/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

1 vote327 views1 answer
Python multiaxis slicing
Python
0 vote315 views1 answer
Cant import config python 3
Python
-1 vote299 views1 answer
What is text wrap in python
Python
1 vote351 views1 answer
Python delete first two indexes
Python
0 vote336 views1 answer
Update nested dictionary python
Python
0 vote329 views1 answer
Square finder python
Python
14 votes287 views2 answers
Tkinter clear canvas
Python
0 vote348 views1 answer
Take substring of every element in dataframe
Python
7 votes350 views3 answers
Determine if number is prime python
Python
1 vote314 views1 answer
Python turn non printable character to escape string
Python