diff options
| -rw-r--r-- | glucometerutils/support/hiddevice.py | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/glucometerutils/support/hiddevice.py b/glucometerutils/support/hiddevice.py index e9a5d01..bd35a8f 100644 --- a/glucometerutils/support/hiddevice.py +++ b/glucometerutils/support/hiddevice.py @@ -19,6 +19,8 @@ class HidSession: methods abstracting the HID library. """ + handle_: Optional[BinaryIO] + def __init__( self, usb_id: Optional[Tuple[int, int]], @@ -51,7 +53,7 @@ class HidSession: # If the user passed a device, try opening it. if device: - self.handle_ = open(device, "w+b") # type: Optional[BinaryIO] + self.handle_ = open(device, "w+b") else: self.handle_ = None logging.info("No --device parameter provided, using hidapi library.") |