improve/debug python example

pyt/example.py

@@ -1,27 +1,40 @@
 
 import raw_eater
 
-rawlist = [ "sample/Rangerover_Evoque_F-RR534_2019-05-07/ABS_A_Port1.raw",
+rawlist = [ "sample/VehicleSpeed_HS.raw",
+            "sample/Rangerover_Evoque_F-RR534_2019-05-07/ABS_A_Port1.raw",
             "./pyt/example.py",
             "sample/Rangerover_Evoque_F-RR534_2019-05-07/LateralAcceleration_HS.raw" ]
 
 print("")
 
+# convert every single listed file
 for rf in rawlist :
 
-    print("converting " + str(rf) + "...\n")
+    print("converting " + str(rf) + "...\n" + 90*("-") + "\n")
 
+    # setup instance of "raw_eater" and trigger conversion
     eatraw = raw_eater.raweater(rf.encode())
 
-    print(str(eatraw.validity()))
+    # check validity of file format
-
     if eatraw.validity() :
 
-        print(eatraw.channel_name())
+        # show channel name and its unit
-        print(eatraw.unit())
+        entity = eatraw.channel_name().decode()
+        unit = eatraw.unit().decode()
+        print("\nentity: " + str(entity))
+        print("unit:   " + str(unit) + "\n")
 
-        print(eatraw.get_time())
+        # obtain extracted data
-        print(eatraw.get_channel())
+        xt = eatraw.get_time()
+        yt = eatraw.get_channel()
+
+        # show excerpt of data
+        print("time (length: " + str(len(xt)) + ") \n"
+             + str(xt[:10]) + "\n...\n" + str(xt[-10:]) + "\n")
+        yttrunc = [round(y,4) for y in yt]
+        print(str(entity) + " (length: " + str(len(yttrunc)) + ") \n"
+            + str(yttrunc[:10]) + "\n...\n" + str(yttrunc[-10:]) + "\n")
 
         outname = rf.split('/')[-1].replace('raw','csv')
 
@@ -29,6 +42,6 @@ for rf in rawlist :
 
     else :
 
-        print("invalid/corrupt .raw file")
+        print("\nerror: invalid/corrupt .raw file")
 
     print("\n")