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How to design a database table. There is no common answer, but we can discuss some best practices. Let us start with a simple example, a config or master table for saving all states and territories of Unites States. Below are some basic rules(best practices) to follow while creating a database table Every tables should have a primary key or technical key ( if possible ). Primary key is referred as Technical key because it is generally ( disclaimer :- The above example is only to explain the basic table creation guidelines ) How to create daily backup in python ? Using shutil and date packages we can create a simple daily backup script. > # Author : Manoj Koyadan > # Purpose: Daily folder backup script  > # Operating System – Ubuntu 64-bit > # Python Version – 2.7.11 > print “Backup created as zip file at-“,self.tofolder >  > def backup(self): > shutil.copytree(self.fromfolder,self.tofolder) #copying Note that above program reads all files from a particular folder and copy to another backup folder after zipping it. You can customize it by choosing only particular file types. This script can be automated by calling from a shell script or control-m job. it will create new > # Operating System – Windows 7 64-bit > # Python Version – 2.7.11 > print “Backup created as zip file at-“,self.tofolder >  > def backup(self): > shutil.copytree(self.fromfolder,self.tofolder) #copying Note:- Above code may not work if you copy and paste exactly. Please format as per python interpreter ( or Use any python IDLE, I used How to create a an*log clock in python ?. Need little bit of mathematical knowledge. This is the place you can brush your knowledge in Sin and Cos(Mathematical functions) Learn more on “Polar coordinate system” and understand the fundamentals. Clock code has been developed and tested with below versions. Operating System – Windows 7 64-bit Python Version – 2.7.11 > import Tkinter as tk > from math import sin,cos,pi