forked from mementum/backtrader
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathobserver.py
More file actions
68 lines (51 loc) · 2.22 KB
/
observer.py
File metadata and controls
68 lines (51 loc) · 2.22 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
#!/usr/bin/env python
# -*- coding: utf-8; py-indent-offset:4 -*-
###############################################################################
#
# Copyright (C) 2015-2020 Daniel Rodriguez
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
###############################################################################
from __future__ import (absolute_import, division, print_function,
unicode_literals)
from .lineiterator import LineIterator, ObserverBase, StrategyBase
from backtrader.utils.py3 import with_metaclass
class MetaObserver(ObserverBase.__class__):
def donew(cls, *args, **kwargs):
_obj, args, kwargs = super(MetaObserver, cls).donew(*args, **kwargs)
_obj._analyzers = list() # keep children analyzers
return _obj, args, kwargs # return the instantiated object and args
def dopreinit(cls, _obj, *args, **kwargs):
_obj, args, kwargs = \
super(MetaObserver, cls).dopreinit(_obj, *args, **kwargs)
if _obj._stclock: # Change clock if strategy wide observer
_obj._clock = _obj._owner
return _obj, args, kwargs
class Observer(with_metaclass(MetaObserver, ObserverBase)):
_stclock = False
_OwnerCls = StrategyBase
_ltype = LineIterator.ObsType
csv = True
plotinfo = dict(plot=False, subplot=True)
# An Observer is ideally always observing and that' why prenext calls
# next. The behaviour can be overriden by subclasses
def prenext(self):
self.next()
def _register_analyzer(self, analyzer):
self._analyzers.append(analyzer)
def _start(self):
self.start()
def start(self):
pass