gevent协程

模拟多线程运行

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from gevent import monkey
monkey.patch_all()
import gevent
 
def foo():
    print('Running in foo')
    gevent.sleep(0)
    print('Explicit context switch to foo again')
 
def bar():
    print('Explicit context to bar')
    gevent.sleep(0)    
    print('Implicit context switch back to bar')
 
gevent.joinall([
    gevent.spawn(foo),
    gevent.spawn(bar),
])
编程

python遍历文件夹

followlinks表示是否扫描软连接，topdown是否广度遍历

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def get_file_path(dir_path):
    """获取文件夹下面的所有文件，包括子文件夹"""
    file_list = os.walk(dir_path, topdown=True, onerror=None, followlinks=False)
    for root, dirs, files in file_list:
        for f in files:
            path = os.path.join(root, f)
            yield path.replace('\\', '/')

编程

常用压缩命令

解压

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tar -xvf file.tar
tar -xzvf file.tar.gz
tar -xjvf file.tar.bz2
tar -xZvf file.tar.Z
unrar e file.rar
unzip file.zip
tar zxvf file.tgz
gzip -d

压缩

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压缩: tar -cvf FileName.tar DirName
解压: tar -xvf FileName.tar
 
例子: c++目录 压缩成 c++.tar
tar -cvf c++.tar c++
 
c++.tar解压成c++
tar -xvf c++.tar
编程

win32项目中调出和隐藏控制台

显示控制台，并且能用print打印显示，方便调试

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::AllocConsole();
::SetConsoleTitle(_T("测试控制台"));
freopen("conin$","r+t",stdin);
freopen("conout$","w+t",stdout);
freopen("conerr$","w+t",stderr);
//释放
FreeConsole();

win32控制台工程隐藏dos窗口

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#pragma comment( linker, "/subsystem:windows /entry:mainCRTStartup" )
编程

常用js代码

判断是否ip地址

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function check_is_ip(s) {
    var patt = /^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])(\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])){3}$/;
    return patt.test(s);
}

字符串格式化

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String.prototype.format  = function() {    
    var args = arguments;    
    return this.replace(/\{(\d+)\}/g, function(m,i) {    
        return args[i];    
    });    
};
编程

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Qt设置渐变背景

qss

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background-color: qlineargradient(spread:repeat, x1: 0, y1: 0, x2: 0, y2: 1, stop: 0#2ba0d6, stop: 1 #138abd);

widget

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QLinearGradient linearGradient(0, 0, 0, 300);
linearGradient.setColorAt(0.0, Qt::green);
linearGradient.setColorAt(1.0, Qt::blue);
QPalette pal;
pal.setBrush(QPalette::Window, QBrush(linearGradient));
//设置背景自动填充
ui->widget->setAutoFillBackground(true);
ui->widget->setPalette(pal);
编程

nginx配置https证书 

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#upstream mysvr {
#    server 127.0.0.1:8099 weight=1;  
#    server 127.0.0.1:8099 weight=1;
#}
server {
    server_name example.com;
    listen 443 ssl;
    ssl_certificate     /home/stat/example.com/cert/example.com.crt;
    ssl_certificate_key /home/stat/example.com/cert/ca.example.com.key;
    ssl_session_cache    shared:SSL:1m;
    ssl_session_timeout  5m;
    ssl_ciphers  HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers  on;
    log_format  example_log '[$time_local] $remote_addr "$request" '
                        '$status $upstream_status $body_bytes_sent $request_time $upstream_response_time '
                        '"$remote_user" "$http_user_agent" "$http_referer"';
    access_log /var/www/example/nginxlog/access.log example_log;
    error_log  /var/www/example/nginxlog/error.log;
    gzip on;
    location ~ ^/static/ {
        root /var/www/example;
    }
    location / {        
        proxy_set_header    Host    $host;
        proxy_set_header    X-REAL-IP   $remote_addr;
        proxy_set_header    X-FORWARDED-FOR $proxy_add_x_forwarded_for;
        proxy_ignore_client_abort on;
        #proxy_pass  http://mysvr;
        proxy_pass http://127.0.0.1:8099;
    }
}
编程

mysql数据库设置

修改密码

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mysqladmin -u用户名 -p旧密码 password 新密码

备份还原数据库

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# 设置从特定地址的服务器导出数据, 缺省主机是localhost, 则设置参数-h 或 --host=
# 备份所有数据库:
mysqldump -u root -p123  --all-database  >  test.sql
# 备份数据库test
mysqldump -u root -p123  dbname >  dbname.$(date "+%Y-%m-%d").sql
# 备份数据库test下的temp表:
mysqldump -u root -p123  test demp >  test.sql
# 还原数据库test
mysqldump -u root -p123  test  <  test.sql
# 还原数据库test下的temp表:
mysqldump -u root -p123  test demp < test.sql
# 但是有时候这样还原不了，那就进入mysql控制台，使用命令：
source test.sql
编程

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