Transpose vs Flatten

import numpy as np

a = np.array([5,4])[np.newaxis]

a

array([[5, 4]])

a.shape

(1, 2)

b = a.T

b

array([[5],
       [4]])

c = np.array([
    [1, 2],
    [1, 4],
    [4, 5]
])

c

array([[1, 2],
       [1, 4],
       [4, 5]])

c.shape

(3, 2)

d = c.T

d

array([[1, 1, 4],
       [2, 4, 5]])

e = c.flatten()

e

array([1, 2, 1, 4, 4, 5])

e.shape

(6,)

e.ndim

1

c.ndim

2