diff options
| -rw-r--r-- | morphlib/util.py | 10 | ||||
| -rw-r--r-- | morphlib/util_tests.py | 11 |
2 files changed, 21 insertions, 0 deletions
diff --git a/morphlib/util.py b/morphlib/util.py index 04df0633..dd2d05e1 100644 --- a/morphlib/util.py +++ b/morphlib/util.py @@ -13,6 +13,7 @@ # with this program; if not, write to the Free Software Foundation, Inc., # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +import itertools import os import re @@ -412,3 +413,12 @@ def get_host_architecture(): # pragma: no cover def sanitize_environment(env): for k in env: env[k] = str(env[k]) + +def iter_trickle(iterable, limit): + '''Split an iterable up into `limit` length chunks.''' + it = iter(iterable) + while True: + buf = list(itertools.islice(it, limit)) + if len(buf) == 0: + break + yield buf diff --git a/morphlib/util_tests.py b/morphlib/util_tests.py index 2ad9e8aa..fbf7f27b 100644 --- a/morphlib/util_tests.py +++ b/morphlib/util_tests.py @@ -110,3 +110,14 @@ class ParseEnvironmentPairsTests(unittest.TestCase): d = { 'a': 1 } morphlib.util.sanitize_environment(d) self.assertTrue(isinstance(d['a'], str)) + +class IterTrickleTests(unittest.TestCase): + + def test_splits(self): + self.assertEqual(list(morphlib.util.iter_trickle("foobarbazqux", 3)), + [["f", "o", "o"], ["b", "a", "r"], + ["b", "a", "z"], ["q", "u", "x"]]) + + def test_truncated_final_sequence(self): + self.assertEqual(list(morphlib.util.iter_trickle("barquux", 3)), + [["b", "a", "r"], ["q", "u", "u"], ["x"]]) |