Add @slash_command.autocomplete() example. (#101)

Author: Victorsitou

examples/slash_commands/param.py

@@ -154,7 +154,7 @@ async def constraint(
 async def autocomplete_langs(
     inter: disnake.ApplicationCommandInteraction, string: str
 ) -> List[str]:
-    return list(filter(lambda lang: string in lang.lower(), LANGUAGES))
+    return [lang for lang in LANGUAGES if string in lang.lower()]
 
 
 @bot.slash_command()
@@ -165,6 +165,21 @@ async def autocomplete(
     ...
 
 
+# From version 2.2.0
+# it's possible to create autocomplete options with the decorator @slash_command.autocomplete()
+
+
+@bot.slash_command()
+async def languages(inter: disnake.ApplicationCommandInteraction, language: str):
+    ...
+
+
+@languages.autocomplete("language")
+async def language_autocomp(inter: disnake.ApplicationCommandInteraction, string: str):
+    string = string.lower()
+    return [lang for lang in LANGUAGES if string in lang.lower()]
+
+
 # You can use docstrings to set the description of the command or even
 # the description of options. You should follow the ReStructuredText or numpy format.
 @bot.slash_command()