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Next, call the accept method of the returned object. This method waits until a client connects to the port youspecified and then returns a connection object that represents the connection to that client.#!/usr/bin/pythonimport socket# This is server.py file# Import socket modules = socket.socket()# Create a socket objecthost = socket.gethostname() # Get local machine nameport = 12345# Reserve a port for your service.s.bind((host, port)) # Bind to the ports.listen(5)# Now wait for client connection.while True:c, addr = s.accept() # Establish connection with client.print 'Got connection from', addrc.send('Thank you for connecting')c.close()# Close the connectionA Simple Client: Now, we will write a very simple client program, which will open a connection to a given port 12345 and givenhost. This is very simple to create a socket client using Python's socket module function.The socket.connect(hosname, port ) opens a TCP connection to hostname on the port. Once you have asocket open, you can read from it like any IO object. When done, remember to close it, as you would close a file.The following code is a very simple client that connects to a given host and port, reads any available data fromthe socket, and then exits:#!/usr/bin/pythonimport socket# This is client.py file# Import socket modules = socket.socket()# Create a socket objecthost = socket.gethostname() # Get local machine nameport = 12345# Reserve a port for your service.s.connect((host, port))print s.recv(1024)s.close# Close the socket when doneNow, run this server.py in background and then run above client.py to see the result.# Following would start a server in background.$ python server.py &# Once server is started run client as follows:$ python client.pyThis would produce the following result:Got connection from ('127.0.0.1', 48437)Thank you for connectingPython Internet modules A list of some important modules, which could be used in Python Network/Internet programming.TUTORIALS POINT Simply Easy Learning
Protocol Common function Port No Python moduleHTTP Web pages 80 httplib, urllib, xmlrpclibNNTP Usenet news 119 nntplibFTP File transfers 20 ftplib, urllibSMTP Sending email 25 smtplibPOP3 Fetching email 110 poplibIMAP4 Fetching email 143 imaplibTelnet Command lines 23 telnetlibGopher Document transfers 70 gopherlib, urllibPlease check all the libraries mentioned above to work with FTP, SMTP, POP, and IMAP protocols.Further Readings: I have given you a quick start with Socket Programming. It's a big subject, so its recommended togo through the following link to find more details on:• Unix Socket Programming.• Python Socket Library and Modules.TUTORIALS POINT Simply Easy Learning
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Python Tutorial
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ABOUT THE TUTORIALPython TutorialPy
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Description .......................
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Parameters ........................
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Locating Modules: .................
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Description .......................
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Return Value ......................
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Example ...........................
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Parameters ........................
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Regular-expression Modifiers - Opti
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Starting a New Thread: ............
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Example: ..........................
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CHAPTER1Python OverviewPython is a
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CHAPTER2Python EnvironmentBefore we
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• To use this installer python-XY
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-c cmd run Python script sent in as
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This will produce the following res
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file_name = raw_input("Enter filena
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$ python -husage: python [option] .
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print 'Input file is "', inputfilep
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Here, an integer object is created
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Python Lists: Lists are the most v
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FunctionDescriptionint(x [,base])Co
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CHAPTER5Python Basic OperatorsWhat
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Line 4 - Value of c is 2Line 5 - Va
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Line 5 - a is greater than bLine 6
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| Binary OR Operator copies a bit i
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else:print "Line 3 - a and b are tr
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if ( id(a) == id(b) ):print "Line 2
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When you execute the above program,
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if statementsif...else statementsne
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Example: #!/usr/bin/pythonvar1 = 10
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else:print "Could not find true exp
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Loop Typewhile loopfor loopDescript
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num = raw_input("Enter a number :")
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Good bye!Iterating by Sequence I
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11 is prime13 is prime17 is prime19
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continue statement The continue st
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CHAPTER8Python NumbersNumber data t
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max(x1, x2,...)min(x1, x2,...)modf(
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Syntax Following is the syntax for
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import math# This will import math
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import mathmath.log10( x )Note: Thi
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modf(x) Description The method modf
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round( x [, n] )Parameters • x --
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Return Value This method returns a
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seed([x]) Description The method se
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asin(x)Note: This function is not a
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print "atan2(-10,10) : ", math.atan
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Note: This function is not accessib
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import mathprint "degrees(3) : ", m
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CHAPTER9Python StringsStrings are a
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+ Concatenation - Adds values on ei
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TAB ( \t ) and they will show up th
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str = "this is string example....wo
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Return Value This method returns a
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Description The method expandtabs()
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Traceback (most recent call last):F
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Let us compile and run the above pr
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str = "This is string example....wo
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str = "-";seq = ("a", "b", "c"); #
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lstrip() Description The method lst
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Max character: xmin(str) Descriptio
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str = "this is really a string exam
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Parameters • chars -- You can sup
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Parameters• str -- This is the st
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Parameters • NAReturn Value This
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Example The following example shows
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CHAPTER10Python ListsThe most basic
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Python Expression Results Descripti
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list( seq )Parameters • seq -- Th
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Return Value If elements are of th
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list.insert(index, obj)Parameters
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CHAPTER11Python TuplesAtuple is a s
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len((1, 2, 3)) 3 Length(1, 2, 3) +
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-11-1len(tuple) Description The met
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min value element : 200tuple(seq) D
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#!/usr/bin/pythondict = {'Name': 'Z
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34str(dict)Produces a printable str
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type(variable) Description The meth
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Return Value This method does not
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CHAPTER13Python Date & TimeApython
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#!/usr/bin/pythonimport time;localt
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import timeprint "time.altzone %d "
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Parameters • sec -- These are the
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• %w - day of the week as a decim
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time.time( ) Description The metho
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2time.tznameAttribute time.tzname i
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CHAPTER14Python FunctionAfunction i
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#!/usr/bin/python# Function definit
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return;# Now you can call printinfo
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Inside the function : 30Outside the
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A module is loaded only once, regar
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'sqrt', 'tan', 'tanh']Here, the spe
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CHAPTER16Python Files I/OThis chapt
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rb+WWbw+wb+AAba+ab+Opens a file for
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fo.write( "Python is a great langua
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EXAMPLE: Following is the example t
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operations from the operating syste
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# Close opened filefo.close()Let us
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Parameters • NAReturn Value This
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Parameters • offset -- This is th
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Parameters • size -- If this opti
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Description The method writelines()
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53545556575859606162os.symlink(src,
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• stat.S_IRGRP: Read by group.•
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os.chroot("/tmp/usr")print "Changed
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Parameters • fd -- This is the or
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import os, sys# First go to the "/v
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Description The method fchown() cha
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Description The method fdopen() ret
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{'PC_MAX_INPUT': 2, 'PC_VDISABLE':
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# Open a filefd = os.open( "foo.txt
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print "Current working dir : %s" %
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path = "/var/www/html/foo.txt"fd =
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_vti_txtrobots.txtitemlistingresume
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# Close opened fileos.close( fd )#
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dev_num = os.makedev(major_dnum, mi
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-rw-------. 1 root root 0 Apr 30 02
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os.pathconf(path, name) Descriptio
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Description The method popen() open
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# !/usr/bin/pythonimport ossrc = '/
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# stat informationstatinfo = os.sta
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Description The method tcgetpgrp()
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os.tempnam(dir, prefix)Parameters
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Description The method ttyname() re
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Page 369 and 370: Tkinter Widgets Tkinter provides v
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mark_gravity(mark [,gravity])Return
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Methods & Descriptiondeiconify()Dis
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disabledbackgrounddisabledforegroun
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bgbdThe color of the slider and arr
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fontheightlabelAnchorhighlightbackg
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Standard attributes:Let's take a l
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• family: The font family name as
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B2.pack()B3.pack()B4.pack()B5.pack(
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• "heart"• "heart"• "man"•
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The grid() Method This geometry m
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CHAPTERPython Further Extensions27A
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This table needs to be terminated w
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Passing Function Parameters: Beca
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return (a + b)You can return two va
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CHAPTER28Python Tools/UtilitiesThe
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The profile Module: The profile m
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