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Exercises in Programming Style
book

Exercises in Programming Style

by Cristina Videira Lopes
November 2015
Intermediate to advanced content levelIntermediate to advanced
304 pages
5h 23m
English
Chapman and Hall/CRC
Content preview from Exercises in Programming Style

Chapter 24

Quarantine

image

24.1 Constraints

  • Core program functions have no side effects of any kind, including IO.
  • All IO actions must be contained in computation sequences that are clearly separated from the pure functions.
  • All sequences that have IO must be called from the main program.

24.2 A Program in this Style

  1 #!/usr/bin/env python
  2 import sys, re, operator, string
  3
  4 #
  5 # The Quarantine class for this example
  6 #
  7 class TFQuarantine:
  8 def __init__(self, func):
  9  self._funcs = [func]
 10
 11 def bind(self, func):
 12  self._funcs.append(func)
 13  return self
 14
 15 def execute(self):
 16  def guard_callable(v):
 17    return v() if hasattr(v, ...
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Publisher Resources

ISBN: 9781482227376