What function (if any) should I implement so that VScode (or really python) can pick up the value of a user defined object in the VScode variable pane whilst debugging?
In this image you can see that arr shows up as [1, 2, 3, 4]. How can I get the variable node to show its value (1) instead of <__main__.ListNode object at 0x7f4a19eafb20>
Since node is an object, its corresponding __repr__ method is returning that value by default. If you want to see the actual node value instead, then you can add a __repr__ method to ListNode class.
VScode uses the __repr__ method when showing the variable values. Here's a sample ListNode class with __repr__ method added -
class ListNode(object):
def __init__(self, x):
self.val = x
self.next = None
def __repr__(self):
return str(self.val)
node = ListNode(1)
print(node)
If you run this in VScode debug mode you would see the expected node value instead of <__main__.ListNode object at 0x101bed2b0>
Without __repr__ method -
With __repr__ method -
next pointer/handle in the debugger pane
next object under node which would show node linked to next of current node object.__repr__ only modifies the collapsed-text/object-title shown in the debugger, it has no influence on the traversal of objects