Add fixes identified by test cases

precise/functions.py

@@ -82,4 +82,6 @@ def asigmoid(x):
 
 def pdf(x, mu, std):
     """Probability density function (normal distribution)"""
+    if std == 0:
+        return 0
     return (1.0 / (std * sqrt(2 * pi))) * np.exp(-(x - mu) ** 2 / (2 * std ** 2))

precise/scripts/engine.py

@@ -62,6 +62,8 @@ class EngineScript(BaseScript):
                 stdout.buffer.flush()
         except (EOFError, KeyboardInterrupt):
             pass
+        finally:
+            sys.stdout = stdout
 
 
 main = EngineScript.run_main

precise/threshold_decoder.py

@@ -34,9 +34,12 @@ class ThresholdDecoder:
     def decode(self, raw_output: float) -> float:
         if raw_output == 1.0 or raw_output == 0.0:
             return raw_output
-        ratio = (asigmoid(raw_output) - self.min_out) / self.out_range
-        ratio = min(max(ratio, 0.0), 1.0)
-        cp = self.cd[int(ratio * (len(self.cd) - 1) + 0.5)]
+        if self.out_range == 0:
+            cp = int(raw_output > self.min_out)
+        else:
+            ratio = (asigmoid(raw_output) - self.min_out) / self.out_range
+            ratio = min(max(ratio, 0.0), 1.0)
+            cp = self.cd[int(ratio * (len(self.cd) - 1) + 0.5)]
         if cp < self.center:
             return 0.5 * cp / self.center
         else:

runner/precise_runner/runner.py

@@ -107,6 +107,10 @@ class ReadWriteStream(object):
         self.buffer += s
         self.write_event.set()
 
+    def flush(self):
+        """Makes compatible with sys.stdout"""
+        pass
+
 
 class TriggerDetector:
     """