//constant final float $fData = 10.2f; System.out.println ($fData);//The displacement operation int J = 4;//The highest bit is 0, the right to move the empty bit is filled in 0, the highest bit is 1, the right to move the empty bit is filled in 1system.out.println (J >> 2); 0system.out.println (J >>> 2) is filled in with the right-hand-shifted space;}The linguisti

/********************************************************************** Author:samson* date:04/18/2014* Test Platform:* Linux Ubuntu 3.2.0-58-generic-pae* GNU Bash, version 4.2.39* *******************************************************************/#!/bin/bashWhile read lineDo#杀掉全部的python程序.Killall Python2#用读取到的行的參数作为输入运行 *******test.py python program, and the results are recorded in the line of the 110ut file, which is a row of the corresponding log file;./*******test.py $line > {$line}11out Ec

Select sort (Selection sort) Basic introduction Select Sort:The smallest (or largest) element is selected for each data element that has never been sorted, stored at the beginning of the sequence, and then the smallest (or largest) of the remaining unsorted elements is placed at the end of the sorted sequence until all the data elements to be sorted are exhausted.Select Sort is an unstable sort method (for example, sequence [5, 5, 3] swaps the first [5] with [3] for the f

Under Linux, it is often necessary to execute some scripts regularly to implement some functions. Under Linux we use crontab to implement the regular execution of the script this function, the following describes the use of crontab. And some of the problems I've encountered. 　I. Description of the use of crontab 1. Crond is the command that Linux uses to execute programs on a regular basis. When the operating system is installed, the task Schedulin

Oracle automatically creates partitions on a daily basis Due to the accumulation of a table in the database, the table space is not built, but the table is not partitioned, and the deletion time is often caused by the DELETE statement timeout. So create a new partition table for later maintenance by rename. New Day partition Table Rename New Day partition Table CREATE TABLE weibo_detail_newPARTITION by RANGE (CREATED_AT)INTERVAL (Numtodsinterval (1,

basis of Common machine learning Data mining knowledge points SSE (Sum of squared error, squared error and) SSE=∑I=1N (Xi−x⎯⎯⎯) 2 sse=\sum_{i=1}^{n} (x_i-\overline{x}) ^2 SAE (sum of Absolute error, absolute error and) sae=∑i=1n| xi−x⎯⎯⎯| sae=\sum_{i=1}^{n}| x_i-\overline{x}| SRE (Sum of Relative error, relative error and) Sre=∑i=1nxi−x⎯⎯⎯x⎯⎯⎯sre=\sum_{i=1}^{n}{\frac{x_i-\overline{x}}{\overline{x}}} MSE (Mean squared error, mean square error) Mse=∑ni

of communication A friend has a good way to go:1. IQ is important, EQ is more important: Be sure to build a network before you are 35 years old.2. The network is the financial vein.3. Friends have principles.4. Good communication: Before 35 years old must exercise their own speech, many successful people first is a good orator. The Nineth chapter: nine Points of habit The power of habit is staggering, and the habit of being 35 years old determines the size of your success.1. Good habits of po

Photo Processing network has been lack of relevant theoretical basic knowledge, the major domestic design, photography site can not find a photo processing color-related basic theoretical knowledge, therefore, through the collection and inspection and collation, and then digest and summary, wrote the "Photo processing in the color feast." Also hope that all the students teacher corrected and supplemented. This series of tutorials contains three major chapters: The first chapter: the Family----

massive data growth, linear increase business processing speedThe single-meter billion-level record is split into 128 shards of rds-mysql with the taxpayer as the split key. To support the storage of massive data. After the database design is concise and simple, there is no foreign key between the tables in the database, no trigger is written, no stored procedure is written, and the level expansion of database records is realized.3, read-write separation to improve query performanceDDM automate

Many students may ask before they can learn PHP. what is the basis for learning PHP? What does PHP need to learn? The next article in the PHP Chinese web will share with you about what is the basic knowledge you need to learn PHP? What is the meaning of PHP that we introduced to you in our last article? Why is PHP a well-spoken language in the world? Although the PHP learning threshold is very low, but the threshold of learning PHP is lower, we also

;/etc/rc.local# tail-4/etc/rc.local The results shown are as follows: # MySQL Multi instances startup/data/ 3306/mysql start/data/3307/mysql start/data/3308/mysql Start6) Initializing the databaseSet MySQL initial password: # mysqladmin-u root-s/data/3308/mysql.sock password ' redhat12345 ' # mysql-u root-s/data/3308/mysql.sock-Predhat12345welcome to the MySQL Monitor.Commands End With; or \g.your MySQL connection ID is 4Server version:5.5.32-log Source distributioncopyright (c), +, Oracle and/o

first and stores the resulting list in an indexed temporary table. Before executing a subquery, the system first suspends the primary query, and executes the subquery until it has been executed, and then performs the main query after the query is held in the temporary table. In is the appearance and the inner table as a hash connection, and exists is the external loop loop, each loop loop and then query the internal table, has always been considered exists than in the high efficiency of the a