python_examples: Reformatted, self-checking, executable

* Moved body of each python example to main.  This allows for basic
      load module testing for CI
    * General cleanup of python modules (crlf/tabs/prints/etc)
    * Chmod'ed to 755 to allow running examples without specifying the
      python interpreter
    * Added ctest for loading python2/3 modules
    * Added jniclasscode pragma for java swig interface files.
    * Updated check_examplenames.py module to check all languages vs. a
      cxx example name
    * Added tests for checking python module and test loading
    * Added 'make test' to travis-ci run (run ctests)
    * Print a more meaningful message when not building cxx docs into
      python modules
    * Updated check_clean.py to only check java wrapper files
    * ENABLED ctests for UPM
    * Deleted using_carrays.py python example - this is covered by other
      examples

Signed-off-by: Noel Eck <noel.eck@intel.com>

examples/python/grovemoisture.py

@@ -24,38 +24,40 @@
 import time, sys, signal, atexit
 import pyupm_grovemoisture as upmMoisture
 
-# Instantiate a Grove Moisture sensor on analog pin A0
-myMoisture = upmMoisture.GroveMoisture(0)
+def main():
+    # Instantiate a Grove Moisture sensor on analog pin A0
+    myMoisture = upmMoisture.GroveMoisture(0)
 
+    ## Exit handlers ##
+    # This function stops python from printing a stacktrace when you hit control-C
+    def SIGINTHandler(signum, frame):
+        raise SystemExit
 
-## Exit handlers ##
-# This function stops python from printing a stacktrace when you hit control-C
-def SIGINTHandler(signum, frame):
-	raise SystemExit
+    # This function lets you run code on exit, including functions from myMoisture
+    def exitHandler():
+        print "Exiting"
+        sys.exit(0)
 
-# This function lets you run code on exit, including functions from myMoisture
-def exitHandler():
-	print "Exiting"
-	sys.exit(0)
+    # Register exit handlers
+    atexit.register(exitHandler)
+    signal.signal(signal.SIGINT, SIGINTHandler)
 
-# Register exit handlers
-atexit.register(exitHandler)
-signal.signal(signal.SIGINT, SIGINTHandler)
+    # Values (approximate):
+    # 0-300,   sensor in air or dry soil
+    # 300-600, sensor in humid soil
+    # 600+,    sensor in wet soil or submerged in water
 
+    # Read the value every second and print the corresponding moisture level
+    while(1):
+        moisture_val = myMoisture.value()
+        if (moisture_val >= 0 and moisture_val < 300):
+            result = "Dry"
+        elif (moisture_val >= 300 and moisture_val < 600):
+            result = "Moist"
+        else:
+            result = "Wet"
+        print "Moisture value: {0}, {1}".format(moisture_val, result)
+        time.sleep(1)
 
-# Values (approximate):
-# 0-300,   sensor in air or dry soil
-# 300-600, sensor in humid soil
-# 600+,    sensor in wet soil or submerged in water
-
-# Read the value every second and print the corresponding moisture level
-while(1):
-	moisture_val = myMoisture.value()
-	if (moisture_val >= 0 and moisture_val < 300):
-		result = "Dry"
-	elif (moisture_val >= 300 and moisture_val < 600):
-		result = "Moist"
-	else:
-		result = "Wet"
-	print "Moisture value: {0}, {1}".format(moisture_val, result)
-	time.sleep(1)
+if __name__ == '__main__':
+    main()