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Newsgroups: comp.lang.python
Date: Wed, 19 Sep 2012 22:13:29 -0700 (PDT)
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Subject: Re: using text file to get ip address from hostname
From: Dan Katorza <dkatorza@gmail.com>
To: comp.lang.python@googlegroups.com
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Xref: csiph.com comp.lang.python:29542

=D7=91=D7=AA=D7=90=D7=A8=D7=99=D7=9A =D7=99=D7=95=D7=9D =D7=A8=D7=91=D7=99=
=D7=A2=D7=99, 19 =D7=91=D7=A1=D7=A4=D7=98=D7=9E=D7=91=D7=A8 2012 15:28:23 U=
TC+3, =D7=9E=D7=90=D7=AA Dan Katorza:
> =D7=91=D7=AA=D7=90=D7=A8=D7=99=D7=9A =D7=99=D7=95=D7=9D =D7=A8=D7=91=D7=
=99=D7=A2=D7=99, 19 =D7=91=D7=A1=D7=A4=D7=98=D7=9E=D7=91=D7=A8 2012 12:11:0=
4 UTC+3, =D7=9E=D7=90=D7=AA Dan Katorza:
>=20
> > =D7=91=D7=AA=D7=90=D7=A8=D7=99=D7=9A =D7=99=D7=95=D7=9D =D7=A8=D7=91=D7=
=99=D7=A2=D7=99, 19 =D7=91=D7=A1=D7=A4=D7=98=D7=9E=D7=91=D7=A8 2012 11:50:5=
6 UTC+3, =D7=9E=D7=90=D7=AA Dan Katorza:
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> >=20
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> > > =D7=91=D7=AA=D7=90=D7=A8=D7=99=D7=9A =D7=99=D7=95=D7=9D =D7=A8=D7=91=
=D7=99=D7=A2=D7=99, 19 =D7=91=D7=A1=D7=A4=D7=98=D7=9E=D7=91=D7=A8 2012 11:1=
4:29 UTC+3, =D7=9E=D7=90=D7=AA Chris Angelico:
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> > > > On Wed, Sep 19, 2012 at 5:41 PM, Dan Katorza <dkatorza@gmail.com> w=
rote:
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> > > > > Hello again,
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> > > > > I have another question and i hope you will understand me..
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> > > > > Is there any option where you can set the program to go back to l=
ets say the top of the code?
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> > > > > I mean if the program finished the operation and i want to stay i=
n the program and go back ro the start.
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> > > > > after any operation i want the option to do it again , go back to=
 the main menu or full exit from the program, and i want it every time.
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> > > > > i hope i'm clear :)
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> > > > Yep! Look up the docs and tutorial on "control flow" and "looping
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> > > > constructs". Sounds like what you want here is a 'while' loop.
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> > > > ChrisA
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> > > Hi Chris,
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> > > this is my code:
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> > > #!/usr/bin/env python
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> > > #Get the IP Address
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> > > import sys, socket
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> > > print ("\n\n#########################################################=
")
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> > > print ("#                Get IP from Host v 1.0                 #")
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> > > print ("#########################################################")
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> > > print ("#             Choose from the options below             #")
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> > > print ("#          1- url , 2-File(Text file only.txt)          #")
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> > > print ("#########################################################\n")
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> > > mchoice =3D int(raw_input("Please enter your choice> "))
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> > > while mchoice !=3D1 and  mchoice !=3D2:
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> > >     print("{0} is not a menu option.".format(mchoice))
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> > >     mchoice =3D int(raw_input("Please try again> "))
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> > > if mchoice =3D=3D 2:
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> > >   filename =3D raw_input("Hello, please enter file name here> ")
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> > >   if filename.endswith(".txt"):
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> > >    try:
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> > >     infile =3D open(filename)
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> > >    except EnvironmentError as e:
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> > >     print(e)
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> > >     sys.exit(1)
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> > >    print("\nFile {0} exists!".format(filename))
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> > >    print("\nGetting IP addresses for hosts")
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> > >    print("\n")
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> > >   else:
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> > >        print("{0} is not a Text file.".format(filename))
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> > >        sys.exit(1)
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> > >   for line in infile:
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> > >     hostname =3D line.strip()
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> > >     try:
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> > >         ip_address =3D socket.gethostbyname(hostname)
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> > >     except EnvironmentError as e:
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> > >         print("Couldn't find IP address for {0}: {1}".format(hostname=
, e))
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> > >         continue
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> > >     print("IP address for {0} is {1}.".format(hostname, ip_address))
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> > >   else:
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> > >     print ("\nFinished the operation")
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> > > if mchoice =3D=3D 1:
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> > >   murl =3D raw_input("Enter URL here> ")
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> > >   try:
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> > >       print("Checking URL...")
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> > >       ip_address =3D socket.gethostbyname(murl)
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> > >   except EnvironmentError as d:
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> > >       print(d)
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> > >       sys.exit(1)
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> > >   print("Valid URL")
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> > >   print("\nIP address for {0} is {1}.".format(murl, ip_address))
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> > >   print ("\nFinished the operation")
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> > > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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> > > now where it says Finsihed the operation i want it to show (another s=
earch /main menu/exit program)
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> > > i know about the while loop , but forgive me i just don't have a clue=
 how to use it for this situation.
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> > > i don't want you to give me the code:) just the idea.
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> > > i did read the section about the while loop but still i do not know h=
ow to use it in this situation.
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> > > thanks.
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> > o.k a giant while loop :)
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> > thanks.
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> hi,=20
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> found a solution,
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> it's not quite like Chris advised but it works.
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> #!/usr/bin/env python
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> #Get the IP Address
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> import sys, socket, os
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> def restart_program():
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>     python =3D sys.executable
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>     os.execl(python, python, * sys.argv)
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> print ("\n\n#########################################################")
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> print ("#                Get IP from Host v 1.0                 #")
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> print ("#########################################################")
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> print ("#             Choose from the options below             #")
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> print ("#          1- url , 2-File(Text file only.txt)          #")
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> print ("#########################################################\n")
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> mchoice =3D int(raw_input("Please enter your choice> "))
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> while mchoice !=3D1 and  mchoice !=3D2:
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>     print("{0} is not a menu option.".format(mchoice))
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>     mchoice =3D int(raw_input("Please try again> "))
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> while mchoice =3D=3D 2:
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>     filename =3D raw_input("Please enter file name here> ")
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>     if filename.endswith(".txt"):
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>         try:
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>             infile =3D open(filename)
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>         except EnvironmentError as e:
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>             print(e)
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>             sys.exit(1)
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>         print("\nFile {0} exists!".format(filename))
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>         print("\nGetting IP addresses for hosts")
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>         print("\n")
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>     else:
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>         print("{0} is not a Text file.".format(filename))
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>         sys.exit(1)
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>     for line in infile:
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>         hostname =3D line.strip()
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>         try:
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>             ip_address =3D socket.gethostbyname(hostname)
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>         except EnvironmentError as e:
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>             print("Couldn't find IP address for {0}: {1}".format(hostname=
, e))
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>             continue
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>         print("IP address for {0} is {1}.".format(hostname, ip_address))
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>     else:
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>         print ("\nFinished the operation")
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>         print ("A=3Danother search, M=3Dmain menu, E=3Dexit")
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>         waction=3Draw_input("Please choose your action > ")
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>         while waction !=3D'A' and waction !=3D'M' and waction !=3D'E':
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>             print("{0} is not a valid action.".format(waction))
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>             waction=3Draw_input("Please try again> ")
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>         if waction =3D=3D'E':
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>             sys.exit(1)
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>         if waction =3D=3D'A':
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>             continue
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>         if waction =3D=3D'M':
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>             print ("#####################################################=
####")
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>             print ("#             Choose from the options below          =
   #")
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>             print ("#          1- url , 2-File(Text file only.txt)       =
   #")
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>             print ("#####################################################=
####\n")
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>             mchoice =3D int(raw_input("Please enter your choice> "))
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>             while mchoice !=3D1 and  mchoice !=3D2:
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>                 print("{0} is not a menu option.".format(mchoice))
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>                 mchoice =3D int(raw_input("Please try again> "))
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> while mchoice =3D=3D 1:
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>     murl =3D raw_input("Enter URL here> ")
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>     try:
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>         print("Checking URL...")
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>         ip_address =3D socket.gethostbyname(murl)
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>     except EnvironmentError as d:
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>         print(d)
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>         sys.exit(1)
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>     print("Valid URL")
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>     print("\nIP address for {0} is {1}.".format(murl, ip_address))
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>     print ("\nFinished the operation")
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>     print ("A=3Danother search, M=3Dmain menu, E=3Dexit")
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>     waction=3Draw_input("Please choose your action > ")
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>     while waction !=3D'A' and waction !=3D'M' and waction !=3D'E':
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>         print("{0} is not a valid action.".format(waction))
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>         waction=3Draw_input("Please try again> ")
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>     if waction =3D=3D'E':
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>         sys.exit(1)
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>     if waction =3D=3D'A':
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>         continue
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>     if waction =3D=3D'M':
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>         restart_program()

Hi Dave,
thanks for your comment.
please note this is only my 6th day of programing in any language ever and =
i'm tutoring  my self.
I know this code is too long and lousy for a simple task, but i guess this =
is part of my learning process.
3 days ago i already figured out that is too long and probably there is bet=
ter solution, but I decided to try and work it out anyway just for learning=
 and dealing with a bad code.
anyway what i realized is before i want to write a program/task , i need to=
 write what i want before and plan it ahead.

anyway thanks everyone.