convert list of list to numpy array code example

Example 1: numpy list to array

# importing library 
import numpy  
  
# initilizing list 
lst = [1, 7, 0, 6, 2, 5, 6] 
  
# converting list to array 
arr = numpy.array(lst) 
  
# displaying list 
print ("List: ", lst) 
  
# displaying array 
print ("Array: ", arr)

Example 2: np.array to list

>>> a = np.array([1, 2])
>>> list(a)
[1, 2]
>>> a.tolist()
[1, 2]

Example 3: convert list of lists to numpy array matrix python

x=[[1,2],[1,2,3],[1]]
y=numpy.array([numpy.array(xi) for xi in x])
type(y)
# <type 'numpy.ndarray'>
type(y[0])
# <type 'numpy.ndarray'>