3 files changed, 7 insertions, 6 deletions

diff --git a/g4f/Provider/unfinished/ChatAiGpt.py b/g4f/Provider/unfinished/ChatAiGpt.py
index c77afb48..9d050093 100644
--- a/g4f/Provider/unfinished/ChatAiGpt.py
+++ b/g4f/Provider/unfinished/ChatAiGpt.py
@@ -43,10 +43,12 @@ class ChatAiGpt(AsyncGeneratorProvider):
                 async with session.get(f"{cls.url}/", proxy=proxy) as response:
                     response.raise_for_status()
                     response = await response.text()
-                    result = re.search(r'data-nonce=(.*?) data-post-id=([0-9]+)', response)
-                    if not result:
+                    if result := re.search(
+                        r'data-nonce=(.*?) data-post-id=([0-9]+)', response
+                    ):
+                        cls._nonce, cls._post_id = result.group(1), result.group(2)
+                    else:
                         raise RuntimeError("No nonce found")
-                    cls._nonce, cls._post_id = result.group(1), result.group(2)
             prompt = format_prompt(messages)
             data = {
                 "_wpnonce": cls._nonce,
diff --git a/g4f/Provider/unfinished/MikuChat.py b/g4f/Provider/unfinished/MikuChat.py
index bf19631f..970fb0bb 100644
--- a/g4f/Provider/unfinished/MikuChat.py
+++ b/g4f/Provider/unfinished/MikuChat.py
@@ -48,8 +48,7 @@ class MikuChat(AsyncGeneratorProvider):
                 async for line in response.iter_lines():
                     if line.startswith(b"data: "):
                         line = json.loads(line[6:])
-                        chunk = line["choices"][0]["delta"].get("content")
-                        if chunk:
+                        if chunk := line["choices"][0]["delta"].get("content"):
                             yield chunk
 
 def k(e: str, t: int):
diff --git a/g4f/Provider/unfinished/PerplexityAi.py b/g4f/Provider/unfinished/PerplexityAi.py
index 3e096808..e97dbf0d 100644
--- a/g4f/Provider/unfinished/PerplexityAi.py
+++ b/g4f/Provider/unfinished/PerplexityAi.py
@@ -21,7 +21,7 @@ class PerplexityAi(AsyncProvider):
         proxy: str = None,
         **kwargs
     ) -> str:
-        url = cls.url + "/socket.io/?EIO=4&transport=polling"
+        url = f"{cls.url}/socket.io/?EIO=4&transport=polling"
         headers = {
             "Referer": f"{cls.url}/"
         }