Beginning Python - From Novice to Professional

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CHAPTER 24 ■ PROJECT 5: A VIRTUAL TEA PARTY 467 and the user dilbert connected to the server using the command telnet localhost 5005 Figure 24-1. A sample chat session Listing 24-6. A Slightly More Complicated Chat Server (chatserver.py) from asyncore import dispatcher from asynchat import async_chat import socket, asyncore PORT = 5005 NAME = 'TestChat' class EndSession(Exception): pass class CommandHandler: """ Simple command handler similar to cmd.Cmd from the standard library. """
468 CHAPTER 24 ■ PROJECT 5: A VIRTUAL TEA PARTY def unknown(self, session, cmd): 'Respond to an unknown command' session.push('Unknown command: %s\r\n' % cmd) def handle(self, session, line): 'Handle a received line from a given session' if not line.strip(): return # Split off the command: parts = line.split(' ', 1) cmd = parts[0] try: line = parts[1].strip() except IndexError: line = '' # Try to find a handler: meth = getattr(self, 'do_'+cmd, None) # If it is callable... if callable(meth): # ...call it: meth(session, line) else: # Otherwise, respond to the unknown command: self.unknown(session, cmd) class Room(CommandHandler): """ A generic environment that may contain one or more users (sessions). It takes care of basic command handling and broadcasting. """ def __init__(self, server): self.server = server self.sessions = [] def add(self, session): 'A session (user) has entered the room' self.sessions.append(session) def remove(self, session): 'A session (user) has left the room' self.sessions.remove(session) def broadcast(self, line): 'Send a line to all sessions in the room' for session in self.sessions: session.push(line)
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Beginning Python From Novice to Pro
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For Ranveig
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■CHAPTER 23 Project 4: In the New
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viii ■CONTENTS Strings . . . . .
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x ■CONTENTS ■CHAPTER 5 Conditio
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xii ■CONTENTS ■CHAPTER 8 Except
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xiv ■CONTENTS ■CHAPTER 11 Files
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xvi ■CONTENTS Dynamic Web Pages w
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xx ■CONTENTS Second Implementatio
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xxii ■CONTENTS Preparations . . .
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About the Technical Reviewer ■JER
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Introduction A C program is like a
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CHAPTER 1 ■ ■ ■ Instant Hacki
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CHAPTER 1 ■ INSTANT HACKING: THE
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82 CHAPTER 5 ■ CONDITIONALS, LOOP
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110 CHAPTER 6 ■ ABSTRACTION But w
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114 CHAPTER 6 ■ ABSTRACTION Can I
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116 CHAPTER 6 ■ ABSTRACTION stora
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122 CHAPTER 6 ■ ABSTRACTION >>> p
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124 CHAPTER 6 ■ ABSTRACTION Also,
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126 CHAPTER 6 ■ ABSTRACTION Feel
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128 CHAPTER 6 ■ ABSTRACTION ■No
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130 CHAPTER 6 ■ ABSTRACTION So yo
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134 CHAPTER 6 ■ ABSTRACTION LAMBD
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136 CHAPTER 6 ■ ABSTRACTION In th
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138 CHAPTER 6 ■ ABSTRACTION Scope
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140 CHAPTER 7 ■ MORE ABSTRACTION
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160 CHAPTER 8 ■ EXCEPTIONS >>> im
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CHAPTER 9 ■ ■ ■ Magic Methods
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CHAPTER 9 ■ MAGIC METHODS, PROPER
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CHAPTER 10 ■ ■ ■ Batteries In
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256 CHAPTER 11 ■ FILES AND STUFF
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270 CHAPTER 12 ■ GRAPHICAL USER I
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298 CHAPTER 14 ■ NETWORK PROGRAMM
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314 CHAPTER 15 ■ PYTHON AND THE W
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358 CHAPTER 17 ■ EXTENDING PYTHON
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CHAPTER 18 ■ ■ ■ Packaging Yo
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392 CHAPTER 20 ■ PROJECT 1: INSTA
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518 CHAPTER 28 ■ PROJECT 9: FILE
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APPENDIX A ■ ■ ■ The Short Ve
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558 APPENDIX B ■ PYTHON REFERENCE
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572 APPENDIX C ■ ONLINE RESOURCES
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Index ■Symbols - operator 558 !=
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■INDEX 579 cmd module 252, 501 Cm
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■INDEX 581 get method 74-75 has_k
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■INDEX 583 ■F Factory class twi
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■INDEX 585 finding conflicts 197
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■INDEX 587 initialization 38 nami
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■INDEX 589 localtime function tim
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■INDEX 591 nesting blocks 88 Netw
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■INDEX 593 playful programming 38
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■INDEX 595 Python C API 365 hand-
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■INDEX 601 TestCase class methods
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■INDEX 603 further exploration 47
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