fixed BZ2File encoding error

pym/calculate/lib/utils/portage.py

@@ -1427,7 +1427,7 @@ class InstalledPackageInfo():
         env_path = path.join(self._pkg_path, 'environment.bz2')
         if path.exists(env_path):
             with bz2.BZ2File(env_path, 'r') as f:
-                for r in self.re_depend.finditer(f.read()):
+                for r in self.re_depend.finditer(f.read().decode("UTF-8")):
                     key, value = r.groups()
                     value = self.re_multispace.sub(" ", value)
                     info[key] = value.strip()

pym/calculate/lib/utils/vardb.py

@@ -59,7 +59,7 @@ class VardbPackage():
                     buf = f.read(10000)
                 else:
                     buf += f.read(10000)
-                if "isz=" in buf:
+                if b"isz=" in buf:
                     self.set_detected(True)
                     return True
         self.set_detected(False)