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YT-er / vscode.md
Last active January 17, 2019 02:47
vscode设置

VScode设置

{
    "workbench.colorTheme": "Atom One Light",
    "workbench.iconTheme": "vscode-icons",
    "code-runner.executorMap": {
        "javascript": "node",
        "java": "cd $dir && javac $fileName && java $fileNameWithoutExt",
        "c": "cd $dir && gcc $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt",
@YT-er
YT-er / spider.md
Last active January 17, 2019 09:26
scrapy的一些问题记录

Scrapy记录

20190116

start_urls

start_urls是必须的，而且要是list形式，哪怕只有1个，它是Spider类的默认属性。

json输出中文

在settings.py里设置

@YT-er
YT-er / linux.md
Last active January 21, 2019 03:03
linux常用命令及技巧

Linux常用命令

删除文件前100行

sed -i "1,100d" filename

在文件最前面插入一列序号




  


  




    


          
    

      

        
        

          

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                YT-er
                / note.md
            
            

              Last active
              March 7, 2019 07:25
            

              
                随时记录问题和结果
              
          

        

      

        

  

      

    
每天有点小疑问


20190110


Q：assert是什么？


A：python assert断言是声明其布尔值必须为真的判定，如果发生异常就说明表达示为假。可以理解assert断言语句为raise-if-not，用来测试表示式，其返回值为假，就会触发异常。


assert expression



  


  




    


          
    

      

        
        

          

              @YT-er
          

          

            
                YT-er
                / code.md
            
            

              Last active
              January 15, 2019 06:08
            

              
                放代码片
              
          

        

      

        

  

      

    
代码片


utf头注释


	"utf file header": {
		"prefix": "utf",
		"body": [
		  "# -*- coding: utf-8 -*-",
			"",