Terry J. Reedy added the comment:
Leonardo, even if this were a bug, it would be a mistake to ascribe it to IDLE.
The IDLE Shell is an alternative display window. IDLE sends your code to
Python and displays values computed by Python and output by print statements.
I second Mark's suggestio
Mark Dickinson added the comment:
This isn't a bug. After this line in your code:
o = x
both o and x refer to the same list object. So any modification you make to
that list through the name "x" (for example, x[i][n]+=y[i][n]) will be seen
through the name "o" as well.
There's lots writ
New submission from Leonardo :
in this code the variable o changes on its own:
x=[[-1, 7, 3], [12, 2, -13], [14, 18, -8], [17, 4, -4]]
x1=[[-8, -10, 0], [5, 5, 10], [2, -7, 3], [9, -8, -3]]
y=[[0,0,0],[0,0,0],[0,0,0],[0,0,0]]
k=True
f=0
z=[]
d=[]
while k:
print(k)
o=x
print(o)
f
