René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Error With Adding Handler","articleBody":"### What kind of feature are you missing? Where do you notice a shortcoming of PTB?\n\n\\Python312\\Lib\\site-packages\\telegram\\ext\\_application.py\", line 1259, in process_update\n    for handlers in self.handlers.values():\n                    ^^^^^^^^^^^^^^^^^^^^^^\nRuntimeError: dictionary changed size during iteration\n\nI want the buttons in that menu to be active when navigating between menus in Telegram, but sometimes ı encounter this problem when I try to add or delete handlers for the buttons.\n\n\n### Describe the solution you'd like\n\nWe need to be able to add or remove handlers while the code is running, this is a big deficiency.\n\n### Describe alternatives you've considered\n\n_No response_\n\n### Additional context\n\n_No response_","author":{"url":"https://github.com/kadir5131","@type":"Person","name":"kadir5131"},"datePublished":"2025-05-25T19:25:33.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/4803/python-telegram-bot/issues/4803"}