diff --git a/Introducing_Gemma_M0/Gemma_UART.py b/Introducing_Gemma_M0/Gemma_UART.py
index b5112051a..64be6153a 100644
--- a/Introducing_Gemma_M0/Gemma_UART.py
+++ b/Introducing_Gemma_M0/Gemma_UART.py
@@ -13,7 +13,7 @@ while True:
     data = uart.read(32)  # read up to 32 bytes
     # print(data)          # this is a bytearray type
 
-    if data != None:
+    if data is not None:
         led.value = True
 
         # convert bytearray to string
diff --git a/Larson_Scanner_Shades/Larson_Scanner_Shades.py b/Larson_Scanner_Shades/Larson_Scanner_Shades.py
index d55638c5d..b579cc84a 100644
--- a/Larson_Scanner_Shades/Larson_Scanner_Shades.py
+++ b/Larson_Scanner_Shades/Larson_Scanner_Shades.py
@@ -4,7 +4,7 @@ import board
 import neopixel
 
 numpix = 22  # Number of NeoPixels
-pixpin = board.D1  # Pin where NeoPixels are connected Gemma M0 = D1 | Trinket M0 = D4
+pixpin = board.D1  # NeoPixels pin. For Gemma M0 = D1, Trinket M0 = D4
 strip = neopixel.NeoPixel(pixpin, numpix, brightness=1, auto_write=False)
 pos = 0  # position
 direction = 1  # direction of "eye"
diff --git a/NeoPixie_Dust_Bag/NeoPixie_Dust_Bag.py b/NeoPixie_Dust_Bag/NeoPixie_Dust_Bag.py
index bc208c360..cf704130b 100644
--- a/NeoPixie_Dust_Bag/NeoPixie_Dust_Bag.py
+++ b/NeoPixie_Dust_Bag/NeoPixie_Dust_Bag.py
@@ -13,7 +13,7 @@ except ImportError:
     import random
 
 neo_pin = board.D0  # DIGITAL IO pin for NeoPixel OUTPUT from GEMMA
-touch_pin = board.D2  # DIGITAL IO pin for momentary touch sensor INPUT to GEMMA
+touch_pin = board.D2  # DIGITAL IO pin for momentary touch sensor to GEMMA
 pixel_count = 30  # Number of NeoPixels connected to GEMMA
 delay_sec = .010  # delay between blinks, smaller numbers are faster
 delay_mult = 8  # Randomization multiplier, delay speed of the effect
diff --git a/PMS5003_Air_Quality_Sensor/PMS5003_CircuitPython/main.py b/PMS5003_Air_Quality_Sensor/PMS5003_CircuitPython/main.py
index 2eac70bc9..51ed7d164 100644
--- a/PMS5003_Air_Quality_Sensor/PMS5003_CircuitPython/main.py
+++ b/PMS5003_Air_Quality_Sensor/PMS5003_CircuitPython/main.py
@@ -41,7 +41,9 @@ while True:
 
     frame = struct.unpack(">HHHHHHHHHHHHHH", bytes(buffer[4:]))
 
-    pm10_standard, pm25_standard, pm100_standard, pm10_env, pm25_env, pm100_env, particles_03um, particles_05um, particles_10um, particles_25um, particles_50um, particles_100um, skip, checksum = frame
+    pm10_standard, pm25_standard, pm100_standard, pm10_env, \
+        pm25_env, pm100_env, particles_03um, particles_05um, particles_10um, \
+        particles_25um, particles_50um, particles_100um, skip, checksum = frame
 
     check = sum(buffer[0:30])