update to use Optional types, upgrade version of Blinka to allow including ReadableBuffer type

Author: awordforthat

adafruit_ble_berrymed_pulse_oximeter/adafruit_ble_transparent_uart.py

@@ -10,14 +10,16 @@
 This module provides Services used by MicroChip
 
 """
+
 from adafruit_ble import Service
 from adafruit_ble.uuid import VendorUUID
 from adafruit_ble.characteristics.stream import StreamOut, StreamIn
 
 try:
-    from typing import Union
+    from typing import Optional
 except ImportError:
     pass
+from circuitpython_typing import ReadableBuffer
 
 __version__ = "0.0.0-auto.0"
 __repo__ = (
@@ -48,7 +50,7 @@ class TransparentUARTService(Service):
         buffer_size=64,
     )
 
-    def __init__(self, service: Union[Service, None] = None):
+    def __init__(self, service: Optional[Service] = None):
         super().__init__(service=service)
         self.connectable = True
         if not service:
@@ -59,7 +61,7 @@ def __init__(self, service: Union[Service, None] = None):
             self._tx = self._server_rx
             self._rx = self._server_tx
 
-    def read(self, nbytes: Union[bytes, None] = None) -> Union[bytes, None]:
+    def read(self, nbytes: Optional[bytes] = None) -> Optional[bytes]:
         """
         Read characters. If ``nbytes`` is specified then read at most that many bytes.
         Otherwise, read everything that arrives until the connection times out.
@@ -70,9 +72,7 @@ def read(self, nbytes: Union[bytes, None] = None) -> Union[bytes, None]:
         """
         return self._rx.read(nbytes)
 
-    def readinto(
-        self, buf: bytes, nbytes: Union[bytes, None] = None
-    ) -> Union[int, None]:
+    def readinto(self, buf: bytes, nbytes: Optional[bytes] = None) -> Optional[int]:
         """
         Read bytes into the ``buf``. If ``nbytes`` is specified then read at most
         that many bytes. Otherwise, read at most ``len(buf)`` bytes.
@@ -82,7 +82,7 @@ def readinto(
         """
         return self._rx.readinto(buf, nbytes)
 
-    def readline(self) -> Union[int, None]:
+    def readline(self) -> Optional[bytes]:
         """
         Read a line, ending in a newline character.
 
@@ -100,6 +100,6 @@ def reset_input_buffer(self) -> None:
         """Discard any unread characters in the input buffer."""
         self._rx.reset_input_buffer()
 
-    def write(self, buf: bytes) -> None:
+    def write(self, buf: ReadableBuffer) -> None:
         """Write a buffer of bytes."""
         self._tx.write(buf)

requirements.txt

@@ -2,5 +2,5 @@
 #
 # SPDX-License-Identifier: Unlicense
 
-Adafruit-Blinka
+Adafruit-Blinka>=7.2.3
 adafruit-circuitpython-ble

setup.py

@@ -33,7 +33,7 @@
     # Author details
     author="Adafruit Industries",
     author_email="[email protected]",
-    install_requires=["Adafruit-Blinka", "adafruit-circuitpython-ble"],
+    install_requires=["Adafruit-Blinka>=7.2.3", "adafruit-circuitpython-ble"],
     # Choose your license
     license="MIT",
     # See https://pypi.python.org/pypi?%3Aaction=list_classifiers