fix mypy errors and remove typing

mail4one/pop3.py

@@ -6,7 +6,6 @@ import contextvars
 from dataclasses import dataclass
 from hashlib import sha256
 from pathlib import Path
-from typing import ClassVar, List, Set
 from .config import User
 from .pwhash import parse_hash, check_pass, PWInfo
 from asyncio import StreamReader, StreamWriter
@@ -160,7 +159,7 @@ def trans_command_noop(_, __):
     write(ok("Hmm"))
 
 
-async def process_transactions(mails_list: List[MailEntry]):
+async def process_transactions(mails_list: list[MailEntry]):
     mails = MailList(mails_list)
 
     def reset(_, __):
@@ -202,7 +201,7 @@ def get_deleted_items(deleted_items_path: Path):
     return set()
 
 
-def save_deleted_items(deleted_items_path: Path, deleted_items: Set):
+def save_deleted_items(deleted_items_path: Path, deleted_items: set[str]):
     with deleted_items_path.open(mode="w") as f:
         f.writelines(f"{did}\n" for did in deleted_items)
 
@@ -271,14 +270,14 @@ class Config:
         self.loggedin_users: set[str] = set()
 
 
-c_config = contextvars.ContextVar('config')
+c_config: contextvars.ContextVar = contextvars.ContextVar('config')
 
 
 def config() -> Config:
     return c_config.get()
 
 
-c_state = contextvars.ContextVar('state')
+c_state: contextvars.ContextVar = contextvars.ContextVar('state')
 
 
 def state() -> State:
@@ -295,7 +294,7 @@ def make_pop_server_callback(mails_path: Path, users: list[User],
         try:
             return await asyncio.wait_for(start_session(), timeout_seconds)
         finally:
-            stream_writer.close()
+            writer.close()
 
     return session_cb
 
@@ -304,7 +303,7 @@ async def create_pop_server(host: str,
                             port: int,
                             mails_path: Path,
                             users: list[User],
-                            ssl_context: ssl.SSLContext = None,
+                            ssl_context: ssl.SSLContext | None = None,
                             timeout_seconds: int = 60):
     logging.info(
         f"Starting POP3 server {host=}, {port=}, {mails_path=}, {len(users)=}, {ssl_context != None=}, {timeout_seconds=}"

mail4one/poputils.py

@@ -2,7 +2,6 @@ import os
 from dataclasses import dataclass
 from enum import Enum, auto
 from pathlib import Path
-from typing import NewType, List
 
 
 class ClientError(Exception):
@@ -24,9 +23,6 @@ class AuthError(ClientError):
     pass
 
 
-User = NewType('User', str)
-
-
 class Command(Enum):
     CAPA = auto()
     USER = auto()
@@ -65,8 +61,8 @@ def err(arg):
     return f"-ERR {arg}\r\n".encode()
 
 
-def parse_command(line: bytes) -> Request:
-    line = line.decode()
+def parse_command(bline: bytes) -> Request:
+    line = bline.decode()
     if not line.endswith("\r\n"):
         raise ClientError("Invalid line ending")
 
@@ -112,13 +108,13 @@ def files_in_path(path):
     return []
 
 
-def get_mails_list(dirpath: Path) -> List[MailEntry]:
+def get_mails_list(dirpath: Path) -> list[MailEntry]:
     files = files_in_path(dirpath)
     entries = [MailEntry(filename, path) for filename, path in files]
     return entries
 
 
-def set_nid(entries: List[MailEntry]):
+def set_nid(entries: list[MailEntry]):
     entries.sort(reverse=True, key=lambda e: e.c_time)
     entries = sorted(entries, reverse=True, key=lambda e: e.c_time)
     for i, entry in enumerate(entries, start=1):
@@ -131,11 +127,12 @@ def get_mail(entry: MailEntry) -> bytes:
 
 
 class MailList:
-    def __init__(self, entries: List[MailEntry]):
+
+    def __init__(self, entries: list[MailEntry]):
         self.entries = entries
         set_nid(self.entries)
         self.mails_map = {str(e.nid): e for e in entries}
-        self.deleted_uids = set()
+        self.deleted_uids: set[str] = set()
 
     def delete(self, nid: str):
         self.deleted_uids.add(self.mails_map.pop(nid).uid)
@@ -149,4 +146,3 @@ class MailList:
     def compute_stat(self):
         entries = self.get_all()
         return len(entries), sum(entry.size for entry in entries)
-

mail4one/smtp.py

@@ -32,7 +32,7 @@ class MailboxCRLF(Mailbox):
         self.mailbox = MaildirCRLF(mail_dir)
 
 
-def protocol_factory_starttls(dirpath: Path, context: ssl.SSLContext = None):
+def protocol_factory_starttls(dirpath: Path, context: ssl.SSLContext | None = None):
     logging.info("Got smtp client cb")
     try:
         handler = MailboxCRLF(dirpath)
@@ -63,7 +63,7 @@ def protocol_factory(dirpath: Path):
 async def create_smtp_server_starttls(dirpath: Path,
                                       port: int,
                                       host="",
-                                      context: ssl.SSLContext = None):
+                                      context: ssl.SSLContext | None= None):
     loop = asyncio.get_event_loop()
     return await loop.create_server(partial(protocol_factory_starttls, dirpath,
                                             context),
@@ -75,7 +75,7 @@ async def create_smtp_server_starttls(dirpath: Path,
 async def create_smtp_server_tls(dirpath: Path,
                                  port: int,
                                  host="",
-                                 context: ssl.SSLContext = None):
+                                 context: ssl.SSLContext | None= None):
     loop = asyncio.get_event_loop()
     return await loop.create_server(partial(protocol_factory, dirpath),
                                     host=host,