difference between python 2.7.3 and python 3.3 [closed]

Question

I have the following python code in python 2.7.3 , i had recently using a new laptop which has python 3.3 , I don't think I should downgrade back to python 2.7.3 . The code is

:-

nm = input(“enter file name “)

str = raw_input(“enter ur text here: \n”)

f = open(nm,”w”)

f.write(str)

f.close()

print “1.See the file\n”

print “2.Exit\n”

s = input(“enter ur choice “)

if s == 1 :

   fi  = open(nm,”r”)

   cont  = fi.readlines()

for i in cont:

    print i

else :

    print “thank you “ 

Please tell me what are the changes i should make so that it runs easily without any error .

Answer 1

• raw_input() does not exist in Python 3, use input() instead:

  str = input("enter ur text here: \n")
  

• input() does not evaluate the value it parses in Python 3, use eval(input()) instead:

  s = eval(input("enter ur choice "))
  

• print() is a function in Python 3 (it was a statement in Python 2), so you have to call it:

  print("1.See the file\n")
  print("2.Exit\n")
  
  print(i)
  
  print("thank you ")
  

Answer 2

raw_input() 

becomes

input()

and

print " "

becomes

print()

Hope this helped, but more information on converting can be found at http://python3porting.com/ :)