如何确定numpy数组是否包含整数? [英] How do I find out if a numpy array contains integers?

问题描述

我知道有一个简单的解决方案，但目前似乎找不到.

I know there is a simple solution to this but can't seem to find it at the moment.

给出一个numpy数组，我需要知道该数组是否包含整数.

Given a numpy array, I need to know if the array contains integers.

仅凭本身检查dtype是不够的，因为存在多个int dtypes(int8，int16，int32，int64 ...).

Checking the dtype per-se is not enough, as there are multiple int dtypes (int8, int16, int32, int64 ...).

推荐答案

在 numpy书中找到了它！第23页:

Found it in the numpy book! Page 23:

层次结构中的其他类型定义了特定的类型类别. 这些类别对于测试对象是否有用很有用. self.dtype.type返回的属于特定类(使用issubclass).

The other types in the hierarchy define particular categories of types. These categories can be useful for testing whether or not the object returned by self.dtype.type is of a particular class (using issubclass).

issubclass(n.dtype('int8').type, n.integer)
>>> True
issubclass(n.dtype('int16').type, n.integer)
>>> True

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