Almost done.

telebot/__init__.py

@@ -415,6 +415,9 @@ class TeleBot:
         """
         return self.send_message(message.chat.id, text, reply_to_message_id=message.message_id, **kwargs)
 
+    def answer_inline_query(self, inline_query_id, results, cache_time=None, is_personal=None, next_offset=None):
+        return apihelper.answer_inline_query(self.token, inline_query_id, results, cache_time, is_personal, next_offset)
+
     def register_for_reply(self, message, callback):
         """
         Registers a callback function to be notified when a reply to `message` arrives.

telebot/apihelper.py

@@ -258,11 +258,34 @@ def get_method_by_type(data_type):
         return r'sendSticker'
 
 
+def answer_inline_query(token, inline_query_id, results, cache_time=None, is_personal=None, next_offset=None):
+    method_url = 'answerInlineQuery'
+    payload = {'inline_query_id': inline_query_id, 'results': _convert_inline_results(results)}
+    if cache_time:
+        payload['cache_time'] = cache_time
+    if is_personal:
+        payload['is_personal'] = is_personal
+    if next_offset:
+        payload['next_offset'] = next_offset
+    return _make_request(token, method_url, params=payload)
+
+
+def _convert_inline_results(results):
+    ret = ''
+    for r in results:
+        if isinstance(r, types.JsonSerializable):
+            ret = ret + r.to_json() + ','
+    if len(ret) > 0:
+        ret = ret[:-1]
+    return '[' + ret + ']'
+
+
 def _convert_markup(markup):
     if isinstance(markup, types.JsonSerializable):
         return markup.to_json()
     return markup
 
+
 class ApiException(Exception):
     """
     This class represents an Exception thrown when a call to the Telegram API fails.