Empty array python

Python declare array of size n

>>> n = 5                     #length of list
>>> list = [None] * n         #populate list, length n with n entries "None"
>>> print(list)
[None, None, None, None, None]

>>> list.append(1)            #append 1 to right side of list
>>> list = list[-n:]          #redefine list as the last n elements of list
>>> print(list)
[None, None, None, None, 1]

>>> list.append(1)            #append 1 to right side of list
>>> list = list[-n:]          #redefine list as the last n elements of list
>>> print(list)
[None, None, None, 1, 1]

>>> list.append(1)            #append 1 to right side of list
>>> list = list[-n:]          #redefine list as the last n elements of list
>>> print(list)
[None, None, 1, 1, 1]

Source: stackoverflow.com

Empty array python

import numpy
my_array = numpy.zeros(shape=(row,column))

Similar codes

0 vote116 views1 answer
Python combine nested for loops
Python
0 vote122 views1 answer
Pinyin to pinyin numbers python
Python
0 vote125 views1 answer
Change matplotlib fontsize
Python
0 vote156 views1 answer
Could not find a version that satisfies the requirement psycopg2>=2.8 (from pgcli) (from versions: 2.7.5, 2.7.6, 2.7.6.1, 2.7.7)
Python
0 vote121 views1 answer
Algorithme permettant de passer au negatif une image
Python
5 votes122 views3 answers
Get last day of month python
Python
7 votes127 views3 answers
Divmod
Python
0 vote133 views1 answer
Python apt manager
Python
0 vote139 views1 answer
Python depth first search
Python
11 votes119 views3 answers
Practicing python
Python