说我有以下内容：
def func():
print 'this is a function and not a method!!!'
class Test:
def TestFunc(self):
print 'this is Test::TestFunc method'
我有以下功能（取自https://bitbucket.org/agronholm/apscheduler/src/d2f00d9ac019/apscheduler/util.py）：
def get_callable_name(func):
"""
Returns the best available display name for the given function/callable.
"""
f_self = getattr(func, '__self__', None) or getattr(func, 'im_self', None)
if f_self and hasattr(func, '__name__'):
if isinstance(f_self, type):
# class method
clsname = getattr(f_self, '__qualname__', None) or f_self.__name__
return '%s.%s' % (clsname, func.__name__)
# bound method
return '%s.%s' % (f_self.__class__.__name__, func.__name__)
if hasattr(func, '__call__'):
if hasattr(func, '__name__'):
# function, unbound method or a class with a __call__ method
return func.__name__
# instance of a class with a __call__ method
return func.__class__.__name__
raise TypeError('Unable to determine a name for %s -- '
'maybe it is not a callable?' % repr(func))
def obj_to_ref(obj):
"""
Returns the path to the given object.
"""
ref = '%s:%s' % (obj.__module__, get_callable_name(obj))
try:
obj2 = ref_to_obj(ref)
if obj != obj2:
raise ValueError
except Exception:
raise ValueError('Cannot determine the reference to %s' % repr(obj))
return ref
def ref_to_obj(ref):
"""
Returns the object pointed to by ``ref``.
"""
if not isinstance(ref, basestring):
raise TypeError('References must be strings')
if not ':' in ref:
raise ValueError('Invalid reference')
modulename, rest = ref.split(':', 1)
try:
obj = __import__(modulename)
except ImportError:
raise LookupError('Error resolving reference %s: '
'could not import module' % ref)
try:
for name in modulename.split('.')[1:] + rest.split('.'):
obj = getattr(obj, name)
return obj
except Exception:
raise LookupError('Error resolving reference %s: '
'error looking up object' % ref)
上述函数 -obj_to_ref返回给定函数对象的文本引用，并ref_to_obj返回给定文本引用的对象。例如，让我们试试这个func功能。
>>>
>>> func
<function func at 0xb7704924>
>>>
>>> obj_to_ref(func)
'__main__:func'
>>>
>>> ref_to_obj('__main__:func')
<function func at 0xb7704924>
>>>
该func功能工作正常。但是当尝试在 的实例上使用这些函数时class Test，它无法获得文本引用。
>>>
>>> t = Test()
>>>
>>> t
<__main__.Test instance at 0xb771b28c>
>>>
>>> t.TestFunc
<bound method Test.TestFunc of <__main__.Test instance at 0xb771b28c>>
>>>
>>>
>>> obj_to_ref(t.TestFunc)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 11, in obj_to_ref
ValueError: Cannot determine the reference to <bound method Test.TestFunc of <__main__.Test instance at 0xb771b28c>>
>>>
>>>
obj_to_ref给定输入的函数以文本表示形式t.TestFunc出现，__main__:Test.TestFunc但不能使用相同的文本生成对象。
问题：
有没有一种方法Python可以表示一个像
>>> t.TestFunc
<bound method Test.TestFunc of <__main__.Test instance at 0xb771b28c>>
>>>
在字符串中并从字符串中重建对象？
如果我们将地址保存0xb771b28c为字符串的一部分并通过取消引用该地址来重新生成对象，是否有可能？！