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# coding=UTF-8
# ex:ts=4:sw=4:et=on
# -------------------------------------------------------------------------
# Copyright (C) 2014 by Mathijs Dumon <mathijs dot dumon at gmail dot com>
# Copyright (C) 2007 by Roberto Cavada <roboogle@gmail.com>
#
# mvc is a framework derived from the original pygtkmvc framework
# hosted at: <http://sourceforge.net/projects/pygtkmvc/>
#
# mvc is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# mvc 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110, USA.
# -------------------------------------------------------------------------
import os
from uuid import uuid4 as get_uuid
def rec_setattr(obj, attr, value):
"""Set object's attribute. May use dot notation.
>>> class C(object): pass
>>> a = C()
>>> a.b = C()
>>> rec_setattr(a, 'b.c', 4)
>>> a.b.c
4
"""
if obj is None:
raise AttributeError("Cannot recursively set attribute (%s) on NoneType" % attr)
else:
if '.' not in attr:
setattr(obj, attr, value)
else:
attr, attrs = attr.split('.', 1)
rec_setattr(getattr(obj, attr), attrs, value)
def rec_getattr(obj, attr, default):
"""Get object's attribute. May use dot notation.
>>> class C(object): pass
>>> a = C()
>>> a.b = C()
>>> a.b.c = 4
>>> rec_getattr(a, 'b.c')
4
"""
if obj is None:
return default
else:
if '.' not in attr:
return getattr(obj, attr, default)
else:
attr, attrs = attr.split('.', 1)
return rec_getattr(getattr(obj, attr), attrs, default)
def round_sig(x, sig=1):
if x == 0:
return 0
else:
return round(x, sig - int(floor(log10(abs(x)))) - 1)
def not_none(passed, default):
"""Returns `passed` if not None, else `default` is returned"""
return passed if passed is not None else default
def getmembers(_object, _predicate):
"""This is an implementation of inspect.getmembers, as in some versions
of python it may be buggy.
See issue at http://bugs.python.org/issue1785"""
# This should be:
# return inspect.getmembers(_object, _predicate)
# ... and it is re-implemented as:
observers = []
for key in dir(_object):
try: m = getattr(_object, key)
except AttributeError: continue
if _predicate(m): observers.append((key, m))
pass
return observers
def get_new_uuid():
return str(get_uuid().hex)
def get_unique_list(seq):
seen = set()
seen_add = seen.add
return [x for x in seq if x not in seen and not seen_add(x)]
def pop_kwargs(kwargs, *keys):
return {
key: kwargs.pop(key) for key in keys if key in kwargs
}
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