def sequence(iterable):
"Coerce iterable to sequence, if it is not already one."
return (iterable if isinstance(iterable, collections.abc.Sequence)
else tuple(iterable))
python类abc()的实例源码
def issequence(x):
"Is x a sequence?"
return isinstance(x, collections.abc.Sequence)
def get_agen(self, factory):
self.check_source()
if isinstance(factory, collections.abc.AsyncIterable):
result = factory.__aiter__()
else:
result = factory()
assert isinstance(result, collections.abc.AsyncGenerator)
return result
def source(self, value):
if value is self._source:
return
if self.active:
raise RuntimeError("Cannot set the source while active")
if not (isinstance(value, collections.abc.AsyncIterable) or
callable(value)):
raise RuntimeError("The source must be and async iterable or a "
"callable returning an async generator")
self._source = value
def get_collection_iterator(self, context: Context) -> Iterator[Any]:
collection = self._accessor.perform_access(context)
if isinstance(collection, collections.abc.Set): # type: ignore (mypy does not know about collections.abc)
return iter(collection)
elif isinstance(collection, collections.abc.Sequence): # type: ignore (mypy does not know about collections.abc)
return enumerate(collection) # yields (index, element) tuples
elif isinstance(collection, collections.abc.Mapping): # type: ignore (mypy does not know about collections.abc)
return iter(collection.items()) # yields (key, element) tuples
else:
raise ValueError(
'During iteration {0!r}: '
'collection object of type {1!r} could not be identified as Set, Sequence or Dictionary. '
'It should inherit from collections.abc.Set, collections.abc.Sequence, or collections.abc.Mapping.'
.format(self, type(collection)))
def test_pop(self):
# Tests for pop with specified key
d = {}
k, v = 'abc', 'def'
d[k] = v
self.assertRaises(KeyError, d.pop, 'ghi')
self.assertEqual(d.pop(k), v)
self.assertEqual(len(d), 0)
self.assertRaises(KeyError, d.pop, k)
self.assertEqual(d.pop(k, v), v)
d[k] = v
self.assertEqual(d.pop(k, 1), v)
self.assertRaises(TypeError, d.pop)
class Exc(Exception): pass
class BadHash(object):
fail = False
def __hash__(self):
if self.fail:
raise Exc()
else:
return 42
x = BadHash()
d[x] = 42
x.fail = True
self.assertRaises(Exc, d.pop, x)
def test_factory(self):
Point = namedtuple('Point', 'x y')
self.assertEqual(Point.__name__, 'Point')
self.assertEqual(Point.__slots__, ())
self.assertEqual(Point.__module__, __name__)
self.assertEqual(Point.__getitem__, tuple.__getitem__)
self.assertEqual(Point._fields, ('x', 'y'))
self.assertIn('class Point(tuple)', Point._source)
self.assertRaises(ValueError, namedtuple, 'abc%', 'efg ghi') # type has non-alpha char
self.assertRaises(ValueError, namedtuple, 'class', 'efg ghi') # type has keyword
self.assertRaises(ValueError, namedtuple, '9abc', 'efg ghi') # type starts with digit
self.assertRaises(ValueError, namedtuple, 'abc', 'efg g%hi') # field with non-alpha char
self.assertRaises(ValueError, namedtuple, 'abc', 'abc class') # field has keyword
self.assertRaises(ValueError, namedtuple, 'abc', '8efg 9ghi') # field starts with digit
self.assertRaises(ValueError, namedtuple, 'abc', '_efg ghi') # field with leading underscore
self.assertRaises(ValueError, namedtuple, 'abc', 'efg efg ghi') # duplicate field
namedtuple('Point0', 'x1 y2') # Verify that numbers are allowed in names
namedtuple('_', 'a b c') # Test leading underscores in a typename
nt = namedtuple('nt', 'the quick brown fox') # check unicode input
self.assertNotIn("u'", repr(nt._fields))
nt = namedtuple('nt', ('the', 'quick')) # check unicode input
self.assertNotIn("u'", repr(nt._fields))
self.assertRaises(TypeError, Point._make, [11]) # catch too few args
self.assertRaises(TypeError, Point._make, [11, 22, 33]) # catch too many args
def validate_abstract_methods(self, abc, *names):
methodstubs = dict.fromkeys(names, lambda s, *args: 0)
# everything should work will all required methods are present
C = type('C', (abc,), methodstubs)
C()
# instantiation should fail if a required method is missing
for name in names:
stubs = methodstubs.copy()
del stubs[name]
C = type('C', (abc,), stubs)
self.assertRaises(TypeError, C, name)
def validate_isinstance(self, abc, name):
stub = lambda s, *args: 0
C = type('C', (object,), {'__hash__': None})
setattr(C, name, stub)
self.assertIsInstance(C(), abc)
self.assertTrue(issubclass(C, abc))
C = type('C', (object,), {'__hash__': None})
self.assertNotIsInstance(C(), abc)
self.assertFalse(issubclass(C, abc))
def test_repr_recursive(self):
# See issue #9826
od = OrderedDict.fromkeys('abc')
od['x'] = od
self.assertEqual(repr(od),
"OrderedDict([('a', None), ('b', None), ('c', None), ('x', ...)])")
def test_difference(self):
i = self.s.difference(self.otherword)
for c in self.letters:
self.assertEqual(c in i, c in self.d and c not in self.otherword)
self.assertEqual(self.s, self.thetype(self.word))
self.assertEqual(type(i), self.basetype)
self.assertRaises(PassThru, self.s.difference, check_pass_thru())
self.assertRaises(TypeError, self.s.difference, [[]])
for C in set, frozenset, dict.fromkeys, str, list, tuple:
self.assertEqual(self.thetype('abcba').difference(C('cdc')), set('ab'))
self.assertEqual(self.thetype('abcba').difference(C('efgfe')), set('abc'))
self.assertEqual(self.thetype('abcba').difference(C('ccb')), set('a'))
self.assertEqual(self.thetype('abcba').difference(C('ef')), set('abc'))
self.assertEqual(self.thetype('abcba').difference(), set('abc'))
self.assertEqual(self.thetype('abcba').difference(C('a'), C('b')), set('c'))
def test_sub_and_super(self):
p, q, r = map(self.thetype, ['ab', 'abcde', 'def'])
self.assertTrue(p < q)
self.assertTrue(p <= q)
self.assertTrue(q <= q)
self.assertTrue(q > p)
self.assertTrue(q >= p)
self.assertFalse(q < r)
self.assertFalse(q <= r)
self.assertFalse(q > r)
self.assertFalse(q >= r)
self.assertTrue(set('a').issubset('abc'))
self.assertTrue(set('abc').issuperset('a'))
self.assertFalse(set('a').issubset('cbs'))
self.assertFalse(set('cbs').issuperset('a'))
def test_difference_update(self):
retval = self.s.difference_update(self.otherword)
self.assertEqual(retval, None)
for c in (self.word + self.otherword):
if c in self.word and c not in self.otherword:
self.assertIn(c, self.s)
else:
self.assertNotIn(c, self.s)
self.assertRaises(PassThru, self.s.difference_update, check_pass_thru())
self.assertRaises(TypeError, self.s.difference_update, [[]])
self.assertRaises(TypeError, self.s.symmetric_difference_update, [[]])
for p, q in (('cdc', 'ab'), ('efgfe', 'abc'), ('ccb', 'a'), ('ef', 'abc')):
for C in set, frozenset, dict.fromkeys, str, list, tuple:
s = self.thetype('abcba')
self.assertEqual(s.difference_update(C(p)), None)
self.assertEqual(s, set(q))
s = self.thetype('abcdefghih')
s.difference_update()
self.assertEqual(s, self.thetype('abcdefghih'))
s = self.thetype('abcdefghih')
s.difference_update(C('aba'))
self.assertEqual(s, self.thetype('cdefghih'))
s = self.thetype('abcdefghih')
s.difference_update(C('cdc'), C('aba'))
self.assertEqual(s, self.thetype('efghih'))
def test_add_present(self):
self.set.add("c")
self.assertEqual(self.set, set("abc"))
def test_discard_absent(self):
self.set.discard("d")
self.assertEqual(self.set, set("abc"))
def setUp(self):
self.set = set((1, 2, 3))
self.other = 'abc'
self.otherIsIterable = True
#------------------------------------------------------------------------------
def test_builtin_tuple(self):
self.assertEqual(tuple(SequenceClass(5)), (0, 1, 2, 3, 4))
self.assertEqual(tuple(SequenceClass(0)), ())
self.assertEqual(tuple([]), ())
self.assertEqual(tuple(()), ())
self.assertEqual(tuple("abc"), ("a", "b", "c"))
d = {"one": 1, "two": 2, "three": 3}
self.assertEqual(tuple(d), tuple(d.keys()))
self.assertRaises(TypeError, tuple, list)
self.assertRaises(TypeError, tuple, 42)
f = open(TESTFN, "w")
try:
for i in range(5):
f.write("%d\n" % i)
finally:
f.close()
f = open(TESTFN, "r")
try:
self.assertEqual(tuple(f), ("0\n", "1\n", "2\n", "3\n", "4\n"))
f.seek(0, 0)
self.assertEqual(tuple(f),
("0\n", "1\n", "2\n", "3\n", "4\n"))
finally:
f.close()
try:
unlink(TESTFN)
except OSError:
pass
# Test filter()'s use of iterators.
def test_in_and_not_in(self):
for sc5 in IteratingSequenceClass(5), SequenceClass(5):
for i in range(5):
self.assertIn(i, sc5)
for i in "abc", -1, 5, 42.42, (3, 4), [], {1: 1}, 3-12j, sc5:
self.assertNotIn(i, sc5)
self.assertRaises(TypeError, lambda: 3 in 12)
self.assertRaises(TypeError, lambda: 3 not in map)
d = {"one": 1, "two": 2, "three": 3, 1j: 2j}
for k in d:
self.assertIn(k, d)
self.assertNotIn(k, d.values())
for v in d.values():
self.assertIn(v, d.values())
self.assertNotIn(v, d)
for k, v in d.items():
self.assertIn((k, v), d.items())
self.assertNotIn((v, k), d.items())
f = open(TESTFN, "w")
try:
f.write("a\n" "b\n" "c\n")
finally:
f.close()
f = open(TESTFN, "r")
try:
for chunk in "abc":
f.seek(0, 0)
self.assertNotIn(chunk, f)
f.seek(0, 0)
self.assertIn((chunk + "\n"), f)
finally:
f.close()
try:
unlink(TESTFN)
except OSError:
pass
# Test iterators with operator.countOf (PySequence_Count).
def __instancecheck__(self, obj):
# For unparametrized Callable we allow this, because
# typing.Callable should be equivalent to
# collections.abc.Callable.
if self.__args__ is None and self.__result__ is None:
return isinstance(obj, collections_abc.Callable)
else:
raise TypeError("Callable[] cannot be used with isinstance().")
def send_answer(self, bot, chat_id, answer):
print("Sending answer %r to %s" % (answer, chat_id))
if isinstance(answer, collections.abc.Iterable) and not isinstance(answer, str):
# ?? ???????? ????????? ???????? -- ?????? ?????? ???? ??????????
answer = list(map(self._convert_answer_part, answer))
else:
# ?? ???????? ???? ?????? -- ?????? ? ????? ????? ??????
answer = [self._convert_answer_part(answer)]
# ????? ???, ??? ????????? ????????? ?????????, ???? ?????? ? ???????
# «????????» -- ?????????? ??? ??? ? ??????????? ??? ????-??????
current_message = last_message = None
for part in answer:
if isinstance(part, Message):
if current_message is not None:
# ?????????, ??????? ?? ????????? ??????, ???? ?? ?????????.
# ????????? ?? ??? ??????? ?????????, ????? ??? ?????????
# ?? ???????? ???????? (???? ?? ??????? ????????)
current_message = copy.deepcopy(current_message)
current_message.options.setdefault("disable_notification", True)
self._send_or_edit(bot, chat_id, current_message)
current_message = part
if isinstance(part, ReplyMarkup):
# ???, ? ??? ? ???????! ????????? ???????? ?????????.
# ??? ????????? -- ?? ????????, ??? ??????.
current_message.options["reply_markup"] = part
# ???? ?? ?????? ????????? ????????? ??????????? ?????????.
if current_message is not None:
self._send_or_edit(bot, chat_id, current_message)
