fix issues reported by mypy

Author: thomas-mangin

src/exabgp/application/healthcheck.py

@@ -202,7 +202,7 @@ def loopback_ips(label, label_only, label_exact_match):
         )
         cmd = subprocess.Popen('/sbin/ifconfig lo0'.split(), shell=False, stdout=subprocess.PIPE)
         labelre = re.compile(r'')
-    for line in (cmd.stdout or []):
+    for line in cmd.stdout or []:
         line = line.decode('ascii', 'ignore').strip()
         mo = ipre.match(line)
         if not mo:

src/exabgp/bgp/message/update/nlri/qualifier/path.py

@@ -13,6 +13,8 @@
 
 
 class PathInfo(object):
+    NOPATH: 'PathInfo | None' = None
+
     def __init__(self, packed=None, integer=None, ip=None):
         if packed:
             self.path_info = packed

src/exabgp/cli/__init__.py

@@ -3,12 +3,12 @@ class msg(dict):
     help = '[help]'
     validation = '[validation]'
 
-    keys = [command, help, validation]
+    _keys = [command, help, validation]
 
     def __init__(self):
         self[self.help] = ''
         self[self.command] = ''
         self[self.validation] = ''
 
     def __str__(self):
-        return ' '.join(f'{k}:{self[k]}' for k in self.keys if self[k])
+        return ' '.join(f'{k}:{self[k]}' for k in self._keys if self[k])

src/exabgp/netlink/sequence.py

@@ -9,7 +9,7 @@
 
 
 class Sequence(int):
-    _instance = dict()
+    _instance: dict[str, int] = dict()
 
     def __new__(cls):
         cls._instance['next'] = cls._instance.get('next', 0) + 1

src/exabgp/reactor/api/command/command.py

@@ -9,9 +9,9 @@
 
 
 class Command(object):
-    callback = {'text': {}, 'json': {}, 'neighbor': {}, 'options': {}}
+    callback: dict[str, dict] = {'text': {}, 'json': {}, 'neighbor': {}, 'options': {}}
 
-    functions = []
+    functions: list[str] = []
 
     @classmethod
     def register(cls, name, neighbor=True, options=None, json_support=False):