core (log): type hints

sat/core/log.py

@@ -21,7 +21,7 @@
 # XXX: this module use standard logging module when possible, but as SàT can work in different cases where logging is not the best choice (twisted, pyjamas, etc), it is necessary to have a dedicated module. Additional feature like environment variables and colors are also managed.
 # TODO: change formatting from "%s" style to "{}" when moved to Python 3
 
-from typing import TYPE_CHECKING, Any, Optional
+from typing import TYPE_CHECKING, Any, Optional, Dict
 
 if TYPE_CHECKING:
     from logging import _ExcInfoType
@@ -34,7 +34,7 @@ from sat.core import exceptions
 import traceback
 
 backend = None
-_loggers = {}
+_loggers: Dict[str, "Logger"] = {}
 handlers = {}
 COLOR_START = '%(color_start)s'
 COLOR_END = '%(color_end)s'
@@ -401,7 +401,7 @@ def memoryGet(size=None):
         raise ValueError('memory output is not used')
     return configure_cls[backend].memoryGet(size)
 
-def getLogger(name=C.LOG_BASE_LOGGER):
+def getLogger(name=C.LOG_BASE_LOGGER) -> Logger:
     try:
         logger_class = configure_cls[backend].LOGGER_CLASS
     except KeyError: