Numpy: 数组属性

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数组属性

>>> import numpy as np
>>> a = np.ones((4,5))
>>> print(a)
[[1. 1. 1. 1. 1.]
 [1. 1. 1. 1. 1.]
 [1. 1. 1. 1. 1.]
 [1. 1. 1. 1. 1.]]
>>> a.ndim
2
>>> a.shape
(4, 5)
>>> a.dtype
dtype('float64')

取自“http://www.openbrains.net/mediawiki/index.php?title=Numpy:_数组属性&oldid=29875”