Merge pull request #9 from FoamyGuy/read_pin_return_bool

return bool from read_pin()

Author: FoamyGuy

adafruit_pcf8574.py

@@ -90,7 +90,7 @@ def write_pin(self, pin: int, val: bool) -> None:
 
     def read_pin(self, pin: int) -> bool:
         """Read a single GPIO pin as high/pulled-up or driven low"""
-        return (self.read_gpio() >> pin) & 0x1
+        return ((self.read_gpio() >> pin) & 0x1) == 1
 
 
 """