/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

0 vote252 views1 answer
Image from wikipedia module in python
Python
0 vote316 views1 answer
Change a coolumn datatype in pandas
Python
1 vote261 views1 answer
Printing with colors
Python
1 vote279 views1 answer
Django loop index
Python
2 votes325 views3 answers
Get absolute url django
Python Django
0 vote251 views2 answers
How to change the name of a variable in a loop python
Python
0 vote254 views2 answers
Python script in excel
Python
6 votes243 views6 answers
Python ide
Python
1 vote265 views1 answer
Placeholder tkinter
Python
6 votes275 views4 answers
Code fibonacci python
Python