On 23/07/2022 05:28, Khairil Sitanggang wrote:
Hello Expert:
I just started using python. Below is a simple code. I was trying to check
if, say, NO1 is not in the NODELIST[:].NO
How can I achieve this purpose?
Regards,
-Irfan
class Node:
def __init__(self):
self.NO = 0
self.A = 20
NODE = Node()
NODELIST = []
NODE.NO = 10
NODELIST.append(NODE)
NODE.NO = 20
NODELIST.append(NODE)
NODE.NO = 30
NODELIST.append(NODE)
NO1 = 20
if NO1 not in NODELIST[:].NO ???
No, you can't do it that way. You have to iterate through the list and
check each member individually:
if any(NO1 == N.NO for N in NODELIST):
And another thing: you've created only 1 node, and you're changing it
each time before adding it to the list, so the list ends up with 3
references to the _same_ object.
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