diff --git a/examples/max31865_simpletest.py b/examples/max31865_simpletest.py
index 7b9c8a2..6919a20 100644
--- a/examples/max31865_simpletest.py
+++ b/examples/max31865_simpletest.py
@@ -1,21 +1,18 @@
-# Simple demo of the MAX31865 thermocouple amplifier.
-# Will print the temperature every second.
+"""Simple demo of the MAX31865 thermocouple amplifier.
+Will print the temperature every second."""
 import time
-
 import machine
 import adafruit_max31865
 
 
 # Initialize SPI bus and sensor.
-spi=machine.SPI(
-                -1,
-                sck=machine.Pin(14, machine.Pin.OUT),
-                mosi=machine.Pin(13, machine.Pin.OUT),
-                miso=machine.Pin(12, machine.Pin.OUT)
-                )
-spi.init(baudrate=115200, polarity=0, phase=1)
-cs=machine.Pin(2)
-sensor=adafruit_max31865.MAX31865(spi, cs)
+SPI = machine.SPI(-1, sck=machine.Pin(14, machine.Pin.OUT),
+                  mosi=machine.Pin(13, machine.Pin.OUT),
+                  miso=machine.Pin(12, machine.Pin.OUT)
+                  )
+SPI.init(baudrate=115200, polarity=0, phase=1)
+CS = machine.Pin(2)
+SENSOR = adafruit_max31865.MAX31865(SPI, CS)
 # Note you can optionally provide the thermocouple RTD nominal, the reference
 # resistance, and the number of wires for the sensor (2 the default, 3, or 4)
 # with keyword args:
@@ -24,8 +21,8 @@ sensor=adafruit_max31865.MAX31865(spi, cs)
 # Main loop to print the temperature every second.
 while True:
     # Read temperature.
-    temp = sensor.temperature
+    TEMP = SENSOR.temperature
     # Print the value.
-    print("Temperature: {0:0.3f}C".format(temp))
+    print("Temperature: {0:0.3f}C".format(TEMP))
     # Delay for a second.
     time.sleep(1.0)