refractor lib code

lib/Comands.py

@@ -2,10 +2,6 @@ import json
 from os import walk
 
 
-async def set_prefix(guildid: int, prefix: str) -> None:
-    await write_json(guildid, "prefix", prefix)
-
-
 async def list_files(fold: str = 'audio'):
     fl = []
     for filenames in walk(fold):
@@ -17,7 +13,13 @@ async def list_files(fold: str = 'audio'):
     return fl[2]
 
 
-async def read_json(guild: int, param: str):
+async def read_json(guild: int, _param: str) -> int or str:
+    """
+    Reads Json file to determite config strings
+    :param guild: ID of Guild
+    :param _param: Parameter in json file
+    :return: value of parameter
+    """
     with open('prefix.json', 'r', encoding='utf-8') as fp:  # Open the JSON
         try:
             _json = json.load(fp)  # Load the custom prefixes
@@ -27,9 +29,9 @@ async def read_json(guild: int, param: str):
         try:
             guild_conf = _json[f"{guild}"]
             try:
-                parameter = guild_conf[f"{param}"]
+                parameter = guild_conf[f"{_param}"]
             except:
-                pass
+                parameter = None
         except:
             pass