x01.polls: 学习 django

开发一个 Web 应用：x01.polls，可能比想像的还要容易一些，这完全得益于 django 框架。

1.安装 django：

    sudo pip3 install django

2.阅读 django 文档

3.运行效果图如下：

    

的确很棒，连 search， filter 等功能都提供了。

批量修改文件扩展名及大小写的一点代码，放在此备用：

# --------------------------------
# change_files.py (c) 2017 by x01 
# --------------------------------

import os

def changeCase(dir, isupper):
    """
    Change file and directory case by isupper parameter.
    """
    files = os.listdir(dir)
    for f in files:
        path = os.path.join(dir,f)
        newpath = ""
        if (isupper):
            newpath = path.upper()
        else:
            newpath = path.lower()
        if os.path.isdir(path):
            os.rename(path, newpath)
            changeCase(path, isupper)
            continue
        os.rename(path, newpath)
    
def changeExtName(dir, orgExtName, newExtName):
    """
    Change file org-ext-name  to new-ext-name.
    """
    filelist=os.listdir(dir)   
    for files in filelist: 
        path=os.path.join(dir,files) 
        if os.path.isdir(path):   
            changeExtName(path, orgExtName, newExtName)
            continue
        filename=os.path.splitext(files)[0]
        filetype=os.path.splitext(files)[1] 
        if (filetype != orgExtName):
            continue
        newPath=os.path.join(dir, filename + '.' + newExtName); 
        os.rename(path,newPath)