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Code Issues Projects Releases Packages Wiki Activity Actions 14

Issue #27842: The csv.DictReader now returns rows of type OrderedDict.

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This commit is contained in:
Raymond Hettinger 2016-08-30 12:35:50 -07:00
parent 15f44ab043
commit 43ca452887
4 changed files with 45 additions and 16 deletions
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16
Lib/test/test_csv.py
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@ -10,6 +10,7 @@ import csv
import gc
import pickle
from test import support
from itertools import permutations
class Test_Csv(unittest.TestCase):
"""
@ -1092,6 +1093,21 @@ class TestUnicode(unittest.TestCase):
fileobj.seek(0)
self.assertEqual(fileobj.read(), expected)
class KeyOrderingTest(unittest.TestCase):
def test_ordering_for_the_dict_reader_and_writer(self):
resultset = set()
for keys in permutations("abcde"):
with TemporaryFile('w+', newline='', encoding="utf-8") as fileobject:
dw = csv.DictWriter(fileobject, keys)
dw.writeheader()
fileobject.seek(0)
dr = csv.DictReader(fileobject)
kt = tuple(dr.fieldnames)
self.assertEqual(keys, kt)
resultset.add(kt)
# Final sanity check: were all permutations unique?
self.assertEqual(len(resultset), 120, "Key ordering: some key permutations not collected (expected 120)")
class MiscTestCase(unittest.TestCase):
def test__all__(self):