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# mode: run
# __getattribute__ and __getattr__ special methods and subclasses.
cdef class boring:
cdef readonly int boring_member
cdef readonly int getattr_called
cdef int getattribute_called
def __init__(self):
self.boring_member = 10
cdef class getattr_boring(boring):
"""
getattr does not override members.
>>> a = getattr_boring()
>>> a.boring_member
10
>>> a.getattr_called
0
>>> print(a.resolved_by)
getattr_boring
>>> a.getattr_called
1
>>> a.no_such_member
Traceback (most recent call last):
AttributeError
>>> a.getattr_called
2
"""
def __getattr__(self,n):
self.getattr_called += 1
if n == 'resolved_by':
return 'getattr_boring'
elif n == 'getattr_boring':
return True
else:
raise AttributeError
# currently fails, see #1793
#class getattr_boring_py(getattr_boring):
# __doc__ = getattr_boring.__doc__.replace(
# 'getattr_boring()', 'getattr_boring_py()')
cdef class getattribute_boring(boring):
"""
getattribute overrides members.
>>> a = getattribute_boring()
>>> a.getattribute_called
1
>>> a.boring_member
Traceback (most recent call last):
AttributeError
>>> a.getattribute_called
3
>>> print(a.resolved_by)
getattribute_boring
>>> a.getattribute_called
5
>>> a.no_such_member
Traceback (most recent call last):
AttributeError
>>> a.getattribute_called
7
"""
def __getattribute__(self,n):
self.getattribute_called += 1
if n == 'resolved_by':
return 'getattribute_boring'
elif n == 'getattribute_boring':
return True
elif n == 'getattribute_called':
return self.getattribute_called
else:
raise AttributeError
class getattribute_boring_py(getattribute_boring):
__doc__ = getattribute_boring.__doc__.replace(
'getattribute_boring()', 'getattribute_boring_py()')
cdef class _getattr:
cdef readonly int getattr_called
def __getattr__(self,n):
self.getattr_called += 1
if n == 'resolved_by':
return '_getattr'
elif n == '_getattr':
return True
elif n == 'getattr_called':
# must only get here if __getattribute__ is overwritten
assert 'getattribute' in type(self).__name__
return self.getattr_called
else:
raise AttributeError
class getattr_py(_getattr):
"""
getattr is inherited.
>>> a = getattr_py()
>>> a.getattr_called
0
>>> print(a.resolved_by)
_getattr
>>> a.getattr_called
1
>>> print(a._getattr)
True
>>> a.getattr_called
2
>>> a.no_such_member
Traceback (most recent call last):
AttributeError
# currently fails, see #1793
#>>> a.getattr_called
#3
"""
cdef class _getattribute:
cdef int getattribute_called
def __getattribute__(self,n):
self.getattribute_called += 1
if n == 'resolved_by':
return '_getattribute'
elif n == '_getattribute':
return True
elif n == 'getattribute_called':
return self.getattribute_called
else:
raise AttributeError
class getattribute_py(_getattribute):
"""
getattribute is inherited.
>>> a = getattribute_py()
>>> a.getattribute_called
1
>>> print(a.resolved_by)
_getattribute
>>> a.getattribute_called
3
>>> print(a._getattribute)
True
>>> a.getattribute_called
5
>>> a.no_such_member
Traceback (most recent call last):
AttributeError
>>> a.getattribute_called
7
"""
cdef class boring_getattribute(_getattribute):
cdef readonly int boring_getattribute_member
cdef class boring_boring_getattribute(boring_getattribute):
"""
getattribute is inherited.
>>> a = boring_boring_getattribute()
>>> a.getattribute_called
1
>>> a.boring_getattribute_member
Traceback (most recent call last):
AttributeError
>>> a.getattribute_called
3
>>> a.boring_boring_getattribute_member
Traceback (most recent call last):
AttributeError
>>> a.getattribute_called
5
>>> print(a.resolved_by)
_getattribute
>>> a.getattribute_called
7
>>> a.no_such_member
Traceback (most recent call last):
AttributeError
>>> a.getattribute_called
9
"""
cdef readonly int boring_boring_getattribute_member
class boring_boring_getattribute_py(boring_boring_getattribute):
__doc__ = boring_boring_getattribute.__doc__.replace(
'boring_boring_getattribute()', 'boring_boring_getattribute_py()')
cdef class boring_getattr(_getattr):
cdef readonly int boring_getattr_member
cdef class boring_boring_getattr(boring_getattr):
cdef readonly int boring_boring_getattr_member
cdef class getattribute_boring_boring_getattr(boring_boring_getattr):
"""
__getattribute__ is always tried first, then __getattr__, regardless of where
in the inheritance hierarchy they came from.
>>> a = getattribute_boring_boring_getattr()
>>> (a.getattr_called, a.getattribute_called)
(1, 2)
>>> print(a.resolved_by)
getattribute_boring_boring_getattr
>>> (a.getattr_called, a.getattribute_called)
(2, 5)
>>> a.getattribute_boring_boring_getattr
True
>>> (a.getattr_called, a.getattribute_called)
(3, 8)
>>> a._getattr
True
>>> (a.getattr_called, a.getattribute_called)
(5, 11)
>>> a.no_such_member
Traceback (most recent call last):
AttributeError
>>> (a.getattr_called, a.getattribute_called)
(7, 14)
"""
cdef int getattribute_called
def __getattribute__(self,n):
self.getattribute_called += 1
if n == 'resolved_by':
return 'getattribute_boring_boring_getattr'
elif n == 'getattribute_boring_boring_getattr':
return True
elif n == 'getattribute_called':
return self.getattribute_called
else:
raise AttributeError
# currently fails, see #1793
#class getattribute_boring_boring_getattr_py(getattribute_boring_boring_getattr):
# __doc__ = getattribute_boring_boring_getattr.__doc__.replace(
# 'getattribute_boring_boring_getattr()', 'getattribute_boring_boring_getattr_py()')
cdef class getattr_boring_boring_getattribute(boring_boring_getattribute):
"""
__getattribute__ is always tried first, then __getattr__, regardless of where
in the inheritance hierarchy they came from.
>>> a = getattr_boring_boring_getattribute()
>>> (a.getattr_called, a.getattribute_called)
(1, 2)
>>> print(a.resolved_by)
_getattribute
>>> (a.getattr_called, a.getattribute_called)
(2, 5)
>>> a.getattr_boring_boring_getattribute
True
>>> (a.getattr_called, a.getattribute_called)
(4, 8)
>>> a._getattribute
True
>>> (a.getattr_called, a.getattribute_called)
(5, 11)
>>> a.no_such_member
Traceback (most recent call last):
AttributeError
>>> (a.getattr_called, a.getattribute_called)
(7, 14)
"""
cdef readonly int getattr_called # note: property will not be used due to __getattribute__()
def __getattr__(self,n):
self.getattr_called += 1
if n == 'resolved_by':
return 'getattr_boring_boring_getattribute'
elif n == 'getattr_boring_boring_getattribute':
return True
elif n == 'getattr_called':
return self.getattr_called
else:
raise AttributeError
# currently fails, see #1793
#class getattr_boring_boring_getattribute_py(getattr_boring_boring_getattribute):
# __doc__ = getattr_boring_boring_getattribute.__doc__.replace(
# 'getattr_boring_boring_getattribute()', 'getattr_boring_boring_getattribute_py()')
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