How to save a list as a numpy array in python?

Question

I need to know if python list can be saved as a numPy array.

Answer 1

If you look here, he can tell you what you need to know.

http://www.scipy.org/Tentative_NumPy_Tutorial#head-d3f8e5fe9b903f3c3b2a5c0dfceb60d71602cf93

Basically, you can create an array from a sequence.

from numpy import array a = array( [2,3,4] ) 

Or from a sequence of sequences.

 from numpy import array a = array( [[2,3,4], [3,4,5]] ) 

Answer 2

do you mean something like this?

 from numpy import array a = array( your_list ) 

Answer 3

Yes it:

 a = numpy.array([1,2,3]) 

Answer 4

Do you want to save it as a file?

 import numpy as np myList = [1, 2, 3] np.array(myList).dump(open('array.npy', 'wb')) 

... and then read:

 myArray = np.load(open('array.npy', 'rb')) 

Answer 5

You can use numpy.asarray , for example, to convert a list to an array:

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

Answer 6

I suppose you mean converting a list to a numpy array? Then,

 import numpy as np # b is some list, then ... a = np.array(b).reshape(lengthDim0, lengthDim1); 

gives you as an array of list b in the form specified in the change form.

Answer 7

Here is a more complete example:

 import csv import numpy as np with open('filename','rb') as csvfile: cdl = list( csv.reader(csvfile,delimiter='\t')) print "Number of records = " + str(len(cdl)) #then later npcdl = np.array(cdl) 

Hope this helps!

Answer 8

 import numpy as np ... ## other code 

some list comprehension

 t=[nodel[ nodenext[i][j] ] for j in idx] #for each link, find the node lables #t is the list of node labels 

Convert the list to a numpy array using the array method specified in the numpy library.

 t=np.array(t) 

This might be useful: https://numpy.org/devdocs/user/basics.creation.html