Practical Python Design Patterns - Pythonic Solutions to Common Problems

von: Wessel Badenhorst

Apress, 2017

ISBN: 9781484226803

Sprache: Englisch

352 Seiten, Download: 2774 KB

Format: PDF, auch als Online-Lesen

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Practical Python Design Patterns - Pythonic Solutions to Common Problems

	Table of Contents	5
	About the Author	12
	About the Technical Reviewer	13
	Acknowledgments	14
	Chapter 1: Before We Begin	15
	The Masters	15
	Becoming a Better Programmer	17
	Deliberate Practice	18
	Single Focus	19
	Rapid Feedback	19
	Stretch Yourself	20
	Stand on the Shoulders of Giants	21
	How Do You Do This?	21
	The Ability to Course Correct	22
	Systems Thinking	23
	Mental Models	23
	The Right Tools for the Job	24
	Design Patterns as a Concept	25
	What Makes a Design Pattern?	25
	Classification	26
	Creational	26
	Structural	26
	Behavioral	27
	The Tools We Will Be Using	27
	How to Read This Book	27
	Setting Up Your Python Environment	28
	On Linux	28
	On Mac	29
	On Windows	30
	VirtualEnv	31
	Editors	32
	Atom	33
	LightTable	33
	PyCharm	33
	Vim	33
	Emacs	34
	Sublime Text	34
	Summary	35
	Chapter 2: The Singleton Pattern	36
	The Problem	36
	Enter the Objects	42
	Cleaning It Up	45
	Exercises	48
	Chapter 3: The Prototype Pattern	49
	The Problem	49
	Beyond the First Steps	49
	Base for an Actual Game	50
	Implementing the Prototype Pattern	63
	Shallow Copy vs. Deep Copy	64
	Shallow Copy	65
	Dealing with Nested Structures	66
	Deep Copy	67
	Using What We Have Learned in Our Project	68
	Exercises	71
	Chapter 4: Factory Pattern	73
	Getting Started	73
	The Game Loop	75
	The Factory Method	80
	The Abstract Factory	82
	Summary	84
	Exercises	85
	Chapter 5: Builder Pattern	86
	Anti-Patterns	95
	A Note on Abstraction	100
	Exercises	101
	Chapter 6: Adapter Pattern	102
	Don’t Repeat Yourself (DRY)	104
	Separation of Concern	104
	Sample Problem	107
	Class Adapter	108
	Object Adapter Pattern	109
	Duck Typing	110
	Implementing the Adapter Pattern in the Real World	111
	Parting Shots	113
	Exercises	114
	Chapter 7: Decorator Pattern	115
	The Decorator Pattern	118
	Closures	123
	Retaining Function __name__ and __doc__ Attributes	124
	Decorating Classes	128
	Parting Shots	131
	Exercises	131
	Chapter 8: Facade Pattern	132
	Point of Sale Example	132
	Systems Evolution	136
	What Sets the Facade Pattern Apart	138
	Parting Shots	141
	Exercises	141
	Chapter 9: Proxy Pattern	142
	Memoization	142
	The Proxy Pattern	145
	Remote Proxy	148
	Virtual Proxy	148
	Protection Proxy	149
	Parting Shots	149
	Exercises	150
	Chapter 10: Chain of Responsibility Pattern	151
	Setting Up a WSGI Server	153
	Authentication Headers	154
	The Chain of Responsibility Pattern	158
	Implementing Chain of Responsibility in Our Project	162
	A More Pythonic Implementation	167
	Parting Shots	172
	Exercises	173
	Chapter 11: Command Pattern	174
	Controlling the Turtle	174
	The Command Pattern	176
	Parting Shots	184
	Exercises	184
	Chapter 12: Interpreter Pattern	185
	Domain-Specific Languages	185
	Advantages of DSLs	189
	Disadvantages of DSLs	189
	Composite Pattern	194
	Internal DSL Implementation Using the Composite Pattern	195
	Implementing the Interpreter Pattern	200
	Parting Shots	207
	Exercises	207
	Chapter 13: Iterator Pattern	209
	Python Internal Implementation of the Iterator Pattern	212
	Itertools	219
	Generator Functions	220
	Generator Expression	222
	Parting Shots	223
	Exercises	223
	Chapter 14: Observer Pattern	224
	Parting Shots	241
	Exercises	242
	Chapter 15: State Pattern	243
	State Pattern	246
	Parting Shots	251
	Exercises	252
	Chapter 16: Strategy Pattern	253
	Parting Shots	258
	Exercises	259
	Chapter 17: Template Method Pattern	260
	Parting Shots	272
	Exercises	272
	Chapter 18: Visitor Pattern	274
	The Visitor Pattern	287
	Parting Shots	299
	Exercises	300
	Chapter 19: Model-View-Controller Pattern	301
	Model-View-Controller Skeleton	305
	Controllers	307
	Models	308
	Views	308
	Bringing It All Together	309
	Parting Shots	315
	Exercises	316
	Chapter 20: Publish–Subscribe Pattern	317
	Distributed Message Sender	324
	Parting Shots	327
	Exercises	328
	Appendix ADesign Pattern Quick Reference	329
	Quick Checks for the Code	329
	Singleton	330
	Prototype	331
	Factory	331
	Builder	332
	Adapter	333
	Decorator	333
	Facade	334
	Proxy	335
	Chain of Responsibility	336
	Alternative	336
	Command	337
	Composite	338
	Interpreter	338
	Iterator	339
	Alternative	340
	Observer	340
	State	341
	Strategy	342
	Template Method	342
	Visitor	343
	Model–View–Controller	344
	Publisher–Subscriber	345
	Final Words	346
	Index	347

Practical Python Design Patterns - Pythonic Solutions to Common Problems

von: Wessel Badenhorst

Practical Python Design Patterns - Pythonic Solutions to Common Problems

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