#!/usr/bin/env python # pylint: disable=E0611,E0213,E1102,C0103,E1101,W0613,R0913,R0904 # # A library that provides a Python interface to the Telegram Bot API # Copyright (C) 2015-2016 # Leandro Toledo de Souza # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Lesser Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Lesser Public License for more details. # # You should have received a copy of the GNU Lesser Public License # along with this program. If not, see [http://www.gnu.org/licenses/]. """This module contains a object that represents a Telegram Bot.""" import functools import logging from telegram import (User, Message, Update, UserProfilePhotos, File, TelegramError, ReplyMarkup, TelegramObject, NullHandler) from telegram.error import InvalidToken from telegram.utils import request from telegram.utils.validate import validate_string logging.getLogger(__name__).addHandler(NullHandler()) class Bot(TelegramObject): """This object represents a Telegram Bot. Attributes: id (int): first_name (str): last_name (str): username (str): name (str): Args: token (str): **kwargs: Arbitrary keyword arguments. Keyword Args: base_url (Optional[str]): """ def __init__(self, token, base_url=None): self.token = self._valid_token(token) if base_url is None: self.base_url = 'https://api.telegram.org/bot%s' % self.token else: self.base_url = base_url + self.token self.base_file_url = 'https://api.telegram.org/file/bot%s' % self.token self.bot = None self.logger = logging.getLogger(__name__) def info(func): """ Returns: """ @functools.wraps(func) def decorator(self, *args, **kwargs): """ decorator """ if not self.bot: self.getMe() result = func(self, *args, **kwargs) return result return decorator @property @info def id(self): """int: """ return self.bot.id @property @info def first_name(self): """str: """ return self.bot.first_name @property @info def last_name(self): """str: """ return self.bot.last_name @property @info def username(self): """str: """ return self.bot.username @property def name(self): """str: """ return '@%s' % self.username def log(func): """ Returns: A telegram.Message instance representing the message posted. """ logger = logging.getLogger(func.__module__) @functools.wraps(func) def decorator(self, *args, **kwargs): """ decorator """ logger.debug('Entering: %s', func.__name__) result = func(self, *args, **kwargs) logger.debug(result) logger.debug('Exiting: %s', func.__name__) return result return decorator def message(func): """ Returns: A telegram.Message instance representing the message posted. """ @functools.wraps(func) def decorator(self, *args, **kwargs): """ decorator """ url, data = func(self, *args, **kwargs) return Bot._post_message(url, data, kwargs) return decorator @staticmethod def _post_message(url, data, kwargs, timeout=None, network_delay=2.): """Posts a message to the telegram servers. Returns: telegram.Message """ if not data.get('chat_id'): raise TelegramError('Invalid chat_id') if kwargs.get('reply_to_message_id'): reply_to_message_id = kwargs.get('reply_to_message_id') data['reply_to_message_id'] = reply_to_message_id if kwargs.get('disable_notification'): disable_notification = kwargs.get('disable_notification') data['disable_notification'] = disable_notification if kwargs.get('reply_markup'): reply_markup = kwargs.get('reply_markup') if isinstance(reply_markup, ReplyMarkup): data['reply_markup'] = reply_markup.to_json() else: data['reply_markup'] = reply_markup result = request.post(url, data, timeout=timeout, network_delay=network_delay) if result is True: return result return Message.de_json(result) @log def getMe(self): """A simple method for testing your bot's auth token. Returns: A telegram.User instance representing that bot if the credentials are valid, None otherwise. """ url = '%s/getMe' % self.base_url result = request.get(url) self.bot = User.de_json(result) return self.bot @log @message def sendMessage(self, chat_id, text, parse_mode=None, disable_web_page_preview=None, **kwargs): """Use this method to send text messages. Args: chat_id: Unique identifier for the message recipient - telegram.Chat id. parse_mode: Send 'Markdown', if you want Telegram apps to show bold, italic and inline URLs in your bot's message. [Optional] text: Text of the message to be sent. The current maximum length is 4096 UTF8 characters. disable_web_page_preview: Disables link previews for links in this message. [Optional] disable_notification: Sends the message silently. iOS users will not receive a notification, Android users will receive a notification with no sound. Other apps coming soon. [Optional] reply_to_message_id: If the message is a reply, ID of the original message. [Optional] reply_markup: Additional interface options. A JSON-serialized object for a custom reply keyboard, instructions to hide keyboard or to force a reply from the user. [Optional] Returns: A telegram.Message instance representing the message posted. """ url = '%s/sendMessage' % self.base_url data = {'chat_id': chat_id, 'text': text} if parse_mode: data['parse_mode'] = parse_mode if disable_web_page_preview: data['disable_web_page_preview'] = disable_web_page_preview return url, data @log @message def forwardMessage(self, chat_id, from_chat_id, message_id): """Use this method to forward messages of any kind. Args: chat_id: Unique identifier for the message recipient - Chat id. from_chat_id: Unique identifier for the chat where the original message was sent - Chat id. message_id: Unique message identifier. disable_notification: Sends the message silently. iOS users will not receive a notification, Android users will receive a notification with no sound. Other apps coming soon. [Optional] Returns: A telegram.Message instance representing the message forwarded. """ url = '%s/forwardMessage' % self.base_url data = {} if chat_id: data['chat_id'] = chat_id if from_chat_id: data['from_chat_id'] = from_chat_id if message_id: data['message_id'] = message_id return url, data @log @message def sendPhoto(self, chat_id, photo, caption=None, **kwargs): """Use this method to send photos. Args: chat_id: Unique identifier for the message recipient - Chat id. photo: Photo to send. You can either pass a file_id as String to resend a photo that is already on the Telegram servers, or upload a new photo using multipart/form-data. caption: Photo caption (may also be used when resending photos by file_id). [Optional] disable_notification: Sends the message silently. iOS users will not receive a notification, Android users will receive a notification with no sound. Other apps coming soon. [Optional] reply_to_message_id: If the message is a reply, ID of the original message. [Optional] reply_markup: Additional interface options. A JSON-serialized object for a custom reply keyboard, instructions to hide keyboard or to force a reply from the user. [Optional] Returns: A telegram.Message instance representing the message posted. """ url = '%s/sendPhoto' % self.base_url data = {'chat_id': chat_id, 'photo': photo} if caption: data['caption'] = caption return url, data @log @message def sendAudio(self, chat_id, audio, duration=None, performer=None, title=None, **kwargs): """Use this method to send audio files, if you want Telegram clients to display them in the music player. Your audio must be in an .mp3 format. On success, the sent Message is returned. Bots can currently send audio files of up to 50 MB in size, this limit may be changed in the future. For backward compatibility, when both fields title and description are empty and mime-type of the sent file is not "audio/mpeg", file is sent as playable voice message. In this case, your audio must be in an .ogg file encoded with OPUS. This will be removed in the future. You need to use sendVoice method instead. Args: chat_id: Unique identifier for the message recipient - Chat id. audio: Audio file to send. You can either pass a file_id as String to resend an audio that is already on the Telegram servers, or upload a new audio file using multipart/form-data. duration: Duration of sent audio in seconds. [Optional] performer: Performer of sent audio. [Optional] title: Title of sent audio. [Optional] disable_notification: Sends the message silently. iOS users will not receive a notification, Android users will receive a notification with no sound. Other apps coming soon. [Optional] reply_to_message_id: If the message is a reply, ID of the original message. [Optional] reply_markup: Additional interface options. A JSON-serialized object for a custom reply keyboard, instructions to hide keyboard or to force a reply from the user. [Optional] Returns: A telegram.Message instance representing the message posted. """ url = '%s/sendAudio' % self.base_url data = {'chat_id': chat_id, 'audio': audio} if duration: data['duration'] = duration if performer: data['performer'] = performer if title: data['title'] = title return url, data @log @message def sendDocument(self, chat_id, document, filename=None, **kwargs): """Use this method to send general files. Args: chat_id: Unique identifier for the message recipient - Chat id. document: File to send. You can either pass a file_id as String to resend a file that is already on the Telegram servers, or upload a new file using multipart/form-data. filename: File name that shows in telegram message (it is usefull when you send file generated by temp module, for example). [Optional] disable_notification: Sends the message silently. iOS users will not receive a notification, Android users will receive a notification with no sound. Other apps coming soon. [Optional] reply_to_message_id: If the message is a reply, ID of the original message. [Optional] reply_markup: Additional interface options. A JSON-serialized object for a custom reply keyboard, instructions to hide keyboard or to force a reply from the user. [Optional] Returns: A telegram.Message instance representing the message posted. """ url = '%s/sendDocument' % self.base_url data = {'chat_id': chat_id, 'document': document} if filename: data['filename'] = filename return url, data @log @message def sendSticker(self, chat_id, sticker, **kwargs): """Use this method to send .webp stickers. Args: chat_id: Unique identifier for the message recipient - Chat id. sticker: Sticker to send. You can either pass a file_id as String to resend a sticker that is already on the Telegram servers, or upload a new sticker using multipart/form-data. disable_notification: Sends the message silently. iOS users will not receive a notification, Android users will receive a notification with no sound. Other apps coming soon. [Optional] reply_to_message_id: If the message is a reply, ID of the original message. [Optional] reply_markup: Additional interface options. A JSON-serialized object for a custom reply keyboard, instructions to hide keyboard or to force a reply from the user. [Optional] Returns: A telegram.Message instance representing the message posted. """ url = '%s/sendSticker' % self.base_url data = {'chat_id': chat_id, 'sticker': sticker} return url, data @log def sendVideo(self, chat_id, video, duration=None, caption=None, timeout=None, **kwargs): """Use this method to send video files, Telegram clients support mp4 videos (other formats may be sent as telegram.Document). Args: chat_id: Unique identifier for the message recipient - Chat id. video: Video to send. You can either pass a file_id as String to resend a video that is already on the Telegram servers, or upload a new video file using multipart/form-data. duration: Duration of sent video in seconds. [Optional] caption: Video caption (may also be used when resending videos by file_id). [Optional] timeout: float. If this value is specified, use it as the definitive timeout (in seconds) for urlopen() operations. [Optional] disable_notification: Sends the message silently. iOS users will not receive a notification, Android users will receive a notification with no sound. Other apps coming soon. [Optional] reply_to_message_id: If the message is a reply, ID of the original message. [Optional] reply_markup: Additional interface options. A JSON-serialized object for a custom reply keyboard, instructions to hide keyboard or to force a reply from the user. [Optional] Returns: A telegram.Message instance representing the message posted. """ url = '%s/sendVideo' % self.base_url data = {'chat_id': chat_id, 'video': video} if duration: data['duration'] = duration if caption: data['caption'] = caption return self._post_message(url, data, kwargs, timeout=timeout) @log @message def sendVoice(self, chat_id, voice, duration=None, **kwargs): """Use this method to send audio files, if you want Telegram clients to display the file as a playable voice message. For this to work, your audio must be in an .ogg file encoded with OPUS (other formats may be sent as Audio or Document). On success, the sent Message is returned. Bots can currently send audio files of up to 50 MB in size, this limit may be changed in the future. Args: chat_id: Unique identifier for the message recipient - Chat id. voice: Audio file to send. You can either pass a file_id as String to resend an audio that is already on the Telegram servers, or upload a new audio file using multipart/form-data. duration: Duration of sent audio in seconds. [Optional] disable_notification: Sends the message silently. iOS users will not receive a notification, Android users will receive a notification with no sound. Other apps coming soon. [Optional] reply_to_message_id: If the message is a reply, ID of the original message. [Optional] reply_markup: Additional interface options. A JSON-serialized object for a custom reply keyboard, instructions to hide keyboard or to force a reply from the user. [Optional] Returns: A telegram.Message instance representing the message posted. """ url = '%s/sendVoice' % self.base_url data = {'chat_id': chat_id, 'voice': voice} if duration: data['duration'] = duration return url, data @log @message def sendLocation(self, chat_id, latitude, longitude, **kwargs): """Use this method to send point on the map. Args: chat_id: Unique identifier for the message recipient - Chat id. latitude: Latitude of location. longitude: Longitude of location. disable_notification: Sends the message silently. iOS users will not receive a notification, Android users will receive a notification with no sound. Other apps coming soon. [Optional] reply_to_message_id: If the message is a reply, ID of the original message. [Optional] reply_markup: Additional interface options. A JSON-serialized object for a custom reply keyboard, instructions to hide keyboard or to force a reply from the user. [Optional] Returns: A telegram.Message instance representing the message posted. """ url = '%s/sendLocation' % self.base_url data = {'chat_id': chat_id, 'latitude': latitude, 'longitude': longitude} return url, data @log @message def sendVenue(self, chat_id, latitude, longitude, title, address, foursquare_id=None, **kwargs): """ Use this method to send information about a venue. Args: chat_id: Unique identifier for the target chat or username of the target channel (in the format @channelusername). latitude: Latitude of the venue. longitude: Longitude of the venue. title: Name of the venue. address: Address of the venue. foursquare_id: Foursquare identifier of the venue. disable_notification: Sends the message silently. iOS users will not receive a notification, Android users will receive a notification with no sound. reply_to_message_id: If the message is a reply, ID of the original message. reply_markup: Additional interface options. A JSON-serialized object for an inline keyboard, custom reply keyboard, instructions to hide reply keyboard or to force a reply from the user. Returns: A telegram.Message instance representing the message posted. """ url = '%s/sendVenue' % self.base_url data = {'chat_id': chat_id, 'latitude': latitude, 'longitude': longitude, 'address': address, 'title': title} if foursquare_id: data['foursquare_id'] = foursquare_id return url, data @log @message def sendContact(self, chat_id, phone_number, first_name, last_name=None, **kwargs): """ Use this method to send phone contacts. Args: chat_id: Unique identifier for the target chat or username of the target channel (in the format @channelusername). phone_number: Contact's phone number. first_name: Contact's first name. last_name: Contact's last name. disable_notification: Sends the message silently. iOS users will not receive a notification, Android users will receive a notification with no sound. reply_to_message_id: If the message is a reply, ID of the original message. reply_markup: Additional interface options. A JSON-serialized object for an inline keyboard, custom reply keyboard, instructions to hide reply keyboard or to force a reply from the user. Returns: A telegram.Message instance representing the message posted. """ url = '%s/sendContact' % self.base_url data = {'chat_id': chat_id, 'phone_number': phone_number, 'first_name': first_name} if last_name: data['last_name'] = last_name return url, data @log @message def sendChatAction(self, chat_id, action): """Use this method when you need to tell the user that something is happening on the bot's side. The status is set for 5 seconds or less (when a message arrives from your bot, Telegram clients clear its typing status). Args: chat_id: Unique identifier for the message recipient - Chat id. action: Type of action to broadcast. Choose one, depending on what the user is about to receive: - ChatAction.TYPING for text messages, - ChatAction.UPLOAD_PHOTO for photos, - ChatAction.UPLOAD_VIDEO for videos, - ChatAction.UPLOAD_AUDIO for audio files, - ChatAction.UPLOAD_DOCUMENT for general files, - ChatAction.FIND_LOCATION for location data. """ url = '%s/sendChatAction' % self.base_url data = {'chat_id': chat_id, 'action': action} return url, data @log def answerInlineQuery(self, inline_query_id, results, cache_time=None, is_personal=None, next_offset=None, switch_pm_text=None, switch_pm_parameter=None): """Use this method to reply to an inline query. Args: inline_query_id (str): Unique identifier for answered query results (list[InlineQueryResult]): A list of results for the inline query Keyword Args: cache_time (Optional[int]): The maximum amount of time the result of the inline query may be cached on the server is_personal (Optional[bool]): Pass True, if results may be cached on the server side only for the user that sent the query. By default, results may be returned to any user who sends the same query. next_offset (Optional[str]): Pass the offset that a client should send in the next query with the same text to receive more results. Pass an empty string if there are no more results or if you don't support pagination. Offset length can't exceed 64 bytes. switch_pm_text (Optional[str]): If passed, clients will display a button with specified text that switches the user to a private chat with the bot and sends the bot a start message with the parameter switch_pm_parameter. switch_pm_parameter (Optional[str]): Parameter for the start message sent to the bot when user presses the switch button. Returns: A boolean if answering was successful """ validate_string(inline_query_id, 'inline_query_id') validate_string(inline_query_id, 'next_offset') url = '%s/answerInlineQuery' % self.base_url results = [res.to_dict() for res in results] data = {'inline_query_id': inline_query_id, 'results': results} if cache_time: data['cache_time'] = int(cache_time) if is_personal: data['is_personal'] = bool(is_personal) if next_offset: data['next_offset'] = next_offset if switch_pm_text: data['switch_pm_text'] = switch_pm_text if switch_pm_parameter: data['switch_pm_parameter'] = switch_pm_parameter result = request.post(url, data) return result @log def getUserProfilePhotos(self, user_id, offset=None, limit=100): """Use this method to get a list of profile pictures for a user. Args: user_id: Unique identifier of the target user. offset: Sequential number of the first photo to be returned. By default, all photos are returned. [Optional] limit: Limits the number of photos to be retrieved. Values between 1-100 are accepted. Defaults to 100. [Optional] Returns: Returns a telegram.UserProfilePhotos object. """ url = '%s/getUserProfilePhotos' % self.base_url data = {'user_id': user_id} if offset: data['offset'] = offset if limit: data['limit'] = limit result = request.post(url, data) return UserProfilePhotos.de_json(result) @log def getFile(self, file_id): """Use this method to get basic info about a file and prepare it for downloading. For the moment, bots can download files of up to 20MB in size. Args: file_id: File identifier to get info about. Returns: Returns a telegram.File object """ url = '%s/getFile' % self.base_url data = {'file_id': file_id} result = request.post(url, data) if result.get('file_path'): result['file_path'] = '%s/%s' % (self.base_file_url, result['file_path']) return File.de_json(result) @log def kickChatMember(self, chat_id, user_id): """Use this method to kick a user from a group or a supergroup. In the case of supergroups, the user will not be able to return to the group on their own using invite links, etc., unless unbanned first. The bot must be an administrator in the group for this to work. Args: chat_id: Unique identifier for the target group or username of the target supergroup (in the format @supergroupusername). user_id: Unique identifier of the target user. Returns: True on success. """ url = '%s/kickChatMember' % self.base_url data = {'chat_id': chat_id, 'user_id': user_id} result = request.post(url, data) return result @log def unbanChatMember(self, chat_id, user_id): """Use this method to unban a previously kicked user in a supergroup. The user will not return to the group automatically, but will be able to join via link, etc. The bot must be an administrator in the group for this to work. Args: chat_id: Unique identifier for the target group or username of the target supergroup (in the format @supergroupusername). user_id: Unique identifier of the target user. Returns: True on success. """ url = '%s/unbanChatMember' % self.base_url data = {'chat_id': chat_id, 'user_id': user_id} result = request.post(url, data) return result @log def answerCallbackQuery(self, callback_query_id, text=None, show_alert=None): """Use this method to send answers to callback queries sent from inline keyboards. The answer will be displayed to the user as a notification at the top of the chat screen or as an alert. Args: callback_query_id: Unique identifier for the query to be answered. text: Text of the notification. If not specified, nothing will be shown to the user. show_alert: If true, an alert will be shown by the client instead of a notification at the top of the chat screen. Defaults to false. Returns: True on success. """ url = '%s/answerCallbackQuery' % self.base_url data = {'callback_query_id': callback_query_id} if text: data['text'] = text if show_alert: data['show_alert'] = show_alert result = request.post(url, data) return result @log def editMessageText(self, text, chat_id=None, message_id=None, inline_message_id=None, parse_mode=None, disable_web_page_preview=None, reply_markup=None): """Use this method to edit text messages sent by the bot or via the bot (for inline bots). Args: text: New text of the message. chat_id: Required if inline_message_id is not specified. Unique identifier for the target chat or username of the target channel (in the format @channelusername). message_id: Required if inline_message_id is not specified. Unique identifier of the sent message. inline_message_id: Required if chat_id and message_id are not specified. Identifier of the inline message. parse_mode: Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or inline URLs in your bot's message. disable_web_page_preview: Disables link previews for links in this message. reply_markup: A JSON-serialized object for an inline keyboard. Returns: Returns a telegram.Message object. """ url = '%s/editMessageText' % self.base_url data = {'text': text} if chat_id: data['chat_id'] = chat_id if message_id: data['message_id'] = message_id if inline_message_id: data['inline_message_id'] = inline_message_id if reply_markup: data['parse_mode'] = parse_mode if reply_markup: data['disable_web_page_preview'] = disable_web_page_preview if reply_markup: data['reply_markup'] = reply_markup result = request.post(url, data) return Message.de_json(result) @log def editMessageCaption(self, caption, chat_id=None, message_id=None, inline_message_id=None, reply_markup=None): """Use this method to edit captions of messages sent by the bot or via the bot (for inline bots). Args: caption: New caption of the message. chat_id: Required if inline_message_id is not specified. Unique identifier for the target chat or username of the target channel (in the format @channelusername). message_id: Required if inline_message_id is not specified. Unique identifier of the sent message. inline_message_id: Required if chat_id and message_id are not specified. Identifier of the inline message. reply_markup: A JSON-serialized object for an inline keyboard. Returns: Returns a telegram.Message object. """ url = '%s/editMessageCaption' % self.base_url data = {'caption': caption} if chat_id: data['chat_id'] = chat_id if message_id: data['message_id'] = message_id if inline_message_id: data['inline_message_id'] = inline_message_id if reply_markup: data['reply_markup'] = reply_markup result = request.post(url, data) return Message.de_json(result) @log def editMessageReplyMarkup(self, reply_markup, chat_id=None, message_id=None, inline_message_id=None): """Use this method to edit only the reply markup of messages sent by the bot or via the bot (for inline bots). Args: reply_markup: A JSON-serialized object for an inline keyboard. chat_id: Required if inline_message_id is not specified. Unique identifier for the target chat or username of the target channel (in the format @channelusername). message_id: Required if inline_message_id is not specified. Unique identifier of the sent message. inline_message_id: Required if chat_id and message_id are not specified. Identifier of the inline message. Returns: Returns a telegram.Message object. """ url = '%s/editMessageReplyMarkup' % self.base_url data = {'reply_markup': reply_markup} if chat_id: data['chat_id'] = chat_id if message_id: data['message_id'] = message_id if inline_message_id: data['inline_message_id'] = inline_message_id result = request.post(url, data) return Message.de_json(result) @log def getUpdates(self, offset=None, limit=100, timeout=0, network_delay=2.): """Use this method to receive incoming updates using long polling. Args: offset: Identifier of the first update to be returned. Must be greater by one than the highest among the identifiers of previously received updates. By default, updates starting with the earliest unconfirmed update are returned. An update is considered confirmed as soon as getUpdates is called with an offset higher than its update_id. limit: Limits the number of updates to be retrieved. Values between 1-100 are accepted. Defaults to 100. timeout: Timeout in seconds for long polling. Defaults to 0, i.e. usual short polling. network_delay: Additional timeout in seconds to allow the response from Telegram to take some time when using long polling. Defaults to 2, which should be enough for most connections. Increase it if it takes very long for data to be transmitted from and to the Telegram servers. Returns: A list of telegram.Update objects are returned. """ url = '%s/getUpdates' % self.base_url data = {} if offset: data['offset'] = offset if limit: data['limit'] = limit if timeout: data['timeout'] = timeout result = request.post(url, data, network_delay=network_delay) if result: self.logger.debug( 'Getting updates: %s', [u['update_id'] for u in result]) else: self.logger.debug('No new updates found.') return [Update.de_json(x) for x in result] @log def setWebhook(self, webhook_url=None, certificate=None): """Use this method to specify a url and receive incoming updates via an outgoing webhook. Whenever there is an update for the bot, we will send an HTTPS POST request to the specified url, containing a JSON-serialized Update. In case of an unsuccessful request, we will give up after a reasonable amount of attempts. Args: url: HTTPS url to send updates to. Use an empty string to remove webhook integration Returns: True if successful else TelegramError was raised """ url = '%s/setWebhook' % self.base_url data = {} if webhook_url: data['url'] = webhook_url if certificate: data['certificate'] = certificate result = request.post(url, data) return result @staticmethod def de_json(data): pass def to_dict(self): """ Returns: dict: """ data = {'id': self.id, 'username': self.username, 'first_name': self.username} if self.last_name: data['last_name'] = self.last_name return data def __reduce__(self): return (self.__class__, (self.token, self.base_url.replace(self.token, ''))) @staticmethod def _valid_token(token): """a very basic validation on token""" left, sep, _right = token.partition(':') if (not sep) or (not left.isdigit()) or (len(left) < 3): raise InvalidToken() return token