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Python Application 4 - Replace Text Content

Step 1

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

#!/usr/bin/python

#Author : Jijo K Jose

print "\n------------------------------------\nChapter 22 - Regular Expression 5 \n------------------------------------\n"

import re

in_str = raw_input("Enter a text         : ")

se_str = raw_input("Enter search string  : ")

re_str = raw_input("Enter replace string : ")

count = 10

reg1 = re.compile(se_str)

print "Result : ",reg1.sub(re_str,in_str,count)

print "\n-----------------------------------\n"

#END

Python Application 3 - Check Email Address

Step 1

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

#!/usr/bin/python

#Author : Jijo K Jose

print "\n------------------------------------\nChapter 20 - Regular Expression 4 \n------------------------------------\n"

import re
in_str = raw_input("Enter an email address : ")
se_str = "\w+@\w+\.[com|in|org|net]"
reg1 = re.compile(se_str)
search1 = reg1.search(in_str)

if search1:

 print "\nValid email address"
else:
 print "\nInvalid email address"

print "\n-----------------------------------\n"
#END

Python Application 2 - Extract File Content

Step 1

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

#!/usr/bin/python

#Author : Jijo K Jose

f1 = open("logfile","r")

for i in f1.readlines():

 j = i.split(' ')

 print j

#END

Python Application 1 - Format File Content

Step 1

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

#!/usr/bin/python

#Author : Jijo K Jose
input_file = raw_input("\nEnter input file name : ")
output_file = "file_new.txt"
h1 = open(input_file,"r")
print "\n----------------------------"
print "Input File Content"
print "----------------------------\n"
for i in h1:
 print i,

h1.close()
h1 = open(input_file,"r")
h2 = open(output_file,"w")
k=0
for i in h1:
 i2 = i.split(',')
 for j in i2:
  n = len(j)
  if j[n-1] =="\n":
   h2.write(j)
 else:
  h2.write(j)

  h2.write("\n")

h1.close()

h2.close()

print "\n---------------------------"

print "Output File Content - file_new.txt"
print"----------------------------\n"
h1 = open(output_file,"r")
for i in h1:
 print i,
print "\n---------------------------\n"
#END

Chapter 22 – Python Regular Expression Part 5

Step 1

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

#!/usr/bin/python

#Author : Jijo K Jose

print "\n------------------------------------\nChapter 22 - Regular Expression 5 \n------------------------------------\n"
import re
in_str = raw_input("Enter a text         : ")
se_str = raw_input("Enter search string  : ")
re_str = raw_input("Enter replace string : ")
count = 2
reg1 = re.compile(se_str)
print "Result : ",reg1.sub(re_str,in_str,count)

print "\n-----------------------------------\n"

#END

Chapter 21 – Python Regular Expression Part 4

Step 1

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

#!/usr/bin/python

#Author : Jijo K Jose
print "\n------------------------------------\nChapter 21 - Regular Expression 4 \n------------------------------------\n"
import re
in_str = raw_input("Enter an email address : ")
se_str = "\w+@\w+\.[com|in|org|net]"
reg1 = re.compile(se_str)

search1 = reg1.search(in_str)

if search1:
 print "\nValid email address"
else:
 print "\nInvalid email address"
print "\n-----------------------------------\n"

#END

Chapter 20 – Python Regular Expression Part 3

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 20 - Regular Expression 3 \n------------------------------------\n"

 

import re

 

in_str = raw_input("Enter the text : ")

 

se_str = raw_input("Enter search string : ")

 

reg1 = re.compile(se_str)

 

find1 = reg1.findall(in_str)

 

print "\nOutput of - .findall() : ", find1 

 

print "\n-----------------------------------\n"

 

iter1 = reg1.finditer(in_str)

 

print "Output of - .finditer() : \n"

 

for i in iter1:

 print i.group() 

 

print "\n-----------------------------------\n"

 

#END

Chapter 19 – Python Regular Expression Part 2

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 19 - Regular Expression 2 \n------------------------------------\n"

 

import re

match_str = "jijo k 50 JOSE"

search_str = "[a-z]+.*"

 

print "Input String : %s"%match_str

 

print "\n-----------------------------------\n"

 

reg1 = re.compile(search_str,re.IGNORECASE)

match = reg1.match(match_str)

 

print "Address Location : ",reg1.match(search_str)

print "Search string : ",search_str

print "Matched string : ",match.group()

 

print "\n-----------------------------------\n"

 

search_str = '[a-z]+\s[a-z]\s[0-9]+\s\w[A-Z]'

reg1 = re.compile(search_str)

match = reg1.match(match_str)

 

print "Search string : ",search_str

print "Matched string : ",match.group()

 

print "\n-----------------------------------\n"

 

#END

Chapter 18 - Python Regular Expression Part 1

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 18 - Regular Expression 1 \n------------------------------------\n"

 

import re

match_str = raw_input("Enter a text : ")

search_str = raw_input("Enter search string : ")

 

reg1 = re.compile(search_str,re.IGNORECASE)

 

print "Address Location : ",reg1.match(match_str)

 

print "\n-----------------------------------\n"

 

match = reg1.match(match_str)

 

if match:

 print "Match - Found : ",match.group()

else:

 print "No match found !!! "

 

print "\n-----------------------------------\n"

 

search = reg1.search(match_str)

 

if search:

 print "Search Found : ",search.group()

else:

 print "No searched result !!!"

 

print "\n-----------------------------------\n"

 

#END

Chapter 17 - Python High Level File I/O Operations

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

import shutil

 

print "\n------------------------------------\nChapter 17 - High level File I/O \n------------------------------------\n"

 

s = shutil

 

s.copy("data1","data5")

 

print "File data1 copied to data5 -shutil.copy() \n"

 

s.copy2("data1","data6")

 

print "File data1 copied to data6 without changing timestamp -shutil.copy1() \n"

 

s.move("data5","temp/data7")

 

print "File data5 moved to temp/data5 -shutil.move() \n" 

 

srcdir = "temp"

desdir = "temp2"

 

s.rmtree(desdir)

 

print "Remove the whole directory tree -shutil.rmtree() \n"

 

s.copytree(srcdir,desdir)

 

print "Copy the whole directory tree -shutil.copytree() \n"

 

print "\n----------------------------------------"

 

#END

Chapter 16 - Python Functions

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 16 - Functions \n------------------------------------\n"

 

def sum_mul(a,b):

 return a+b,a*b

 

c,d = sum_mul(10,20)

 

print "Sum = %d and Product = %d" %(c,d) 

 

print"----------------------------------------"

 

#END

Chapter 15 - Python Exceptions

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 15 - File Writing \n------------------------------------\n"

 

while 1:

 f1=raw_input("Enter the file name : ")

 try:

  h1 = open(f1,"r")

  print "\nFile contents are :\n",h1.read()

  break 

 except:

  print "Problem in opening file : ",f1

 

print"----------------------------------------"

 

#END

Chapter 14 – Python File Write Operations

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 14 - File Writing \n------------------------------------\n"

 

h1 = open("data1","r")

h2 = open("data2","w")

h3 = open("data3","w")

print h1

 

h1 = open("data1","r")

s = h1.readlines()

print "\nReading the Content - readlines() : ",s

 

for i in s:

 h2.write(i)

 

print "File contents are written to data2 using write()"

 

h3.writelines(s)

print "File contents are written to data3 using writelines()"

 

print "\n--------------------------------------\n"

 

h1.close()

h2.close()

 

#END

Chapter 13 - Python File Read Operations

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 13 - File Reading \n------------------------------------\n"

 

h1 = open("data1","r")

print h1

 

print "\nReading the first line -readline() : ",h1.readline()

 

h1 = open("data1","r")

print "\nReading the full content - read() : \n",h1.read()

 

h1 = open("data1","r")

print "\nReading the First 25 Character - read(25) : ",h1.read(25)

 

h1 = open("data1","r")

print "\nReading the Content - readlines() : ",h1.readlines()

 

print "\n--------------------------------------\n"

 

#END

Chapter 12 - Python While Loop

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 12 - While Loop \n------------------------------------\n"

 

c=1

while(c!=0):

 i = input("Enter an integer : ")

 while(i > 0):

  print i

  i -= 1

 c = input("To quit press 0 : ")

 

print "\n--------------------------------------\n"

 

#END

Chapter 11 - Python For Loop

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 11 - For Loop \n------------------------------------\n"

 

for i in range(10,25,2):

  print i

 

print "\n--------------------------------------\n"

 

#END

Chapter 10 - Python Command Line Arguments

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 10 - Command Line Parameters \n------------------------------------\n"

 

import sys

 

if(len(sys.argv) < 3):

 print "You should enter 2 argument"

elif(len(sys.argv) >=3):

 print "You entered %d argument " %(len(sys.argv)-1)

 print "The sys.argv values are : ", sys.argv

 print "sys.argv values in separte lines are...."

 for i in sys.argv:

  print i

 

print "\n--------------------------------------\n"

 

#END

Chapter 9 - Python Conditionals

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 9 - Conditionals \n------------------------------------\n"

 

a = input("Enter integer A : ")

b = input("Enter integer B : ")

if a == b:

 print "A and B are same"

elif a < b:

 print "B is larger"

else:

 print "A is larger"

 

print "\n--------------------------------------\n"

 

#END

Chapter 8 - Python Dictionary Datatypes

 

Step 1

 

Open any text editor (gedit,pico,vi,nano) then enter the following python script and save the file with .py extension.

 

#!/usr/bin/python

#Author : Jijo K Jose

 

print "\n------------------------------------\nChapter 8 - Dictionaries\n------------------------------------\n"

 

name = {'fname':'Jijo','mname':'K','lname':'Jose'}

 

print "\n", type(name)

 

print "\nDictonary Values : ", name

 

print "\nname['mname'] : " + name['mname']

 

print "\nAll keys -keys() : ", name.keys()

 

print "\nAll values -values() : ", name.values()

 

del name['mname']

print "\nDelete value del name['key'] : ", name

 

print "\nIterate through for loop items... -name.iteritems()\n"

for k,v in name.iteritems():

print k + "---->" + v

 

name['fname']= ['Jijo','Jibin','Jijan']

name['mname']= 'K'

name['lname']= 'Jose'

print "\nAdd more value to same key -name['fname']='value' : ", name

 

print "\n------------------------------------\n"

 

#END