Update docs w.r.t. PEP 3100 changes -- patch for GHOP by Dan Finnie.

This commit is contained in:
Georg Brandl 2008-02-01 11:56:49 +00:00
parent f25ef50549
commit f694518331
48 changed files with 395 additions and 534 deletions

View file

@ -811,7 +811,7 @@ Examples::
260
>>> from math import pi, sin
>>> sine_table = dict((x, sin(x*pi/180)) for x in range(0, 91))
>>> sine_table = {x: sin(x*pi/180) for x in range(0, 91)}
>>> unique_words = set(word for line in page for word in line.split())

View file

@ -273,7 +273,7 @@ Here are some nested for loops and other fancy behavior::
List comprehensions can be applied to complex expressions and nested functions::
>>> [str(round(355/113.0, i)) for i in range(1, 6)]
>>> [str(round(355/113, i)) for i in range(1, 6)]
['3.1', '3.14', '3.142', '3.1416', '3.14159']
@ -437,6 +437,9 @@ Here is a brief demonstration::
>>> fruit = set(basket) # create a set without duplicates
>>> fruit
{'orange', 'pear', 'apple', 'banana'}
>>> fruit = {'orange', 'apple'} # {} syntax is equivalent to [] for lists
>>> fruit
{'orange', 'apple'}
>>> 'orange' in fruit # fast membership testing
True
>>> 'crabgrass' in fruit
@ -457,6 +460,11 @@ Here is a brief demonstration::
>>> a ^ b # letters in a or b but not both
{'r', 'd', 'b', 'm', 'z', 'l'}
Like for lists, there is a set comprehension syntax::
>>> a = {x for x in 'abracadabra' if x not in 'abc'}
>>> a
{'r', 'd'}
@ -518,12 +526,12 @@ comprehensions can compactly specify the key-value list. ::
>>> dict([('sape', 4139), ('guido', 4127), ('jack', 4098)])
{'sape': 4139, 'jack': 4098, 'guido': 4127}
>>> dict([(x, x**2) for x in (2, 4, 6)]) # use a list comprehension
{2: 4, 4: 16, 6: 36}
Later in the tutorial, we will learn about Generator Expressions which are even
better suited for the task of supplying key-values pairs to the :func:`dict`
constructor.
In addition, dict comprehensions can be used to create dictionaries from
arbitrary key and value expressions::
>>> {x: x**2 for x in (2, 4, 6)}
{2: 4, 4: 16, 6: 36}
When the keys are simple strings, it is sometimes easier to specify pairs using
keyword arguments::
@ -532,9 +540,8 @@ keyword arguments::
{'sape': 4139, 'jack': 4098, 'guido': 4127}
.. XXX Find out the right way to do these DUBOIS
.. _tut-loopidioms:
.. %
Find out the right way to do these DUBOIS
Looping Techniques
==================

View file

@ -121,7 +121,7 @@ The :mod:`math` module gives access to the underlying C library functions for
floating point math::
>>> import math
>>> math.cos(math.pi / 4.0)
>>> math.cos(math.pi / 4)
0.70710678118654757
>>> math.log(1024, 2)
10.0
@ -264,7 +264,7 @@ documentation::
>>> print(average([20, 30, 70]))
40.0
"""
return sum(values, 0.0) / len(values)
return sum(values) / len(values)
import doctest
doctest.testmod() # automatically validate the embedded tests