added event emmiter

libp2p/discovery/mdns/utils.py

@@ -1,11 +1,11 @@
 import random
 import string
 
+
 def stringGen(len: int = 63) -> str:
     """Generate a random string of lowercase letters and digits."""
-
     charset = string.ascii_lowercase + string.digits
     result = []
     for _ in range(len):
         result.append(random.choice(charset))
-    return ''.join(result)
+    return "".join(result)