本文整理汇总了Python中durus.btree.BTree类的典型用法代码示例。如果您正苦于以下问题：Python BTree类的具体用法？Python BTree怎么用？Python BTree使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了BTree类的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: Document
class Document(Persistent):
@property
def handler(self):
return _handler_index[id(self)]
def __init__(self):
self.notes = BTree()
self.subscribers = PersistentList()
self.notes[0] = Note(self, 0, {'desc': 'ROOT'})
def create_note(self, props={}, cls=Note, parent_id=0, id=None):
if id is None:
if self.notes:
id = max(self.list_note_ids()) + 1
else:
id = 0
if id in self.notes:
raise ValueError('Note id "%s" already in use' % id)
note = cls(self, id, props)
self.notes[id] = note
self.notes[parent_id]._children.append(note.id)
return note
def get_note(self, note_id):
return self.notes[note_id]
def list_note_ids(self):
return self.notes.iterkeys()
def list_notes(self):
return self.notes.itervalues()
def del_note(self, note_id):
for child_note_id in self.get_note(note_id)._children:
self.del_note(child_note_id)
self._cleanup_child_links(note_id)
del self.notes[note_id]
def subscribe(self, subscriber):
self.subscribers.append(subscriber)
def _cleanup_child_links(self, note_id):
for note in self.list_notes():
if note_id in note._children:
note._children.remove(note_id)
def dump_notes(self):
def generate():
for note in self.list_notes():
note_data = {
'props': dict(note._props),
'children': list(note._children),
}
yield note.id, note_data
return json.dumps(dict(generate()))
# TODO: deprecate these methods
def abort(self): self.handler.abort()
def commit(self): self.handler.commit()
def close(self): self.handler.close()示例2: insert_item
def insert_item(self):
# This sequences leads to a splitting where
# the inserted item has the same key as the split
# point.
keys = [3, 56, 11, 57, 1, 32, 106, 98, 103, 108,
101, 104, 7, 94, 105, 85, 99, 89, 28, 65,
107, 95, 97, 93, 96, 102, 86, 100, 0, 14,
35, 15, 12, 6, 84, 90, 2, 81, 4, 5,
69, 9, 30, 78, 13, 10, 8, 82, 47, 62,
27, 88, 87, 83, 31, 79, 45, 91, 29, 92,
34, 33, 44, 25, 50, 26, 16, 17, 19, 43,
21, 64, 24, 37, 22, 59, 63, 18, 20, 38,
52, 55, 53, 42, 23, 39, 60, 40, 36, 41,
46, 61, 77, 75, 68, 74, 73, 71, 72, 70,
80, 54, 67, 66, 51, 49, 76, 58, 49]
bt = BTree()
for i, key in enumerate(keys):
bt[key] = i
assert bt[key] is i, (i, key, bt[key])
# Test set_bnode_minimum_degree()
assert bt.get_depth() == 2, bt.get_depth()
assert bt.get_node_count() == 7, bt.get_node_count()
assert bt.set_bnode_minimum_degree(4) == True
assert bt.get_depth() == 3, bt.get_depth()
assert bt.get_node_count() == 34, bt.get_node_count()示例3: test_delete_case_2c
def test_delete_case_2c(self):
bt = BTree(BNode)
for j in 'abcdefghi':
bt.add(j)
assert bt.root.items == [('d', True)]
del bt['d']
assert len(bt) == bt.root.get_count()示例4: find_extremes
def find_extremes(self):
bt = BTree()
raises(AssertionError, bt.get_min_item)
raises(AssertionError, bt.get_max_item)
for j in range(100):
bt.add(j)
assert bt.get_min_item() == (0, True)
assert bt.get_max_item() == (99, True)示例5: search
def search(self):
bt = BTree(BNode)
for j in range(100):
bt.add(j)
assert bt[1] == True
try:
assert bt[-1]
except KeyError:
pass示例6: _delete_case_3
def _delete_case_3(self):
bt = BTree(BNode)
for j in range(100):
bt.add(j)
assert bt.root.items == [(31, True), (63, True)]
assert [n.items for n in bt.root.nodes] == [
[(15, True)], [(47, True)], [(79, True)]]
assert [[n.items for n in node.nodes]
for node in bt.root.nodes] == [
[[(7, True)], [(23, True)]],
[[(39, True)], [(55, True)]],
[[(71, True)], [(87, True)]]]
return bt示例7: clear
def clear(self):
bt = BTree()
for j in range(10):
bt.add(j)
assert bt.has_key(2)
bt.clear()
assert not bt.has_key(2)
assert bt.keys() == []示例8: setdefault
def setdefault(self):
bt = BTree()
assert bt.setdefault('1', []) == []
assert bt['1'] == []
bt.setdefault('1', 1).append(1)
assert bt['1'] == [1]
bt.setdefault('1', [])
assert bt['1'] == [1]
bt.setdefault('1', 1).append(2)
assert bt['1'] == [1, 2]示例9: items_from
def items_from(self):
bt = BTree()
for j in range(100):
bt.add(j)
for cutoff in (-1, 1, 50.1, 100, 102):
assert (list([(x, y) for (x, y) in bt.items() if x >= cutoff]) ==
list(bt.items_from(cutoff)))
assert (list([(x, y) for (x, y) in bt.items() if x > cutoff]) ==
list(bt.items_from(cutoff, closed=False)))示例10: test_slow
def test_slow(self):
if '--slow' not in sys.argv:
skip('test not run because it is slow')
if SAME_RANDOM:
seed(42)
for bnode_class in BNode.__subclasses__():
if bnode_class.minimum_degree not in (4, 16):
continue
sys.stdout.write('\nbnode_class=%s' % bnode_class)
bt = BTree(bnode_class)
d = {}
number = 0
limit = 10000
for k in range(limit*10):
number = randint(0, limit)
if DEBUG:
bt_bak = deepcopy(bt)
d_bak = deepcopy(d)
if number in bt:
assert number in d
if randint(0, 1) == 1:
del bt[number]
del d[number]
op = 'del'
#sys.stdout.write('\ndel bt[%s]' % number)
else:
bt[number] = 1
d[number] = 1
op = 'ins'
if DEBUG or k % limit == 0:
d_items = sorted(d.items())
assert d_items == list(bt.items())
if DEBUG and not len(d_items) == len(bt):
# set a breakpoint here for interactive debugging
if op == 'ins':
bt_bak[number] = 1
else:
del bt_bak[number]
assert len(d_items) == len(bt)示例11: get
def get(self):
bt = BTree()
for j in range(10):
bt.add(j)
assert bt.get(2) == True
assert bt.get(-1) == None
assert bt.get(-1, 5) == 5示例12: items_backward_from
def items_backward_from(self):
bt = BTree()
for j in range(100):
bt.add(j)
for cutoff in (-1, 1, 50.1, 100, 102):
expect = list(reversed([(x, y) for (x, y) in bt.items()
if x < cutoff]))
got = list(bt.items_backward_from(cutoff))
assert expect == got, (cutoff, expect, got)
expect = list(reversed([(x, y) for (x, y) in bt.items()
if x <= cutoff]))
got = list(bt.items_backward_from(cutoff, closed=True))
assert expect == got, (cutoff, expect, got)示例13: slow
def slow(self):
for bnode_class in BNode.__subclasses__():
if bnode_class.minimum_degree not in (4, 16):
continue
sys.stdout.write('\nbnode_class=%s' % bnode_class)
bt = BTree(bnode_class)
d = {}
number = 0
limit = 10000
for k in range(limit*10):
number = randint(0, limit)
if number in bt:
assert number in d
if randint(0, 1) == 1:
del bt[number]
del d[number]
sys.stdout.write('\ndel bt[%s]' % number)
else:
bt[number] = 1
d[number] = 1
if k % limit == 0:
d_items = sorted(d.items())
assert d_items == list(bt.items())
assert len(d_items) == len(bt)示例14: contains
def contains(self):
bt = BTree()
for j in range(10):
bt.add(j)
assert 2 in bt
assert -1 not in bt示例15: test_delete_case_2a
def test_delete_case_2a(self):
bt = BTree(BNode)
for j in 'jklmoab':
bt.add(j)
del bt['k']
assert len(bt) == bt.root.get_count()