#ran

Python3中遇到UnicodeEncodeError: 'ascii' codec can't encode characters in ordinal not in range(128)

在linux服务器上运行代码报错:Python3中遇到UnicodeEncodeError:‘ascii’codeccan’tencodecharactersinordinalnotinrange(128)但是在windows上面运行代码正常。原因是因为:linux系统语言导致的。查...

Maven error in eclipse (pom.xml) : Failure to transfer org.apache.maven.plugins:maven-surefire-plugin:pom:2.12.4

iwannamakewebprojectusingtheMaventoimportautomaticallyalllibrariesthatineed,soichose "maven-archetype-webpp"afterthatigotthiserroronpom.xmlfile:Description...

random froest 调参

https://blog.csdn.net/wf592523813/article/details/86382037 https://blog.csdn.net/xiayto/article/details/80029044 n_estimators最大深度max_depth和内部节点再划分所需最小...
代码星球 ·2020-04-10

Sql 四大排名函数(ROW_NUMBER、RANK、DENSE_RANK、NTILE)(转载)

   排名函数是SqlServer2005新增的功能,下面简单介绍一下他们各自的用法和区别。我们新建一张Order表并添加一些初始数据方便我们查看效果。 CREATETABLE[dbo].[Order]([ID][int]IDENTITY(1,1)NOTNULL,[UserId][int]NOTNU...

php rand()和mt_ran(),还有随机数生成器

PHP的rand()函数默认使用libc随机数发生器。mt_rand()函数是非正式用来替换它的。该函数用了MersenneTwister中已知的特性作为随机数发生器,它可以产生随机数值的平均速度比libc提供的rand()快四倍。...
代码星球 ·2020-04-10

mysql grant命令

增删改查的权限grantselectontestdb.*tocommon_user@'%'grantinsertontestdb.*tocommon_user@'%'grantupdateontestdb.*tocommon_user@'%'grantdeleteontestdb.*tocommon_user@'%'g...
代码星球 ·2020-04-10

2019-7-18 collections,time,random,os,sys,序列化模块(json和pickle)应用

一、collections模块  1.具名元组:namedtuple(生成可以使用名字来访问元素的tuple)  表示坐标点x为1 y为2的坐标  注意:第二个参数可以传可迭代对象,也可以传字符串,但是字符串要隔开fromcollectionsimportnamedtuplepoint1=namedtuple...

Android之ViewPager.PageTransformer

继承PageTransformer,滑动ViewPager,可以观察到publicabstractclassAbsBaseViewPagerTransferimplementsViewPager.PageTransformer{privatestaticfinalUtilsLoglg=UtilsLog.getLogge...
代码星球 ·2020-04-09

05-树8 File Transfer (25 分)

Wehaveanetworkofcomputersandalistofbi-directionalconnections.Eachoftheseconnectionsallowsafiletransferfromonecomputertoanother.Isitpossibletosendafilefromanycom...
代码星球 ·2020-04-09

05-树8 File Transfer (25 分)

Wehaveanetworkofcomputersandalistofbi-directionalconnections.Eachoftheseconnectionsallowsafiletransferfromonecomputertoanother.Isitpossibletosendafilefromanycom...
代码星球 ·2020-04-08

1141 PAT Ranking of Institutions (25 分)

AftereachPAT,thePATCenterwillannouncetherankingofinstitutionsbasedontheirstudents'performances.Nowyouareaskedtogeneratetheranklist.InputSpecification:Eachinputf...

05-树8 File Transfer (25 分

Wehaveanetworkofcomputersandalistofbi-directionalconnections.Eachoftheseconnectionsallowsafiletransferfromonecomputertoanother.Isitpossibletosendafilefromanycom...
代码星球 ·2020-04-08

1025 PAT Ranking (25)

ProgrammingAbilityTest(PAT)isorganizedbytheCollegeofComputerScienceandTechnologyofZhejiangUniversity.Eachtestissupposedtorunsimultaneouslyinseveralplaces,andthe...
代码星球 ·2020-04-08

1012. The Best Rank (25)

ToevaluatetheperformanceofourfirstyearCSmajoredstudents,weconsidertheirgradesofthreecoursesonly:C-CProgrammingLanguage,M-Mathematics(CalculusorLinearAlgebra),an...
代码星球 ·2020-04-08

django.db中的transaction

transaction.set_autocommit(0).............................transaction.commit()  可以使夹在其两句中间的所有SQL语句一起形成一个事务。...
代码星球 ·2020-04-08
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