Lab 2

Part 2 Programming Exercise

1. lab2q1.py

   
   import tkinter as tk
   import random
   
   from shape.taichi import Taichi
   
   def main():
    
       root = tk.Tk()  
       canvas = tk.Canvas(root,height=500,width=500)
       
       for i in range(4):  
           for j in range(4):
               t=Taichi(100+i*100,100+j*100,45,
                        "#%02x%02x%02x"%
                        (int(random.random()*256),
                         int(random.random()*256),
                         int(random.random()*256)),
                        "#%02x%02x%02x"%
                        (int(random.random()*256),
                         int(random.random()*256),
                         int(random.random()*256)),canvas)
               t.draw()    
       
       root.mainloop()  
   
   if __name__ == '__main__':
       main()  
   

2. lab2q2.py

   
   def main():
           loanAmount = float(input("The loan amount is : "))
           annualInterestRate = float(input("The annual interest rate is: "))
           monthlyPayment = float(input("The monthly payment is: "))
   
           month = 1
           startingBalance = loanAmount
           payment = monthlyPayment
           middleBalance = loanAmount - payment
           interest = middleBalance * annualInterestRate/12/100
           endingBalance = middleBalance + interest
           
           print("\n")
           print("%25s%30s%30s"%
                 ("Starting","Middle","Ending"))
           print("%10s%15s%15s%15s%15s%15s"%
                 ("Month","Balance","Payment","Balance","Interest","Balance"))
           print("-"*85)
                 
           while startingBalance > 0:
               print("%10d%15.2f%15.2f%15.2f%15.2f%15.2f"%
                 (month,startingBalance,payment,middleBalance,interest,endingBalance))
               
               month+=1
               startingBalance = endingBalance
               
               if endingBalance > monthlyPayment:
                   payment = monthlyPayment
               else: payment = endingBalance
               
               middleBalance =  startingBalance - payment
               interest = middleBalance * annualInterestRate/12/100
               endingBalance = middleBalance + interest
               
   if __name__ == "__main__":
       main()
   

3. lab2q3.py

   
   fileIn = open('datafile1.dat', 'r')
   
   clientDT=['Name','Address','Balance']
   clientDL=[]
   line = fileIn.readline()
   
   while line != '':
       clientRec=line.split('_')
       if len(clientDL) == 0:
           if clientRec[2] == 'D':
               clientDL.append(dict(zip(clientDT,
                                        [clientRec[0],clientRec[1],float(clientRec[3])])))
           else:
               clientDL.append(dict(zip(clientDT,
                                        [clientRec[0],clientRec[1],-float(clientRec[3])])))            
       else: 
           i = 0
           while i < len(clientDL) and clientDL[i]['Name'] != clientRec[0]:
               i += 1
               
           if i == len(clientDL):
               if clientRec[2] == 'D':   
                   clientDL.append(dict(zip(clientDT,
                                            [clientRec[0],clientRec[1],float(clientRec[3])])))
               else:
                   clientDL.append(dict(zip(clientDT,
                                            [clientRec[0],clientRec[1],-float(clientRec[3])])))                
           else:
               if clientRec[2] == 'D':
                   clientDL[i]['Balance'] += float(clientRec[3])
               else: clientDL[i]['Balance'] -= float(clientRec[3])
               
       line = fileIn.readline()
               
   print('%-20s%-30s%10s'%(clientDT[0],clientDT[1],clientDT[2]))
   print('='*60)    
   for e in sorted(clientDL, key = lambda c: c['Name']):
       if e['Balance'] != 0:
           print('%-20s%-30s%10.2f'%(e['Name'],e['Address'],e['Balance'])) 
             
   fileIn.close()
   

4. lab2q4.py

   
   #!%python path%/python.exe
   import time
   import cgi
   
   html5top='''
   <!-- {fname} -->
   <!DOCTYPE html>
   <html>
    <head>
     <title>{title}</title>
    </head>
    <body>
     <h1>{header}</h1>
   '''
   html5bottom='''
    </body>
   </html>
   '''
   
   print (html5top.format(fname='cgilogon.py', title='CGI',header='Logon'))
   
   form = cgi.FieldStorage()
   
   if 'name' in form:
       if form['password'].value == 'abc':
           print ("<h1>Welcome, %s!</h1>" % form[ 'name' ].value)
           print ("My PDP")
       else: print ("<h1>password incorrect %s!</h1>" % form[ 'password' ].value)
   
   print (time.ctime( time.time() ))
   print (html5bottom)
    
   

5. lab2q5.py

   
   #!%python path%/python.exe
   import time
   import urllib.request
   
   fileIn=urllib.request.urlopen('http://personal.cityu.edu.hk/~dcywchan/2004dco10803/datafile1.txt')
   byteStr = fileIn.read()
   lines=byteStr.decode('utf-8')
   lineSep=lines.split('\r\n')
   
   clientDT=['Name','Address','Balance']
   clientDL=[]
           
   for e in lineSep:
       if e != '':
           clientRec=e.split('_')
           if len(clientDL) == 0:
               if clientRec[2] == 'D':
                   clientDL.append(dict(zip(clientDT,
                                        [clientRec[0],clientRec[1],float(clientRec[3])])))
               else:
                   clientDL.append(dict(zip(clientDT,
                                        [clientRec[0],clientRec[1],-float(clientRec[3])])))            
           else: 
               i = 0
               while i < len(clientDL) and clientDL[i]['Name'] != clientRec[0]:
                   i += 1
               
               if i == len(clientDL):
                   if clientRec[2] == 'D':   
                       clientDL.append(dict(zip(clientDT,
                                            [clientRec[0],clientRec[1],float(clientRec[3])])))
                   else:
                       clientDL.append(dict(zip(clientDT,
                                            [clientRec[0],clientRec[1],-float(clientRec[3])])))
               else:
                   if clientRec[2] == 'D':
                       clientDL[i]['Balance'] += float(clientRec[3])
                   else: clientDL[i]['Balance'] -= float(clientRec[3])
   
   html5top='''
   <!-- {fname} -->
   <!DOCTYPE html>
   <html>
    <head>
     <title>{title}</title>
    </head>
    <body>
     <h1>{header}</h1>
   '''
   html5bottom='''
    </body>
   </html>
   '''
   tableHeader='''
   <table border=1>
   <tr><th>Name</th><th>Address</th><th>Balance</th></tr>
   '''
   print (html5top.format(fname='lab2q5.py',title='Simple Billing Web Page',header='Customer Table'))
   
   print(tableHeader)
   
   for e in sorted(clientDL, key = lambda c: c['Name']):
       if e['Balance'] != 0:
           print ('<tr><td>'+e['Name']+'</td>'+
                  '<td>'+e['Address']+'</td>'+
                  '<td>'+str(e['Balance'])+'</td></tr>')
   
   print('</table>')
   print('<p />')
   
   print (time.ctime( time.time() ))
   print (html5bottom)
   
   fileIn.close()