#===============================================================================
# Copyright (c) 2015, Max Zwiessele
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# * Redistributions of source code must retain the above copyright notice, this
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# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
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#===============================================================================
from collections import defaultdict
import weakref
[docs]def intarray_default_factory():
import numpy as np
return np.int_([])
[docs]class IntArrayDict(defaultdict):
def __init__(self, default_factory=None):
"""
Default will be self._default, if not set otherwise
"""
defaultdict.__init__(self, intarray_default_factory)
[docs]class ArrayList(list):
"""
List to store ndarray-likes in.
It will look for 'is' instead of calling __eq__ on each element.
"""
def __contains__(self, other):
for el in self:
if el is other:
return True
return False
[docs] def index(self, item):
index = 0
for el in self:
if el is item:
return index
index += 1
raise ValueError("{} is not in list".format(item))
pass
[docs]class ObserverList(object):
"""
A list which containts the observables.
It only holds weak references to observers, such that unbound
observers dont dangle in memory.
"""
def __init__(self):
self._poc = []
def __getitem__(self, ind):
p,o,c = self._poc[ind]
return p, o(), c
[docs] def remove(self, priority, observer, callble):
"""
Remove one observer, which had priority and callble.
"""
self.flush()
for i in range(len(self) - 1, -1, -1):
p,o,c = self[i]
if priority==p and observer==o and callble==c:
del self._poc[i]
def __repr__(self):
return self._poc.__repr__()
[docs] def add(self, priority, observer, callble):
"""
Add an observer with priority and callble
"""
#if observer is not None:
ins = 0
for pr, _, _ in self:
if priority > pr:
break
ins += 1
self._poc.insert(ins, (priority, weakref.ref(observer), callble))
def __str__(self):
from ..param import Param
from ..core.observable_array import ObsAr
from ..core.parameter_core import Parameterizable
ret = []
curr_p = None
def frmt(o):
if isinstance(o, ObsAr):
return 'ObsArr <{}>'.format(hex(id(o)))
elif isinstance(o, (Param,Parameterizable)):
return '{}'.format(o.hierarchy_name())
else:
return repr(o)
for p, o, c in self:
curr = ''
if curr_p != p:
pre = "{!s}: ".format(p)
curr_pre = pre
else: curr_pre = " "*len(pre)
curr_p = p
curr += curr_pre
ret.append(curr + ", ".join([frmt(o), str(c)]))
return '\n'.join(ret)
[docs] def flush(self):
"""
Make sure all weak references, which point to nothing are flushed (deleted)
"""
self._poc = [(p,o,c) for p,o,c in self._poc if o() is not None]
def __iter__(self):
self.flush()
for p, o, c in self._poc:
yield p, o(), c
def __len__(self):
self.flush()
return self._poc.__len__()
pass