Change value in a list

[DataTester]

I am trying to add a value (4) to my list through a button, but I don’t see any change on the GUI. However, I see that my list is updated in the Python console and if I refresh the page, I see the correct list displayed. Is it normal?

from taipy import Gui

list_a = [1,2,3]

md = “””
<|Add value|button|on_action=add_value|>

<|{list_a}|>
“””

def add_value(state):
print(“Before”, state.list_a)
state.list_a.append(4)
print(“After”, state.list_a)

Gui(md).run()

Thank you in advance

[Florian Jacta]

Hi,
Taipy doesn’t support this kind of assignment, you should use an ‘equals’ assignment to see changes in real-time. This principle is also used for other elements such as Pandas DataFrame or dictionaries. Your code will look like this:

from taipy import Gui

list_a = [1,2,3]

md = “””
<|Add value|button|on_action=add_value|>

<|{list_a}|>
“””

def add_value(state):
print(“Before”, state.list_a)
state.list_a += [4]
print(“After”, state.list_a)

Gui(md).run()

[Author]

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