mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-04 08:59:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 11

C Code:

Browse source 
* Removed the ifilter flag wart by splitting it into two simpler functions.
* Fixed comment tabbing in C code.
* Factored module start-up code into a loop.

Documentation:
* Re-wrote introduction.
* Addede examples for quantifiers.
* Simplified python equivalent for islice().
* Documented split of ifilter().

Sets.py:
* Replace old ifilter() usage with new.
This commit is contained in:
Raymond Hettinger 2003-02-09 06:40:58 +00:00
parent cb3319f61e
commit 60eca9331a
4 changed files with 354 additions and 193 deletions
Download patch file Download diff file Expand all files Collapse all files

25
Lib/test/test_itertools.py
View file

@ -13,12 +13,19 @@ class TestBasicOps(unittest.TestCase):
def isEven(x):
return x%2==0
self.assertEqual(list(ifilter(isEven, range(6))), [0,2,4])
self.assertEqual(list(ifilter(isEven, range(6), True)), [1,3,5])
self.assertEqual(list(ifilter(None, [0,1,0,2,0])), [1,2])
self.assertRaises(TypeError, ifilter)
self.assertRaises(TypeError, ifilter, 3)
self.assertRaises(TypeError, ifilter, isEven, 3)
self.assertRaises(TypeError, ifilter, isEven, [3], True, 4)
def test_ifilterfalse(self):
def isEven(x):
return x%2==0
self.assertEqual(list(ifilterfalse(isEven, range(6))), [1,3,5])
self.assertEqual(list(ifilterfalse(None, [0,1,0,2,0])), [0,0,0])
self.assertRaises(TypeError, ifilterfalse)
self.assertRaises(TypeError, ifilterfalse, 3)
self.assertRaises(TypeError, ifilterfalse, isEven, 3)
def test_izip(self):
ans = [(x,y) for x, y in izip('abc',count())]
@ -133,7 +140,19 @@ Samuele
>>> def nth(iterable, n):
... "Returns the nth item"
... return islice(iterable, n, n+1).next()
... return list(islice(iterable, n, n+1))
>>> def all(pred, seq):
... "Returns True if pred(x) is True for every element in the iterable"
... return not nth(ifilterfalse(pred, seq), 0)
>>> def some(pred, seq):
... "Returns True if pred(x) is True at least one element in the iterable"
... return bool(nth(ifilter(pred, seq), 0))
>>> def no(pred, seq):
... "Returns True if pred(x) is False for every element in the iterable"
... return not nth(ifilter(pred, seq), 0)
"""