pamhyr: Fixing pep8 and use RD and RG by default at update PK (if exists).

src/Model/Study.py

@@ -270,8 +270,10 @@ class Study(SQLModel):
     def _load(cls, filename):
         new = cls(init_new=False, filename=filename)
 
-        version = new.execute("SELECT value FROM info WHERE key='study_release'")[0]
-        new.status.version = int(version)
+        version = new.execute(
+            "SELECT value FROM info WHERE key='study_release'"
+        )
+        new.status.version = int(version[0])
 
         # TODO: Load metadata
         new.name = new.execute("SELECT value FROM info WHERE key='name'")[0]
@@ -308,7 +310,7 @@ class Study(SQLModel):
         progress = progress if progress is not None else lambda: None
 
         self.execute(
-            "INSERT INTO info VALUES ('study_release', "+
+            "INSERT INTO info VALUES ('study_release', " +
             f"'{self.status.version}')"
         )