python数组改变维数

http://www.cnblogs.com/yuzhuwei/p/4217013.html   冒号：[0:]表示全部，[0:-1]这个会少最后一条数据  

import numpy as np
a = np.array([1, 2, 3, 4]);
b = np.array((5, 6, 7, 8));
c = np.array([[1, 2, 3, 4],[4, 5, 6, 7], [7, 8, 9, 10]])
           

  >>> c.dtype dtype('int32') >>> d = a.reshape((2,2))   >>> d = a.reshape((1,2)) Traceback (most recent call last):