mertz d. - functional programming in python - 2015.pdf

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Functional
Programming
in Python
David Mertz
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©2015 O’Reilly Media, Inc. The O’Reilly logo is a registered trademark of O’Reilly Media, Inc. #15305
Functional Programming
in Python
David Mertz
Functional Programming in Python
by David Mertz
Copyright © 2015 O’Reilly Media, Inc. All rights reserved.
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May 2015:
2015-05-27:
First Edition
First Release
Revision History for the First Edition
The O’Reilly logo is a registered trademark of O’Reilly Media, Inc.
Functional Pro‐
gramming in Python,
the cover image, and related trade dress are trademarks of
O’Reilly Media, Inc.
While the publisher and the author have used good faith efforts to ensure that the
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978-1-491-92856-1
[LSI]
Table of Contents
Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
(Avoiding) Flow Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Encapsulation
Comprehensions
Recursion
Eliminating Loops
1
2
5
7
Callables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Named Functions and Lambdas
Closures and Callable Instances
Methods of Classes
Multiple Dispatch
The Iterator Protocol
Module: itertools
12
13
15
19
27
29
Lazy Evaluation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Higher-Order Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Utility Higher-Order Functions
The operator Module
The functools Module
Decorators
35
36
36
37
iii

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