Fixing typing errors

Author: scirelli

adafruit_ads1x15/ads1015.py

@@ -61,6 +61,5 @@ def _data_rate_default(self) -> int:
         return 1600
 
     def _conversion_value(self, raw_adc: int) -> int:
-        raw_adc = raw_adc.to_bytes(2, "big")
-        value = struct.unpack(">h", raw_adc)[0]
+        value = struct.unpack(">h", raw_adc.to_bytes(2, "big"))[0]
         return value >> 4

adafruit_ads1x15/ads1115.py

@@ -62,6 +62,5 @@ def _data_rate_default(self) -> int:
         return 128
 
     def _conversion_value(self, raw_adc: int) -> int:
-        raw_adc = raw_adc.to_bytes(2, "big")
-        value = struct.unpack(">h", raw_adc)[0]
+        value = struct.unpack(">h", raw_adc.to_bytes(2, "big"))[0]
         return value

adafruit_ads1x15/ads1x15.py

@@ -15,11 +15,13 @@
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_ADS1x15.git"
 
 import time
-from micropython import const
+
 from adafruit_bus_device.i2c_device import I2CDevice
+from micropython import const
 
 try:
     from typing import Optional
+
     from busio import I2C
     from microcontroller import Pin
 except ImportError:
@@ -69,15 +71,17 @@ def __init__(
         i2c: I2C,
         gain: float = 1,
         data_rate: Optional[int] = None,
-        mode: Mode = Mode.SINGLE,
+        mode: int = Mode.SINGLE,
         address: int = _ADS1X15_DEFAULT_ADDRESS,
     ):
         # pylint: disable=too-many-arguments
         self._last_pin_read = None
         self.buf = bytearray(3)
-        self._data_rate = self._gain = self._mode = None
+        self._gain:float
         self.gain = gain
+        self._data_rate: int
         self.data_rate = self._data_rate_default() if data_rate is None else data_rate
+        self._mode:int
         self.mode = mode
         self.i2c_device = I2CDevice(i2c, address)
 
@@ -128,7 +132,7 @@ def mode(self):
         return self._mode
 
     @mode.setter
-    def mode(self, mode: Mode):
+    def mode(self, mode: int):
         if mode not in (Mode.CONTINUOUS, Mode.SINGLE):
             raise ValueError("Unsupported mode.")
         self._mode = mode

adafruit_ads1x15/analog_in.py

@@ -12,7 +12,8 @@
 """
 
 try:
-    from typing import Optional
+    from typing import Optional, cast
+
     from .ads1x15 import ADS1x15
 except ImportError:
     pass
@@ -37,7 +38,7 @@ def __init__(
         self._negative_pin = negative_pin
         self.is_differential = False
         if negative_pin is not None:
-            pins = (self._pin_setting, self._negative_pin)
+            pins = (self._pin_setting, cast(int, self._negative_pin))
             if pins not in _ADS1X15_DIFF_CHANNELS:
                 raise ValueError(
                     "Differential channels must be one of: {}".format(