Beginning Python - From Novice to Professional

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APPENDIX B ■ ■ ■ Python Reference This is not a full Python reference by far—you can find that in the standard Python documentation (http://python.org/doc/ref). Rather, this is a handy “cheat sheet” that can be useful for refreshing your memory as you start out programming in Python. Expressions This section summarizes Python expressions. Table B-1 lists the most important basic (literal) values in Python; Table B-2 lists the Python operators, along with their precedence (those with high precedence are evaluated before those with low precedence); Table B-3 describes some of the most important built-in functions; Tables B-4 through B-6 describe the list methods, dictionary methods, and string methods, respectively. Table B-1. Basic (Literal) Values Type Description Syntax Samples Integer Numbers without a fractional part 42 Long integer Large integer numbers 42L Float Numbers with a fractional part 42.5, 42.5e-2 Complex Sum of a real (integer or float) and imaginary number 38 + 4j, 42j String An immutable sequence of characters 'foo', "bar", """baz""", r'\n' Unicode An immutable sequence of Unicode characters u'foo', u"bar", u"""baz""" 557
558 APPENDIX B ■ PYTHON REFERENCE Table B-2. Operators Operator Description Precedence lambda Lambda expression 1 or Logical or 2 and Logical and 3 not Logical negation 4 in Membership test 5 not in Negative membership test 5 is Identity test 6 is not Negative identity test 6 < Less than 7 > Greater than 7 = Greater than or equal to 7 == Equal to 7 != Not equal to 7 | Bitwise or 8 ^ Bitwise exclusive or 9 & Bitwise and 10 > Right shift 11 + Addition 12 - Subtraction 12 * Multiplication 13 / Division 13 % Remainder 13 + Unary identity 14 - Unary negation 14 ~ Bitwise complement 15 ** Exponentiation 16 x.attribute Attribute reference 17 x[index] Subscription 18 x[index1:index2[:index3]] Slicing 19 f(args...) Function call 20
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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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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 2 ■ LISTS AND TUPLES 33 I
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CHAPTER 3 ■ WORKING WITH STRINGS
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82 CHAPTER 5 ■ CONDITIONALS, LOOP
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110 CHAPTER 6 ■ ABSTRACTION But w
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116 CHAPTER 6 ■ ABSTRACTION stora
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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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134 CHAPTER 6 ■ ABSTRACTION LAMBD
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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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256 CHAPTER 11 ■ FILES AND STUFF
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270 CHAPTER 12 ■ GRAPHICAL USER I
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CHAPTER 13 ■ DATABASE SUPPORT 287
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298 CHAPTER 14 ■ NETWORK PROGRAMM
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358 CHAPTER 17 ■ EXTENDING PYTHON
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CHAPTER 18 ■ ■ ■ Packaging Yo
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Page 606 and 607: Index ■Symbols - operator 558 !=
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