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Project10:PythononWindows 15Points
CNIT123-Bowne Page
PAGE
4
of
NUMPAGES
4
WhatYouNeedforThisProject
AcomputerrunningWindows(anyversion)withInternetaccess.Youneedadministratorprivileges.Thiscanbeeitherarealorvirtualmachine.TheinstructionsbelowassumeyouareusingWindows7.
AcomputerrunningLinux(anyversion).TheinstructionsbelowassumeyouareusingUbuntu.
DownloadingandInstallingActivePython
Startabrowserandgoto/activepython/downloads
Clicktheblue"DownloadActivePython2.7.1forWindows(x86)"button,asshowntotherightonthispage.
Savethefileonyourdesktopandrunit.Installthesoftwarewithallthedefaultselections.
StartingActivePython
ClickStart,"PythonInteractiveShell".
“HelloWorld”inPython
A"PythonInteractiveShell".windowopens.Atthe>>>prompt,typeinthiscommand,thenpresstheEnterkey:
print"HelloWorld!"
Theresultistoprint“HelloWorld!”onthenextline,asshowntotherightonthispage.
MakingaCustomizedGreetinginInteractivePython
Atthe>>>prompt,typeinthiscommand,thenpresstheEnterkey:
name=raw_input("Whatisyourname:")
Thenextlineaskswhatyournameis.TypeinyournameandpressEnter.
Thenextlineshowsa>>>prompt.Yournamehasnowbeenstoredinthevariablename.Toseethat,atthe>>>prompt,typeinthiscommand,thenpresstheEnterkey:
printname
Youshouldseeyournameonthenextline,asshowntotherightonthispage.
Thevariablenamepersistsuntilyouchangeit,orclosePython.Youcanuseitagain.Toseethat,atthe>>>prompt,typeinthiscommand,thenpresstheEnterkey:
print“Hello”,name
Youshouldseeyourcustomizedgreeting.
Closethe"PythonInteractiveShell"window.
Makinghello.py:aCustomizedGreetingPythonScript
Theinteractiveshellisgoodforsimple,shortactions,butit’snotagoodwaytomakealongscript.Tocreateascript,clickStartandtypePYTHONintotheSearchbox.Thenclick"IDLE(PythonGUI)".A"PythonShell"windowopens.
Fromthemenubar,clickFile,"NewWindow".
Inthe*Untitled*box,accepttypeinthescriptshowntotherightonthispage.Thefirsttwolinesarecomments,indicatedbythe#sign.
Aftertypinginyourscript,fromthe*Untitled*menubar,clickFile,Save.SaveitintheDocumentslibrarywiththenamehello.PythonWinwilladdthefileextension.pytothefilename.
Torunthescript,fromthehellomenubar,clickRun,"RunModule".
Bluetextappearsinthe"PythonShell"windowaskingforyourname.TypeinyournameandpressEnter.
Themessage"Hello"followedbyyournameappearsonthenextline,asshowntotherightonthispage.
SavingtheScreenImage
PressthePrntScnkeytocopythedesktoptotheclipboard.StartPaintandpastetheimageintoit.SavetheimagewiththefilenameYour
Name
Proj
10a.
StartingaNetcatListenerinUbuntuLinux
Nowwe’llopenasocketfromPythononWindowstoNetcatonLinux,andtransferdatabothways.
StartyourUbuntuLinuxmachineandloginasusual.
FromtheUbuntumenubar,clickApplications,Accessories,Terminal.
IntheTerminalwindow,afterthe$prompt,enterthiscommand,thenpresstheEnterkey:
UbuntuIP:________________________
ifconfig
FindtheIPaddressforyoureth0interfaceandwriteitintheboxtotherightonthispage.
Wewillusenetcattolistenforinbounddata.Afterthe$prompt,typeinthiscommand,thenpresstheEnterkey:
nc–l4242
NotethatthefirstswitchisalowercaseL,notthenumeral1.Thiswillstartaprocesslisteningonport4242ontheLinuxmachine.
DisplayingtheListeningSocketsontheUbuntuMachine
Leavetheterminalwindowshowingthenccommandalone,andfromtheUbuntumenubar,clickApplications,Accessories,TerminaltoopenasecondTerminalwindow.
InthenewTerminalwindow,afterthe$prompt,enterthiscommand,thenpresstheEnterkey:
netstat–l--protocol=inet
Youshouldseealistofnetworkconnectionsthatarelistening,asshownbelowonthispage.Lookforthelinethatshows*:4242–that’sthenetcatlistener,waitingforanyincomingconnectionsonport4242.
EstablishingaTCPSocketinPythononWindows
Fromthemenubar,clickFile,"NewWindow".
Inthe*Untitled*box,typeinthescriptshownbelowonthispage.PutyourUbuntumachine’sIPaddressinthesecondline—that’sthenumberyouwroteintheboxonapreviouspageoftheseinstructions.
Aftertypinginyourscript,fromthe*Untitled*menubar,clickFile,Save.SaveitintheDocumentslibrarywiththenameYourNameProj10.PythonWinwilladdthefileextension.pytothefilename.
Torunthescript,fromthehellomenubar,clickRun,"RunModule".
NothinghappensontheWindowsmachine,unlessyouhavemadeatypographicalerrorinthescript.
ObservingtheSessionEstablishedontheWindowsMachine
LeavethePythonWinwindowsalonefornow.
FromtheWindowsdesktop,clickStart,Run.TypeinCMDandpresstheEnterkey.
IntheCommandPromptwindow,enterthiscommandandpresstheEnterkey:
netstat-n
Youshouldseealistofnetworkconnections.LookforthelinethatshowsaForeignAddressendingwith:4242(secondfromthebottominthefigurebelow).TheconnectionshouldshowaStateofESTABLISHED.
SavingtheScreenImage
PressthePrntScnkeytocopythedesktoptotheclipboard.Openpaintandpasteintheimage.SavetheimagewiththefilenameYour
Name
Proj
10b.
ReceivingandSendingDataWiththeUbuntuLinuxMachine
LeavethePythonWinwindowsaloneontheWindowsXPmachine.
ReturntotheUbuntumachine.LookattheTerminalwindowthatisrunningthenetcatlistener.YoushouldseethetextsentfromtheWindowsmachineonit:“HellofromWindows!”asshowntotherightonthispage.
ClickintheTerminalwindow,andtypeinthemessage“HifromLinux!”Thenpressthe
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