Convert lists to generators where possible

tangoinfo.py

@@ -128,7 +128,7 @@ class TangoInfoTagger:
 
         if barcode in self.albumpage_cache:
             if self.albumpage_cache[barcode].get(tint):
-                for field in ["genre", "date", "vocal"]:
+                for field in ("genre", "date", "vocal"):
                     # Do no overwrite with empty data
                     if not self.albumpage_cache[barcode][tint].get(field):
                         continue
@@ -227,14 +227,14 @@ class TangoInfoTagger:
                     self.album_remove_request(album)
                     continue
 
-                for field in ["genre", "date", "vocal"]:
+                for field in ("genre", "date", "vocal"):
                     # Write track metadata
                     if self.albumpage_cache[barcode][tint].get(field):
                         tm[field] = self.albumpage_cache[barcode][tint][field]
 
                 for file in track.iterfiles():
                     fm = file.metadata
-                    for field in ["genre", "date", "vocal"]:
+                    for field in ("genre", "date", "vocal"):
                         if not self.albumpage_cache[barcode][tint].get(field):
                             continue
                         # Write file metadata
@@ -284,7 +284,7 @@ class TangoInfoTagger:
         table = table[0]  # re.findall() returns a list
 
         # Content inside of <tr> elements
-        trcontent = [match.groups()[0] for match in tr_regex.finditer(table)]
+        trcontent = (match.groups()[0] for match in tr_regex.finditer(table))
 
         page_structure_warned = False  # Ratelimit warnings