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文件名称：Python for Software Design - How to Think Like a Computer Scientist (2009).pdf
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更新时间：2022-09-07 16:37:45
Python Software Design Computer Scientist
Contents
Preface
pagexi
1
TheWayoftheProgram
1
1.1
ThePythonProgrammingLanguage
1
1.2
WhatIsaProgram?
3
1.3
WhatIsDebugging?
3
1.3.1SyntaxErrors
3
1.3.2RuntimeErrors
4
1.3.3SemanticErrors
4
1.3.4ExperimentalDebugging
4
1.4
FormalandNaturalLanguages
5
1.5
TheFirstProgram
6
1.6
Debugging
7
1.7
Glossary
8
1.8
Exercises
9
2
Variables,Expressions,andStatements
10
2.1
ValuesandTypes
10
2.2
Variables
11
2.3
VariableNamesandKeywords
13
2.4
Statements
13
2.5
OperatorsandOperands
14
2.6
Expressions
15
2.7
OrderofOperations
15
2.8
StringOperations
16
2.9
Comments
17
2.10Debugging
17
2.11Glossary
18
2.12Exercises
19
v
vi
Contents
3
Functions
21
3.1
FunctionCalls
21
3.2
TypeConversionFunctions
21
3.3
MathFunctions
22
3.4
Composition
23
3.5
AddingNewFunctions
24
3.6
DefinitionsandUses
26
3.7
FlowofExecution
26
3.8
ParametersandArguments
27
3.9
VariablesandParametersAreLocal
28
3.10StackDiagrams
29
3.11FruitfulFunctionsandVoidFunctions
30
3.12WhyFunctions?
31
3.13Debugging
31
3.14Glossary
32
3.15Exercises
33
4
CaseStudy:InterfaceDesign
35
4.1
TurtleWorld
35
4.2
SimpleRepetition
36
4.3
Exercises
37
4.4
Encapsulation
38
4.5
Generalization
39
4.6
InterfaceDesign
40
4.7
Refactoring
41
4.8
ADevelopmentPlan
42
4.9
Docstring
43
4.10Debugging
43
4.11Glossary
44
4.12Exercises
44
5
ConditionalsandRecursion
46
5.1
ModulusOperator
46
5.2
BooleanExpressions
46
5.3
LogicalOperators
47
5.4
ConditionalExecution
48
5.5
AlternativeExecution
48
5.6
ChainedConditionals
49
5.7
NestedConditionals
49
5.8
Recursion
50
5.9
StackDiagramsforRecursiveFunctions
52
5.10InfiniteRecursion
52
5.11KeyboardInput
53
5.12Debugging
54
5.13Glossary
55
5.14Exercises
56
Contents
vii
6
FruitfulFunctions
59
6.1
ReturnValues
59
6.2
IncrementalDevelopment
60
6.3
Composition
63
6.4
BooleanFunctions
64
6.5
MoreRecursion
65
6.6
LeapofFaith
67
6.7
OneMoreExample
67
6.8
CheckingTypes
68
6.9
Debugging
69
6.10Glossary
70
6.11Exercises
71
7
Iteration
73
7.1
MultipleAssignment
73
7.2
UpdatingVariables
74
7.3
ThewhileStatement
75
7.4
break
76
7.5
SquareRoots
77
7.6
Algorithms
79
7.7
Debugging
79
7.8
Glossary
80
7.9
Exercises
80
8
Strings
82
8.1
AStringIsaSequence
82
8.2
len
83
8.3
TraversalwithaforLoop
83
8.4
StringSlices
85
8.5
StringsAreImmutable
86
8.6
Searching
86
8.7
LoopingandCounting
87
8.8
stringMethods
87
8.9
TheinOperator
89
8.10StringComparison
89
8.11Debugging
90
8.12Glossary
92
8.13Exercises
92
9
CaseStudy:WordPlay
95
9.1
ReadingWordLists
95
9.2
Exercises
96
9.3
Search
97
9.4
LoopingwithIndices
99
9.5
Debugging
100
9.6
Glossary
101
9.7
Exercises
101
viii
Contents
10
Lists
103
10.1
AListIsaSequence
103
10.2
ListsAreMutable
104
10.3
TraversingaList
105
10.4
ListOperations
106
10.5
ListSlices
106
10.6
ListMethods
107
10.7
Map,Filter,andReduce
108
10.8
DeletingElements
109
10.9
ListsandStrings
110
10.10ObjectsandValues
111
10.11Aliasing
113
10.12ListArguments
113
10.13Debugging
115
10.14Glossary
116
10.15Exercises
117
11
Dictionaries
119
11.1
DictionaryasaSetofCounters
121
11.2
LoopingandDictionaries
123
11.3
ReverseLookup
123
11.4
DictionariesandLists
124
11.5
Memos
126
11.6
GlobalVariables
128
11.7
LongIntegers
129
11.8
Debugging
130
11.9
Glossary
131
11.10Exercises
131
12
Tuples
133
12.1
TuplesAreImmutable
133
12.2
TupleAssignment
135
12.3
TuplesasReturnValues
136
12.4
Variable-LengthArgumentTuples
136
12.5
ListsandTuples
138
12.6
DictionariesandTuples
139
12.7
ComparingTuples
141
12.8
SequencesofSequences
142
12.9
Debugging
143
12.10Glossary
144
12.11Exercises
145
13
CaseStudy:DataStructureSelection
147
13.1
WordFrequencyAnalysis
147
13.2
RandomNumbers
148
13.3
WordHistogram
149
13.4
MostCommonWords
151
Contents
ix
13.5
OptionalParameters
152
13.6
DictionarySubtraction
152
13.7
RandomWords
153
13.8
MarkovAnalysis
154
13.9
DataStructures
155
13.10Debugging
157
13.11Glossary
158
13.12Exercises
158
14
Files
159
14.1
Persistence
159
14.2
ReadingandWriting
159
14.3
FormatOperator
160
14.4
FilenamesandPaths
161
14.5
CatchingExceptions
163
14.6
Databases
164
14.7
Pickling
165
14.8
Pipes
166
14.9
WritingModules
167
14.10Debugging
168
14.11Glossary
169
14.12Exercises
169
15
ClassesandObjects
172
15.1
User-DefinedTypes
172
15.2
Attributes
173
15.3
Rectangles
174
15.4
InstancesasReturnValues
176
15.5
ObjectsAreMutable
176
15.6
Copying
177
15.7
Debugging
179
15.8
Glossary
179
15.9
Exercises
180
16
ClassesandFunctions
182
16.1
Time
182
16.2
PureFunctions
183
16.3
Modifiers
184
16.4
PrototypingversusPlanning
185
16.5
Debugging
187
16.6
Glossary
188
16.7
Exercises
188
17
ClassesandMethods
189
17.1
Object-OrientedFeatures
189
17.2
PrintingObjects
190
17.3
AnotherExample
192
17.4
AMoreComplicatedExample
192
x
Contents
17.5
TheInitMethod
193
17.6
The__str__method
194
17.7
OperatorOverloading
195
17.8
Type-BasedDispatch
195
17.9
Polymorphism
197
17.10Debugging
198
17.11Glossary
199
17.12Exercises
199
18
Inheritance
201
18.1
CardObjects
201
18.2
ClassAttributes
202
18.3
ComparingCards
204
18.4
Decks
205
18.5
PrintingtheDeck
205
18.6
Add,Remove,Shuffle,andSort
206
18.7
Inheritance
207
18.8
ClassDiagrams
209
18.9
Debugging
210
18.10Glossary
211
18.11Exercises
212
19
CaseStudy:Tkinter
214
19.1
GUI
214
19.2
ButtonsandCallbacks
215
19.3
CanvasWidgets
216
19.4
CoordinateSequences
217
19.5
MoreWidgets
218
19.6
PackingWidgets
220
19.7
MenusandCallables
223
19.8
Binding
223
19.9
Debugging
226
19.10Glossary
227
19.11Exercises
228
Appendix
231
Index
241