/Python/Declaring a numpy array with certain size

Declaring a numpy array with certain size

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

Similar codes

5 votes217 views1 answer
Python flask query params
Python
5 votes200 views2 answers
Tables in jinja template
Python
0 vote214 views1 answer
Scatter plot points density color pandas
Python
0 vote234 views1 answer
Install matplotlib.pyplot mac python 3
Python
0 vote187 views1 answer
Pandas filter length of string
Python
1 vote237 views1 answer
Django createmany
Python Django
0 vote192 views1 answer
Lag function in pandas
Python
1 vote198 views1 answer
Def __init__ python not overwrite parrent class
Python
0 vote211 views1 answer
How to write manual querry in drf
Python
0 vote206 views1 answer
Default dictionary value
Python