Currently our send_* methods can accept either a string or an InputFile (filelike object really). This means that if I wanna for example resend a photo that got send to the bot I can do:

photo = update.message.photo
bot.send_photo(chat_id, photo.file_id)

I'm suggesting we add so it's possible to just do:

photo = update.message.photo
bot.send_photo(chat_id, photo)

So it's possible to send a photo that the bot has received very simply.

If we wanted to take this one step further (which I believe could be pretty cool, we can add a generic send method so something like this would work:

photo = update.message.photo
bot.send(chat_id, photo)

And it would automagically figure out the type of the 2nd argument and send it as such.