cdef类可以存储未声明(类型)的变量吗?

问题描述

我很好奇以下内容是否有效，其中只有一些变量在类型声明的类中进行了类型声明.也就是说，在这种情况下，在类之前的cdef是否无效?

I’m curious if the following is valid, where only some of the variables are type-declared in a type-declared class. That is, would cdef before the class be invalid in this case?

cdef class CythonClass:

    cdef int var1, var2

    def __init__(self, a, b):
        self.var1 = a
        self.var2 = b
        self.defaultdict = DefaultDict(DefaultDict([]))

推荐答案

简短答案:

否，您需要声明它.否则，您会收到AttributeError: 'xxx.CythonClass' object has no attribute 'defaultdict'错误.

您始终可以将其声明为(python)对象:

You can always declare it as (python) object:

cdef class CythonClass(object):

    cdef int var1, var2
    cdef object defaultdict  # declared as python object

这不是很有效，但是可以.

This won't be very efficient, but it works.

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