How to send a photo to a VK conversation with a bot using Python?

Question

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I am newbie and just started to understand pythone. I want to send a photo to a VK conversation using a bot, for example, if the user wrote "photo" and the bot sent a photo, but I just can't figure out how to do it. Please help, and please be very detailed.
Thanks in advance!!!

Answer 1

You need the following VK API methods in order:

• photos.getMessagesUploadServer
  
• post request with file sending ( link )
  
• photos.saveMessagesPhoto
  

Well, sending as an attachment.

Pascal example

procedure TFormMain.SendPic(Stream: TStream; FileName: string; PeerId: Integer; ReplyTo: Integer);
var
  Url: string;
  Response: TVkPhotoUploadResponse;
  Photos: TVkPhotos;
begin
  if VK.Photos.GetMessagesUploadServer(Url, PeerId) then
  begin
    if VK.Photos.Upload(Response, Url, Stream, FileName) then
    try
      if VK.Photos.SaveMessagesPhoto(Photos, Response) then
      try
        if ReplyTo <> 0 then
          VK.Messages.New.PeerId(PeerId).ReplyTo(ReplyTo).Attachment(Photos.ToAttachments).Send.Free
        else
          VK.Messages.New.PeerId(PeerId).Attachment([FileName]).Send.Free;
      finally
        Photos.Free;
      end;
    finally
      Response.Free;
    end;
  end;
end;

Although, in Pascal there is a shorter version

procedure TFormMain.SendPic(const FileNames: TArray<string>; PeerId: Integer);
var
  Photos: TAttachmentArray;
begin
  if VK.Photos.UploadForMessage(Photos, PeerId, FileNames) then
    VK.Messages.New.PeerId(PeerId).Attachment(Photos).Send.Free;
end;