Select Mass Position channels

Make MSeed and Reftek read according to the selected mass position 123/456 #22 (closed)

sohstationviewer/view/util/functions.py

@@ -214,7 +214,6 @@ def check_masspos(mp_data: Dict[str, Dict], sel_key: Union[tuple, str],
     :param include_mp123: if mass position channels 1,2,3 are requested
     :param include_mp456: if mass position channels 4,5,6 are requested
     """
-    not_included_mp = []
     included_mp = []
     for chan_id in mp_data.keys():
         included_mp.append(chan_id[-1])
@@ -225,9 +224,7 @@ def check_masspos(mp_data: Dict[str, Dict], sel_key: Union[tuple, str],
     if include_mp456:
         req_mp += ['4', '5', '6']
 
-    for mp in req_mp:
-        if mp not in included_mp:
-            not_included_mp.append(mp)
+    not_included_mp = [mp for mp in req_mp if mp not in included_mp]
 
     if not_included_mp != []:
         raise Exception(f"Data set {sel_key} doesn't include mass position "