Why am I unable to retrieve context.user_data values with ConversationHandler in python-telegram-bot?

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1

In my ConversationHandler, context.user_data doesn’t retain values across states. Despite storing data via a callback, later steps show None. How can persistence be ensured?

import re
from telegram import Update
from telegram.ext import Application, MessageHandler, filters, ConversationHandler, ContextTypes

STEP_ONE, STEP_TWO = range(2)

async def handle_initial(update: Update, context: ContextTypes.DEFAULT_TYPE):
    entry = update.message.text
    context.user_data['entry'] = entry
    await update.message.reply_text('Now enter more details:')
    return STEP_TWO

async def handle_followup(update: Update, context: ContextTypes.DEFAULT_TYPE):
    print('Stored entry:', context.user_data.get('entry'))
    await update.message.reply_text('Data received successfully!')
    return ConversationHandler.END

conv_handler = ConversationHandler(
    entry_points=[MessageHandler(filters.TEXT, handle_initial)],
    states={
        STEP_TWO: [MessageHandler(filters.TEXT, handle_followup)]
    },
    fallbacks=[]
)
2

In my experience, this issue often arises from overlapping or reinitializing conversation handlers that inadvertently reset the context. It is important to ensure that only one instance of ConversationHandler is used per conversation and that state transitions are handled carefully. Additionally, confirm that the callback functions are being properly registered and that no intermediate state clears or misassigns context.user_data. A systematic review of device logs often reveals if multiple handlers are conflicting, which could lead to loss of stored data when switching between conversation steps.

3

hey, im encountering similar weird behavour. i found that reinitializating the conversation handler after the first call wipes previous data. double check your handlers to make sure you not accidentally reset context.user_data. simplest rememdy was not overloading your async calls. hope it helps.