add typehints

template/engine/sampler_sf2.py

@@ -25,6 +25,8 @@ import logging; logger = logging.getLogger(__name__); logger.info("import")
 
 #Python Standard Lib
 import os.path
+from os import PathLike
+from typing import List, Dict, Union
 
 #Third Party
 from calfbox import cbox
@@ -48,9 +50,9 @@ class Sampler_sf2(Data):
     def __init__(self, parentSession, filePath, activePatches, ignoreProgramChanges, mixer:bool, defaultSoundfont=None):
         super().__init__(parentSession)
 
-        self._unlinkOnSave = []
+        self._unlinkOnSave:List[Union[str, PathLike]] = [] #old sf2 files no longer in use.
         self.filePath = filePath
-        self.patchlist = {} #bank:{program:name}
+        self.patchlist:Dict[int,Dict[int, str]] = {} #bank:{program:name}
         self.buffer_ignoreProgramChanges = ignoreProgramChanges
 
         self.midiInput = MidiInput(session=parentSession, portName="all")
@@ -166,7 +168,7 @@ class Sampler_sf2(Data):
     def _convertPatches(self, dictionary:dict):
         """Returns a dict of dicts:
             bank:{program:name}"""
-        result = {}
+        result:Dict[int,Dict[int, str]] = {} #same as self.patchlist
         for value, name in dictionary.items():
             program = value & 127
             bank =  value >> 7