如何输出python中list的维度
python中输出list的维度可以使用numpy来实现:
import numpy as npa = [[1,2],[3,4]]print(np.array(a).shape)
扩展:
reshape&resize&shape改变数组维度
reshape函数:不改变原数组维度,有返回值
resize函数:直接改变原数组维度,无返回值
shape属性:直接改变原数组维度
>>> import numpy as np>>> a=np.arange(12)>>> aarray([ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11])>>> a.reshape(2,6) array([[ 0, 1, 2, 3, 4, 5], [ 6, 7, 8, 9, 10, 11]])>>> aarray([ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11])>>> a.reshape(2,3,2) array([[[ 0, 1], [ 2, 3], [ 4, 5]], [[ 6, 7], [ 8, 9], [10, 11]]])>>> a.resize(2,6)>>> a>>> array([[ 0, 1, 2, 3, 4, 5], [ 6, 7, 8, 9, 10, 11]])>>> a.shape=(2,6)>>> aarray([[ 0, 1, 2, 3, 4, 5], [ 6, 7, 8, 9, 10, 11]])>>> a.shape=(2,3,2)>>> aarray([[[ 0, 1], [ 2, 3], [ 4, 5]], [[ 6, 7], [ 8, 9], [10, 11]]])>>>
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