Looks like you're hitting two common pitfalls with the Telegram Bot API—let's break them down and fix each one step by step.

1. Fixing the ForceReply Not Showing Up #

Your current code has two key issues causing ForceReply to fail:

• You’re passing 'ForceReply' as a raw string instead of the structured JSON object the API expects
• You’re putting reply_markup in the files dictionary, but it belongs in form data (not part of the file upload payload)

The Telegram API requires reply_markup to be a JSON string defining the ForceReply configuration. Here's the corrected code to send your photo with working ForceReply:

import requests
import json

# Replace these with your actual values
UserID = "your_user_id_here"
BOT_API_TOKEN = "your_bot_token_here"
send_photo_url = f"https://api.telegram.org/bot{BOT_API_TOKEN}/sendPhoto"

# Build the ForceReply markup as a serialized JSON string
force_reply_markup = json.dumps({
    "force_reply": True,
    "selective": True  # Optional but recommended: only forces reply to this specific message
})

# Files only contains the photo file; other parameters go in the data dict
files = {'photo': open("/home/preetham/Downloads/selenium/cap.jpg", 'rb')}
data = {
    "chat_id": UserID,
    "reply_markup": force_reply_markup
}

# Send the request and capture the sent message's ID (we'll need this later)
status = requests.post(send_photo_url, files=files, data=data)
if status.ok:
    sent_photo_message_id = status.json()['result']['message_id']
    print(f"Photo sent successfully! Message ID: {sent_photo_message_id}")
else:
    print(f"Failed to send photo: {status.text}")

This will now properly trigger the "Reply" prompt tied directly to your sent photo.

2. Retrieving the Correct Reply to the Photo #

Your polling code has two critical flaws:

• It doesn’t use the offset parameter, so it keeps fetching old, already processed messages
• It doesn’t verify if the reply is actually in response to your photo (it just grabs the last message in the history)

Here's the fixed polling logic that addresses both issues:

import time

get_updates_url = f"https://api.telegram.org/bot{BOT_API_TOKEN}/getUpdates"
offset = 0  # Tracks the last processed update to avoid re-reading old messages
reply_string = ""  # Variable to store the user's reply

while True:
    try:
        # Fetch only new updates using the offset parameter
        response = requests.get(get_updates_url, params={"offset": offset, "timeout": 30})
        response.raise_for_status()  # Throw an error if the API request fails
        updates = response.json()['result']
        
        for update in updates:
            update_id = update['update_id']
            # Update offset so we skip this update next time
            offset = update_id + 1
            
            # Check if this update is a message that's a reply to another message
            if 'message' in update and 'reply_to_message' in update['message']:
                incoming_message = update['message']
                # Verify the reply is targeting our sent photo
                if incoming_message['reply_to_message']['message_id'] == sent_photo_message_id:
                    # Ensure the reply is text (handle cases where user sends stickers/etc.)
                    if 'text' in incoming_message:
                        reply_string = incoming_message['text']
                        print(f"Received reply to your photo: {reply_string}")
                        exit()  # Exit loop once we get the correct reply
        
        time.sleep(1)  # Avoid hitting Telegram's API rate limits
    except Exception as e:
        print(f"Error fetching updates: {str(e)}")
        time.sleep(2)

Key Improvements: #

• Offset Management: By setting offset to update_id + 1, we tell the API to only send us updates we haven’t processed yet—no more old message repeats.
• Reply Validation: We check that the message is a reply, and that it’s replying to the exact photo message we sent (matching the sent_photo_message_id we captured earlier).
• Error Handling: Added basic error handling and rate limiting to make the polling more robust.

Quick Notes: #

• Fix the typo in your getUpdates URL: it should start with bot{BOT_API_TOKEN} (you missed the bot prefix and had a mismatched bracket).
• Use requests.get for getUpdates instead of post—it’s the proper HTTP method for fetching data.

内容的提问来源于stack exchange，提问作者preethh