Add missing type annotations

adafruit_tsl2561.py

@@ -33,6 +33,12 @@
 from adafruit_bus_device.i2c_device import I2CDevice
 from micropython import const
 
+try:
+    from typing import Optional, Tuple, Union
+    from busio import I2C
+except ImportError:
+    pass
+
 __version__ = "0.0.0+auto.0"
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_TSL2561.git"
 
@@ -60,66 +66,66 @@
 class TSL2561:
     """Class which provides interface to TSL2561 light sensor."""
 
-    def __init__(self, i2c, address=_DEFAULT_ADDRESS):
+    def __init__(self, i2c: I2C, address: int = _DEFAULT_ADDRESS) -> None:
         self.buf = bytearray(3)
         self.i2c_device = I2CDevice(i2c, address)
         partno, revno = self.chip_id
         # data sheet says TSL2561 = 0001, reality says 0101
         if not partno == 5:
             raise RuntimeError(
-                "Failed to find TSL2561! Part 0x%x Rev 0x%x" % (partno, revno)
+                f"Failed to find TSL2561! Part {hex(partno)} Rev {hex(revno)}"
             )
         self.enabled = True
 
     @property
-    def chip_id(self):
+    def chip_id(self) -> Tuple[int, int]:
         """A tuple containing the part number and the revision number."""
         chip_id = self._read_register(_REGISTER_ID)
         partno = (chip_id >> 4) & 0x0F
         revno = chip_id & 0x0F
         return (partno, revno)
 
     @property
-    def enabled(self):
+    def enabled(self) -> bool:
         """The state of the sensor."""
         return (self._read_register(_REGISTER_CONTROL) & 0x03) != 0
 
     @enabled.setter
-    def enabled(self, enable):
+    def enabled(self, enable: bool) -> None:
         """Enable or disable the sensor."""
         if enable:
             self._enable()
         else:
             self._disable()
 
     @property
-    def lux(self):
+    def lux(self) -> Optional[float]:
         """The computed lux value or None when value is not computable."""
         return self._compute_lux()
 
     @property
-    def broadband(self):
+    def broadband(self) -> int:
         """The broadband channel value."""
         return self._read_broadband()
 
     @property
-    def infrared(self):
+    def infrared(self) -> int:
         """The infrared channel value."""
         return self._read_infrared()
 
     @property
-    def luminosity(self):
+    def luminosity(self) -> Tuple[int, int]:
         """The overall luminosity as a tuple containing the broadband
         channel and the infrared channel value."""
         return (self.broadband, self.infrared)
 
     @property
-    def gain(self):
+    def gain(self) -> int:
         """The gain. 0:1x, 1:16x."""
         return self._read_register(_REGISTER_TIMING) >> 4 & 0x01
 
     @gain.setter
-    def gain(self, value):
+    def gain(self, value: int) -> None:
         """Set the gain. 0:1x, 1:16x."""
         value &= 0x01
         value <<= 4
@@ -130,13 +136,13 @@ def gain(self, value):
             i2c.write(self.buf, end=2)
 
     @property
-    def integration_time(self):
+    def integration_time(self) -> int:
         """The integration time. 0:13.7ms, 1:101ms, 2:402ms, or 3:manual"""
         current = self._read_register(_REGISTER_TIMING)
         return current & 0x03
 
     @integration_time.setter
-    def integration_time(self, value):
+    def integration_time(self, value: int) -> None:
         """Set the integration time. 0:13.7ms, 1:101ms, 2:402ms, or 3:manual."""
         value &= 0x03
         current = self._read_register(_REGISTER_TIMING)
@@ -146,50 +152,50 @@ def integration_time(self, value):
             i2c.write(self.buf, end=2)
 
     @property
-    def threshold_low(self):
+    def threshold_low(self) -> int:
         """The low light interrupt threshold level."""
         low, high = self._read_register(_REGISTER_TH_LOW, 2)
         return high << 8 | low
 
     @threshold_low.setter
-    def threshold_low(self, value):
+    def threshold_low(self, value: int) -> None:
         self.buf[0] = _COMMAND_BIT | _WORD_BIT | _REGISTER_TH_LOW
         self.buf[1] = value & 0xFF
         self.buf[2] = (value >> 8) & 0xFF
         with self.i2c_device as i2c:
             i2c.write(self.buf)
 
     @property
-    def threshold_high(self):
+    def threshold_high(self) -> int:
         """The upper light interrupt threshold level."""
         low, high = self._read_register(_REGISTER_TH_HIGH, 2)
         return high << 8 | low
 
     @threshold_high.setter
-    def threshold_high(self, value):
+    def threshold_high(self, value: int) -> None:
         self.buf[0] = _COMMAND_BIT | _WORD_BIT | _REGISTER_TH_HIGH
         self.buf[1] = value & 0xFF
         self.buf[2] = (value >> 8) & 0xFF
         with self.i2c_device as i2c:
             i2c.write(self.buf)
 
     @property
-    def cycles(self):
+    def cycles(self) -> int:
         """The number of integration cycles for which an out of bounds
         value must persist to cause an interrupt."""
         value = self._read_register(_REGISTER_INT_CTRL)
         return value & 0x0F
 
     @cycles.setter
-    def cycles(self, value):
+    def cycles(self, value: int) -> None:
         current = self._read_register(_REGISTER_INT_CTRL)
         self.buf[0] = _COMMAND_BIT | _REGISTER_INT_CTRL
         self.buf[1] = current | (value & 0x0F)
         with self.i2c_device as i2c:
             i2c.write(self.buf, end=2)
 
     @property
-    def interrupt_mode(self):
+    def interrupt_mode(self) -> int:
         """The interrupt mode selection.
 
         ==== =========================
@@ -205,20 +211,20 @@ def interrupt_mode(self):
         return (self._read_register(_REGISTER_INT_CTRL) >> 4) & 0x03
 
     @interrupt_mode.setter
-    def interrupt_mode(self, value):
+    def interrupt_mode(self, value: int) -> None:
         current = self._read_register(_REGISTER_INT_CTRL)
         self.buf[0] = _COMMAND_BIT | _REGISTER_INT_CTRL
         self.buf[1] = (current & 0x0F) | ((value & 0x03) << 4)
         with self.i2c_device as i2c:
             i2c.write(self.buf, end=2)
 
-    def clear_interrupt(self):
+    def clear_interrupt(self) -> None:
         """Clears any pending interrupt."""
         self.buf[0] = 0xC0
         with self.i2c_device as i2c:
             i2c.write(self.buf, end=1)
 
-    def _compute_lux(self):
+    def _compute_lux(self) -> Optional[float]:
         """Based on datasheet for FN package."""
         ch0, ch1 = self.luminosity
         if ch0 == 0:
@@ -247,36 +253,34 @@ def _compute_lux(self):
         lux *= _TIME_SCALE[self.integration_time]
         return lux
 
-    def _enable(self):
+    def _enable(self) -> None:
         self._write_control_register(_CONTROL_POWERON)
 
-    def _disable(self):
+    def _disable(self) -> None:
         self._write_control_register(_CONTROL_POWEROFF)
 
-    def _read_register(self, reg, count=1):
-        # pylint: disable=no-else-return
-        # Disable should be removed when refactor can be tested
+    def _read_register(self, reg: int, count: int = 1) -> Union[int, Tuple[int, int]]:
+        if count not in (1, 2):
+            raise RuntimeError("Can only read up to 2 consecutive registers")
         self.buf[0] = _COMMAND_BIT | reg
         if count == 2:
             self.buf[0] |= _WORD_BIT
         with self.i2c_device as i2c:
             i2c.write_then_readinto(self.buf, self.buf, out_end=1, in_start=1)
         if count == 1:
             return self.buf[1]
-        elif count == 2:
-            return self.buf[1], self.buf[2]
-        return None
+        return self.buf[1], self.buf[2]
 
-    def _write_control_register(self, reg):
+    def _write_control_register(self, reg: int) -> None:
         self.buf[0] = _COMMAND_BIT | _REGISTER_CONTROL
         self.buf[1] = reg
         with self.i2c_device as i2c:
             i2c.write(self.buf, end=2)
 
-    def _read_broadband(self):
+    def _read_broadband(self) -> int:
         low, high = self._read_register(_REGISTER_CHAN0_LOW, 2)
         return high << 8 | low
 
-    def _read_infrared(self):
+    def _read_infrared(self) -> int:
         low, high = self._read_register(_REGISTER_CHAN1_LOW, 2)
         return high << 8 | low