No Container to pop error

[jkissi]

Hello,
I am getting error that I don't understand. Once it happens, it seems like I have to restart my IDE in order to have the chance for it not to occur again. It seem to dislike my file_dialog call but I cannot see how there's a problem with that. Here's the code:

# ============================ #
# global variables
# ============================ #
u_data = []
user_option_storage = {}
state = None
# ============================ #

dpg.create_context()

def cb__gen(sender, app_data):
    print(f"Sender: {sender}")
    print(f"App Data: {app_data}")
    print(f"This is selections: {app_data['selections']}")


def cb__nnse(sender, app_data, user_data):
    """Callback to pass the user option to the compile program and
    then to pass the compiled seStruct object to the pipeline to
    run
    """
    print(f"sender is: {sender}")
    print(f"app_data is: {app_data}")
    print(f"user_data is: {user_data}")



def cb__toggle(sender, app_data, user_data):
    """ Callback for buttons that have the toggle state. The button state is toggled a
    the value of that toggle is passed to the user option storage
    """
    print(f"sender is: {sender}")
    print(f"app_data is: {app_data}")
    print(f"user_data is: {user_data}")

    if user_data is not None:
        # Unpack the user_data that is currently associated with the button
        state, enabled_theme, disabled_theme = user_data
        # Flip the state
        state = not state if state != None else True
        # Apply the appropriate theme
        dpg.bind_item_theme(sender, enabled_theme if state is True else disabled_theme)
        # Update the user_data associated with the button
        dpg.set_item_user_data(sender, (state, enabled_theme, disabled_theme))

        store_parameters(sender, user_option_storage, dtype="bool")


def cb__inputt(sender, app_data, user_data):
    """ Callback for text input fields. The button state is toggled a
    the value of that toggle is passed to the user option storage
    """
    print(f"sender is: {sender}")
    print(f"app_data is: {app_data}")
    print(f"user_data is: {user_data}")
    input_value = dpg.get_value("input_test")
    user_data.append(input_value)


    if user_data is not None:
        # Unpack the user_data that is currently associated with the button
        state, enabled_theme, disabled_theme = user_data
        # Flip the state
        state = not state if state != None else True
        # Apply the appropriate theme
        dpg.bind_item_theme(sender, enabled_theme if state is True else disabled_theme)
        # Update the user_data associated with the button
        dpg.set_item_user_data(sender, (state, enabled_theme, disabled_theme))

        store_parameters(sender, user_option_storage, dtype="bool")


def cb__inputi(sender, app_data, user_data):
    """ Callback for integer input fields. The button state is toggled a
    the value of that toggle is passed to the user option storage
    """
    print(f"sender is: {sender}")
    print(f"app_data is: {app_data}")
    print(f"user_data is: {user_data}")

    if app_data is not None:
        # Unpack the user_data that is currently associated with the button
        data = app_data

        store_parameters(sender, user_option_storage, dtype="int", data=data)
    else:
        print("app data is None. Please try again")
        return


def cb__inputf(sender, app_data, user_data):
    """ Callback for float input fields. The button state is toggled a
    the value of that toggle is passed to the user option storage
    """
    print(f"sender is: {sender}")
    print(f"app_data is: {app_data}")
    print(f"user_data is: {user_data}")

    if app_data is not None:
        # Unpack the user_data that is currently associated with the button
        data = np.round(app_data, decimals=2)

        store_parameters(sender, user_option_storage, dtype="float", data=data)
    else:
        print("app data is None. Please try again")
        return



def store_parameters(ui_element, storage, dtype=None, data=None):
    """ Function to add the value of the ui element to the storage
    to be passed to the pipeline
    """

    # catch-all to return if the correct arguments are not present
    if dtype is None:
        print("no type entered. provide a data entry type for the storage")

        return

    # argument translation
    sender = ui_element
    user_option_storage = storage

    # if a toggle button has been pressed
    if dtype == "bool":
        if sender not in user_option_storage:
            user_option_storage[sender] = True
        else:
            user_option_storage[sender] = not user_option_storage[sender]

    # if any other type of input is used
    else:
        user_option_storage[sender] = data

    print(f"This is the u dict\n{user_option_storage}")


# Define your themes and button somewhere in your code
# - This theme should make the label text on the button white
with dpg.theme() as enabled_theme:
    with dpg.theme_component(dpg.mvAll):
        dpg.add_theme_color(dpg.mvThemeCol_Text, (255, 255, 255), category=dpg.mvThemeCat_Core)
# - This theme should make the label text on the button red
with dpg.theme() as disabled_theme:
    with dpg.theme_component(dpg.mvAll):
        dpg.add_theme_color(dpg.mvThemeCol_Text, (255, 0, 0), category=dpg.mvThemeCat_Core)


# file selector dialog logic
with dpg.file_dialog(label="fd", directory_selector=False, show=False, callback=cb__gen, file_count=100, tag="fd_id"):
    dpg.add_file_extension("", color=(255, 150, 150, 255))
    dpg.add_file_extension(".*")
    dpg.add_file_extension(".ply", color=(255, 255, 0, 255))
    dpg.add_file_extension(".pcd", color=(255, 0, 255, 255))
    dpg.add_file_extension(".xyz", color=(0, 255, 0, 255))

    dpg.add_button(label="fancy file dialog")
    with dpg.child_window(width=100):
        dpg.add_selectable(label="bookmark 1")
        dpg.add_selectable(label="bookmark 2")
        dpg.add_selectable(label="bookmark 3")

# , delay_search=True autosize_x=True,, pos=(100, 100)
# with dpg.add_child_window(label="Console", tag="cons", height=60, autosize_x=True, pos=(100, 100),parent="vp"):
#     dpg.add_text("Hello, world!! ")

with dpg.window(label="Tutorial", tag="tutorial"):
    # user data set when button is created
    # dpg.add_button(label="Print to Terminal", callback=cb__nnse, user_data="Some Data")

    # user data and callback set any time after button has been created
    dpg.add_button(label="Print to Terminal 3", tag="btn2")
    dpg.set_item_callback("btn2", cb__nnse)
    dpg.set_item_user_data("btn2", "Some Extra User Data")
    dpg.add_text("This is a test ")
    dpg.add_input_text(label="input test", tag="input_test", default_value="write something in me")
    dpg.add_text("This is a test ")

    dpg.add_separator()
    dpg.add_spacing(count=10)
    dpg.add_separator()
    dpg.add_text("mode")
    with dpg.group(horizontal=True):
        dpg.add_button(label="experimental run", tag="exp_run", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
        dpg.add_button(label="debug mode", tag="debug", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
        dpg.add_button(label="i mode", tag="interactive_mode", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
    dpg.add_separator()
    dpg.add_text("params")
    dpg.add_input_int(label="number of experiments", tag="noe", callback=cb__inputi, step=1, default_value=1)
    dpg.add_input_float(label="experimental step", tag="exp_factor", callback=cb__inputf, step=0.01, default_value=0.01)
    dpg.add_separator()
    dpg.add_text("network hyperparameters")
    #with dpg.group(horizontal=True):
    dpg.add_input_float(label="rho", tag="rho", callback=cb__inputf, step=0.01, default_value=0.50)
    dpg.add_input_float(label="alpha", tag="alpha", callback=cb__inputf, step=0.01, default_value=0.01)
    #### TODO: Figure out how to make beta's default value None
    #dpg.add_input_float(label="beta", tag="beta", callback=cb__toggle, step=0.01, default_value=0.01)
    dpg.add_separator()
    dpg.add_text("space 1")
    with dpg.group(horizontal=True):
        dpg.add_button(label="pos x", tag="zx", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
        dpg.add_button(label="pos y", tag="zy", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
        dpg.add_button(label="pos z", tag="zz", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
    dpg.add_separator()
    dpg.add_text("space 2")
    with dpg.group(horizontal=True):
        dpg.add_button(label="norm x", tag="znx", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
        dpg.add_button(label="norm y", tag="zny", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
        dpg.add_button(label="norm z", tag="znz", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
    dpg.add_separator()
    dpg.add_text("space 3")
    with dpg.group(horizontal=True):
        dpg.add_button(label="pcur x", tag="zpcx", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
        dpg.add_button(label="pcur y", tag="zpcy", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
        dpg.add_button(label="pcur z", tag="zpcz", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
    dpg.add_separator()
    with dpg.group(horizontal=True):
        dpg.add_button(label="pcur g", tag="zpcg", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))
        dpg.add_button(label="pcur m", tag="zpcm", callback=cb__toggle, user_data=(state, enabled_theme, disabled_theme))

    dpg.add_separator()
    dpg.add_text("files: pointclouds")
    #with dpg.group(horizontal=True):
    dpg.add_button(label="File Selector", tag="fs", callback=lambda: dpg.show_item("fd_id"))

    dpg.add_spacing(count=10)
    dpg.add_separator()
    dpg.add_button(label="run nnse", tag="run", callback=cb__nnse,  user_data=u_data)

dpg.create_viewport(title='Custom Title', width=800, height=600, tag="vp")
dpg.setup_dearpygui()
dpg.show_viewport()
while dpg.is_dearpygui_running():
    # insert here any code you would like to run in the render loop
    # you can manually stop by using stop_dearpygui()

    dpg.render_dearpygui_frame()
dpg.destroy_context()

This give me the following error:

Exception: 
Error:     [1000]
Command:   add alias
Item:      0 
Label:     Not found
Item Type: Unknown
Message:   Alias already exists


The above exception was the direct cause of the following exception:

Traceback (most recent call last):

  File "D:\installs\programs\Anaconda\Anaconda3\envs\nnse\lib\site-packages\dearpygui\dearpygui.py", line 1759, in file_dialog
    widget = internal_dpg.add_file_dialog(label=label, user_data=user_data, use_internal_label=use_internal_label, tag=tag, width=width, height=height, callback=callback, show=show, default_path=default_path, default_filename=default_filename, file_count=file_count, modal=modal, directory_selector=directory_selector, min_size=min_size, max_size=max_size, **kwargs)

SystemError: <built-in function add_file_dialog> returned a result with an error set


During handling of the above exception, another exception occurred:

Exception: Error: [1009] Message: 	No container to pop.


The above exception was the direct cause of the following exception:

Traceback (most recent call last):

  File "d:\dpg_test__new.py", line 171, in <module>
    with dpg.file_dialog(label="fd", directory_selector=False, show=False, callback=cb__gen, file_count=100, tag="fd_id"):

  File "D:\installs\programs\Anaconda\Anaconda3\envs\nnse\lib\contextlib.py", line 113, in __enter__
    return next(self.gen)

  File "D:\installs\programs\Anaconda\Anaconda3\envs\nnse\lib\site-packages\dearpygui\dearpygui.py", line 1763, in file_dialog
    internal_dpg.pop_container_stack()

SystemError: <built-in function pop_container_stack> returned a result with an error set

Can anybody tell me why this is happening??

Thanks in advance
j

[hoffstadt]

From looking through the code, I don't see anything obviously wrong. Could be a bug. Do you mind filing a report with a minimal example?

[0x32767]

TL;DR: you are making two different dpg elements (e.g. a window, button, or something else), with the same tag

For example:

with dpg.window(tag="window_1"):
    ...

with dpg.window(tag="window_2"):
    ...

causes no problems because both windows (in this istance), have a different tag. But:

with dpg.window(tag="same_tag"):
    ...

with dpg.window(tag="same_tag"):
    ...

Causes an error because a tag is shared between elements.
Debugging Tip: check functions in your code that create elements with tags e.g.

def some_callback():
    with window(tag="this is your problem"):
        ...

and are called several times. My fix was to delete these elements instead (dpg.delete_item) instead of hiding them.