Thursday, November 3, 2011

Python File Operation

Python File Operation:
The below is the script to help to learn about the file read, write operation.
Script will ask operation from the user and do the operation accordingly.

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import properties
from properties import filePath
# Program is about read and write operation
# Need to write the file and specify the Name of the file and reading the file.

def writeFile(filename,content):
    f=open(filename,"w")
    f.write(content)
    f.close()

def readfile(filename):
    f=open(filename,"r")
    text=f.read()
    f.close()
    print text


def print_menu():
    print '========================'
    print 'Select any one operation'
    print '1. Write the file'
    print '2. Read the file '
    print '4. exit'
    print
menu_choice = 0
print_menu()
while True:
    menu_choice = input("Type in a number (1-3): ")
    if menu_choice==1:
        print 'Enter the text do you want to write in to the file:'
        filename = raw_input('Enter the name of the file:')
        print 'Next Step ..'
        cont = raw_input('Enter the text')
        writeFile(filePath+filename.rstrip('\n\r '),cont)
    elif menu_choice==2:
        print 'The content of the file is :'
        readfile(filePath+filename.rstrip('\n\r '))
    elif menu_choice==3:
        select = raw_input('You selected to exit yes or no ?')
        try:
            if select.rstrip('\n\r ') == "yes":
                print 'Good bye'
                break
            else:
                print_menu()
        except ValueError:
            print "That was not a Charector ."
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Python List Operation

Python List Operation:
List : Its a sequential collection of object or any element/data type is called List.
The below is the script will help you to lean about the list operation.

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#This program will do the list operation in doing the def functions, using the user defining function its very easy to debug the program and undestandable.


def lookup_ele(eleSerch,list):
    if eleSerch in list:
        print "element has been in the list "
    else:
        print " element",eleSerch,"is not in the list"

def print_list(list):
    i =0

    if len(list)>0:
        print "List as give below \n"
        while i<len(list):
            print i,":",list[i]
            i =i+1
    else:
        print "Empty list "


def add_list(ele,list):
    list.append(ele)
#    return list

def remove_ele(ele,list):
    if ele in list:
        print "Element is found"
        list_num = list.index(ele)
        del list[list_num]
        print ele+" elments has been deleetd from the list "
    else:
        print "element is not found"

def print_menu():
    print '================================='
    print '        List operations          '
    print ' ================================'
    print '1. Display list '
    print '2. Add element to the list '
    print '3. Remove element '
    print '4. Lookup a elements '
    print '5. Quit'
    print ' Please enter the selected value :'
    print '----------------------------------'
list = []
menu_choice = 0
print_menu()
while True:
    menu_choice = input("Type in a number (1-5): ")
    if menu_choice == 1:
        print_list(list)
    elif menu_choice == 2:
        print "Add elements "
        ele = raw_input("element: ")
        add_list(ele,list)
    elif menu_choice == 3:
        print "Remove element"
        ele = raw_input("element: ")
        remove_ele(ele,list)
    elif menu_choice == 4:
        print "Lookup element"
        eleSerch = raw_input("ele: ")
        print lookup_ele(eleSerch,list)
    elif menu_choice == 5:
        break
    else:
        print_menu()
print "Goodbye"
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Wednesday, November 2, 2011

Python Basic Operation

Python: Arithmetic Operation 

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#this program you have to create one file called properties file in that you have to define a and b variable
#need to import those variable in this program by using from <properties file> import <varible>
import properties

from properties import a
from properties import b
sum =  a + b
diff = a-b
div = a/b
product = a*b
print 'Sum of this ',a,'and',b,'value is :',sum
print 'Diffence of this ',a,'and',b,'value is :',diff
print 'Product of this ',a,'and',b,'value is :',product
print 'Division of ',a,'and',b,'value is :',div
Program2: String Operation program : 
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#this program you have to create one file called properties file in that you have to define a and b variable
#need to import those variable in this program by using from <properties file> import <varible>

import properties

from properties import str1
from properties import str2

newStr = str1 + str2
newRama = str2*3
firstIndex = str2[0]
last2ndIndex = str2[-1]
newstring3 = str2[1:4]
lengthStr = len(str2)
comp = str1 < str2
find = "e" in str1
strUpper = str2.upper()
strLower = str2.lower()


print 'The concatinated String',str1,'+',str2,'is:',newStr
print 'Multiple of ',str2,'is:',newRama
print 'First index of ',str2,'is :',firstIndex
print 'Last 2nd index of ',str2,'is:',last2ndIndex
print '1st Inddex to 2nd Index of ',str2,'is:',newstring3
print 'Lenth of the string',str2,'is:',lengthStr
if find:
    print 'The \'e\' is prasent in the',str1,'is found'
else :
     print 'The \'e\' is prasent in the',str1,'is not found'

if comp:
    print str1,'is less then',str2
else:
    print str1, 'is not less then',str2
print 'Upper case of ',str2,'is:',strUpper
print 'Lowere case of ',str2,'is :',strLower
program 3: List program 
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#this program you have to create one file called properties file in that you have to define a and b variable
#need to import those variable in this program by using from <properties file> import <varible>
import properties
from properties import list1
from properties import list2


print "The existing list is ",list1
print " 2nd list is :",list2

newList = list1+list2

list3=list1*3

print "Concatinated new list is:",newList
print "multiple of list:",list1,"is:",list3

list1[0]= "pattar"
print "The list added pattar ",list1
print "2nd to 3rd element of this array",list1[1:2]
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