Python pxd:我应该如何实现“\uuueq\uuuiq()”?
我试图用cythonPython pxd:我应该如何实现“\uuueq\uuuiq()”?,python,cython,metaclass,Python,Cython,Metaclass,我试图用cython.pxd扩展现有的python源代码,Stefan Behnel在本系列的第32到35张幻灯片中对此进行了说明 作为练习的一部分,我一直在用元类中的\uuuueq\uuuu()方法碰壁。我希望我可以选择一个更简单的案例来启动Cython,但我的生产代码并没有那么简单。我编造了一个“最小的,完整的例子”来说明这个问题。。。请参阅问题底部的代码 短篇小说 如果我使用cdefinline\uuuuuu richcmp\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
.pxd
扩展现有的python源代码,Stefan Behnel在本系列的第32到35张幻灯片中对此进行了说明
作为练习的一部分,我一直在用元类中的\uuuueq\uuuu()
方法碰壁。我希望我可以选择一个更简单的案例来启动Cython,但我的生产代码并没有那么简单。我编造了一个“最小的,完整的例子”来说明这个问题。。。请参阅问题底部的代码
短篇小说
- 如果我使用
,cython抱怨cdefinline\uuuuuu richcmp\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuojapan\u Car\uuuuuuuabcOther,int op:
- 如果我使用
def\uuuu richcmp\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuojapan\u Car\u ABC self,Japan\u Car\u ABC other,int op:
- 如果我使用
- 我知道纯python
文件有限制;在my.pxd
中定义.pxd
是否是使用.pxd
扩充纯python的有效方法.pxd
- 如果这是使用
的有效方法,如何修复此问题以正确编译.pxd
- 如果这是错误的,那么
是否可以扩展我的纯python元类,而不必在.pxd
文件中重新编写整个元类?(例如:).pyx
.pxd
### File: car_abc.pxd
# cython: infer_types=True
cimport cython
cdef class Japan_Car_ABC:
cpdef public char* model
cpdef public char* color
def __richcmp__(Japan_Car_ABC self, Japan_Car_ABC other, int op):
"""Ref: http://docs.cython.org/src/userguide/special_methods.html#rich-comparisons"""
if op==2:
# op==2 is __eq__() in pure python
if self.model==other.model:
return True
return False
else:
err_msg = "op {0} isn't implemented yet".format(op)
raise NotImplementedError(err_msg)
信息性的: car_abc.py:
### File: car_abc.py
from abc import ABCMeta
class Japan_Car_ABC(object):
__metaclass__ = ABCMeta
def __init__(self, model="", color=""):
self.model = model
self.color = color
def __eq__(self, other):
if self.model==other.model:
return True
return False
def __hash__(self):
return hash(self.model)
car.py:
from car_abc import Japan_Car_ABC
class Lexus(Japan_Car_ABC):
def __init__(self, *args, **kwargs):
bling = kwargs.pop("bling", True) # bling keyword (default: True)
super(Lexus, self).__init__(*args, **kwargs)
self.bling = bling
class Toyota(Japan_Car_ABC):
def __init__(self, *args, **kwargs):
super(Toyota, self).__init__(*args, **kwargs)
if __name__=="__main__":
gloria_car = Lexus(model="ES350", color="White")
jeff_car = Toyota(model="Camry", color="Silver")
print("gloria_car.model: {0}".format(gloria_car.model))
print("jeff_car.model: {0}".format(jeff_car.model))
print("gloria_car==jeff_car: {0}".format(gloria_car==jeff_car))
setup.py:
from distutils.core import setup
from distutils.extension import Extension
from Cython.Distutils import build_ext
ext_modules = [Extension("car_abc", ["car_abc.py"]),
#Extension("car", ["car.py"]),
]
setup(
name = "really build this thing",
cmdclass = {'build_ext': build_ext},
ext_modules = ext_modules
)
简单的答案(从Nils Bruin通过cython用户
)得到)是pxd不能用于实现方法(例如\uuuu richcmp\uu()
)。因为我使用的是元类,所以我需要将代码移植到.pyx中,这样我就可以实现\uu richcmp\uu()
和其他特殊的cython方法