In [1]:

    

import numpy as np


    

In [2]:

    

a = np.arange(6)
print(a)


    

    




[0 1 2 3 4 5]

In [3]:

    

print(a.reshape(2, 3))


    

    




[[0 1 2]
 [3 4 5]]

In [4]:

    

print(a.reshape(-1, 3))


    

    




[[0 1 2]
 [3 4 5]]

In [5]:

    

print(a.reshape(2, -1))


    

    




[[0 1 2]
 [3 4 5]]

In [6]:

    

# print(a.reshape(3, 4))
# ValueError: cannot reshape array of size 6 into shape (3,4)


    

In [7]:

    

# print(a.reshape(-1, 4))
# ValueError: cannot reshape array of size 6 into shape (4)


    

In [8]:

    

l = [0, 1, 2, 3, 4, 5]


    

In [9]:

    

print(np.array(l).reshape(-1, 3).tolist())


    

    




[[0, 1, 2], [3, 4, 5]]

In [10]:

    

print(np.array(l).reshape(3, -1).tolist())


    

    




[[0, 1], [2, 3], [4, 5]]