fixed pylint warnings

Change-Id: Ibb3da77e9a53b7293a280659defc029416e30e3b

secop_psi/ppmssim.py

@@ -188,7 +188,7 @@ class PpmsSim:
         else:
             self.status.pos = 5
 
-        self.st = sum([self.status[i] << (i * 4) for i in range(4)])
+        self.st = sum(self.status[i] << (i * 4) for i in range(4))
         self.r1 = self.t * 0.1
         self.i1 = self.t % 10.0
         self.r2 = 1000 / self.t

secop_psi/softcal.py

@@ -144,7 +144,7 @@ class CalCurve:
 
         try:
             parser = cls(**args)
-            with open(filename) as f:
+            with open(filename, encoding='utf-8') as f:
                 for line in f:
                     parser.parse(line)
         except Exception as e: