diff --git a/dbus_service/dbus-service b/dbus_service/dbus-service
index 031a089..82abb4f 100755
--- a/dbus_service/dbus-service
+++ b/dbus_service/dbus-service
@@ -158,11 +158,9 @@ class Device(dbus.service.Object):
                 logging.exception(e)
                 self.EnrollStatus('enroll-failed', True)
 
-        if index == None:
-            logging.exception(
-                'Unknown finger name passed to enroll? ' +
-                finger_name + ' (' + winbio_name + ')'
-            )
+        if index is None:
+            logging.exception('Unknown finger name passed to enroll? ' + finger_name + ' (' +
+                              winbio_name + ')')
             self.EnrollStatus('enroll-failed', True)
         else:
             thread = Thread(target=run)
diff --git a/scripts/factory-reset.py b/scripts/factory-reset.py
index 9ef5ced..377513f 100644
--- a/scripts/factory-reset.py
+++ b/scripts/factory-reset.py
@@ -1,5 +1,5 @@
-from validitysensor.usb import usb
 from validitysensor.sensor import factory_reset, RebootException
+from validitysensor.usb import usb
 
 try:
     usb.open()
diff --git a/scripts/lsdbus.py b/scripts/lsdbus.py
index 9ad1770..fc66776 100755
--- a/scripts/lsdbus.py
+++ b/scripts/lsdbus.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 
 import dbus.mainloop.glib
+
 dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
 
 bus = dbus.SystemBus()
diff --git a/scripts/prototype.py b/scripts/prototype.py
index 3a64e40..7addf46 100644
--- a/scripts/prototype.py
+++ b/scripts/prototype.py
@@ -2,7 +2,6 @@ from binascii import hexlify
 
 from validitysensor.sensor import sensor
 
-
 # usb.trace_enabled = True
 # tls.trace_enabled = True
 
diff --git a/validitysensor/db.py b/validitysensor/db.py
index e55cbd9..bb21ff1 100644
--- a/validitysensor/db.py
+++ b/validitysensor/db.py
@@ -1,6 +1,6 @@
+import typing
 from binascii import hexlify
 from struct import pack, unpack
-import typing
 
 from .blobs import db_write_enable
 from .flash import call_cleanups
diff --git a/validitysensor/flash.py b/validitysensor/flash.py
index 5030018..54c5240 100644
--- a/validitysensor/flash.py
+++ b/validitysensor/flash.py
@@ -80,7 +80,8 @@ class ModuleInfo:
 
 
 class FirmwareInfo:
-    def __init__(self, major: int, minor: int, buildtime: int, modules: typing.Sequence[ModuleInfo]):
+    def __init__(self, major: int, minor: int, buildtime: int,
+                 modules: typing.Sequence[ModuleInfo]):
         self.major, self.minor, self.buildtime, self.modules = major, minor, buildtime, modules
 
     def __repr__(self):
diff --git a/validitysensor/sensor.py b/validitysensor/sensor.py
index 3a4b91b..a135641 100644
--- a/validitysensor/sensor.py
+++ b/validitysensor/sensor.py
@@ -408,7 +408,8 @@ class Sensor:
 
         return key_line
 
-    def line_update_type_1(self, mode: CaptureMode, chunks: typing.List[typing.List[typing.Union[int, bytes]]]):
+    def line_update_type_1(self, mode: CaptureMode,
+                           chunks: typing.List[typing.List[typing.Union[int, bytes]]]):
         for c in chunks:
             # Timeslot Table 2D
             if c[0] == 0x34:
@@ -511,11 +512,12 @@ class Sensor:
 
         return chunks
 
-    def line_update_type_2(self, mode: CaptureMode, chunks: typing.List[typing.List[typing.Union[int, bytes]]]):
+    def line_update_type_2(self, mode: CaptureMode,
+                           chunks: typing.List[typing.List[typing.Union[int, bytes]]]):
         for c in chunks:
             # patch the 2D params.
             # The following is only needed on some rom versions below 6.5 as reported by cmd_01
-            #if c[0] == 0x2f:
+            # if c[0] == 0x2f:
             #    c[1] = pack('<L', unpack('<L', c[1])[0]*mult)
 
             # Timeslot Table 2D
@@ -589,7 +591,7 @@ class Sensor:
             if pad > 0:
                 l.data += b'\0' * (4 - pad)
 
-        #---------------- Line Update ---------------
+        # ---------------- Line Update ---------------
         line_update = pack('<L', len(lines))
         line_update += b''.join([pack('<LL', l.mask, l.flags) for l in lines])
 
diff --git a/validitysensor/table_types.py b/validitysensor/table_types.py
index 9c0907d..9a409ff 100644
--- a/validitysensor/table_types.py
+++ b/validitysensor/table_types.py
@@ -13,8 +13,8 @@ class SensorTypeInfo:
             if i.sensor_type == sensor_type:
                 return i
 
-    def __init__(self, sensor_type: int, bytes_per_line: int, repeat_multiplier: int, lines_per_calibration_data: int,
-                 line_width: int, calibration_blob: str):
+    def __init__(self, sensor_type: int, bytes_per_line: int, repeat_multiplier: int,
+                 lines_per_calibration_data: int, line_width: int, calibration_blob: str):
         self.sensor_type = sensor_type
         self.repeat_multiplier = repeat_multiplier
         self.lines_per_calibration_data = lines_per_calibration_data
diff --git a/validitysensor/timeslot.py b/validitysensor/timeslot.py
index 46d50c2..b434ddd 100644
--- a/validitysensor/timeslot.py
+++ b/validitysensor/timeslot.py
@@ -1,6 +1,6 @@
+import typing
 from binascii import hexlify
 from struct import unpack, pack
-import typing
 
 codes = {}
 codes[0x0] = "No Operation"
diff --git a/validitysensor/tls.py b/validitysensor/tls.py
index e117334..8673b24 100644
--- a/validitysensor/tls.py
+++ b/validitysensor/tls.py
@@ -197,7 +197,7 @@ class Tls:
         return m
 
     def encrypt(self, b: bytes):
-        #iv = unhexlify('454849acdd075174d6b9e713a957c2e7')
+        # iv = unhexlify('454849acdd075174d6b9e713a957c2e7')
         iv = os.urandom(0x10)
         cipher = Cipher(algorithms.AES(self.encryption_key), modes.CBC(iv), backend=crypto_backend)
         encryptor = cipher.encryptor()
@@ -383,7 +383,7 @@ class Tls:
 
     def make_client_hello(self):
         h = unhexlify('0303')  # TLS 1.2
-        #self.client_random = unhexlify('bc349559ac16c8f8362191395b4d04a435d870315f519eed8777488bc2b9600c')
+        # self.client_random = unhexlify('bc349559ac16c8f8362191395b4d04a435d870315f519eed8777488bc2b9600c')
         self.client_random = os.urandom(0x20)
         h += self.client_random  # client's random
         h += with_1byte_size(unhexlify('00000000000000'))  # session ID
@@ -533,8 +533,8 @@ class Tls:
         self.trace('d=0x%x' % d)
 
         # Someone has reported that x and y are 0 after pairing with the latest windows driver.
-        #pub_key = ec.EllipticCurvePublicNumbers(x, y, ec.SECP256R1())
-        #self.priv_key = ec.EllipticCurvePrivateNumbers(d, pub_key).private_key(crypto_backend)
+        # pub_key = ec.EllipticCurvePublicNumbers(x, y, ec.SECP256R1())
+        # self.priv_key = ec.EllipticCurvePrivateNumbers(d, pub_key).private_key(crypto_backend)
 
         self.priv_key = ec.derive_private_key(d, ec.SECP256R1(), backend=crypto_backend)
 
diff --git a/validitysensor/upload_fwext.py b/validitysensor/upload_fwext.py
index f10a307..6a201b5 100644
--- a/validitysensor/upload_fwext.py
+++ b/validitysensor/upload_fwext.py
@@ -1,7 +1,7 @@
 import logging
+import typing
 from os.path import basename
 from time import ctime
-import typing
 
 from .flash import write_flash_all, write_fw_signature, get_fw_info
 from .sensor import reboot, write_hw_reg32, read_hw_reg32, identify_sensor
@@ -22,7 +22,7 @@ def default_fwext_name():
     return '6_07f_lenovo_mis_qm.xpfwext'
 
 
-def upload_fwext(fw_path: typing.Optional[str]=None):
+def upload_fwext(fw_path: typing.Optional[str] = None):
     fwi = get_fw_info(2)
     if fwi is not None:
         logging.info('Detected firmware version %d.%d (%s))' %
diff --git a/validitysensor/usb.py b/validitysensor/usb.py
index 709d385..1bcca28 100644
--- a/validitysensor/usb.py
+++ b/validitysensor/usb.py
@@ -1,8 +1,8 @@
 import errno
 import logging
+import typing
 from binascii import hexlify, unhexlify
 from struct import unpack
-import typing
 
 import usb.core as ucore
 from usb.core import USBError
diff --git a/validitysensor/winbio_constants.py b/validitysensor/winbio_constants.py
index 264adb6..576620a 100644
--- a/validitysensor/winbio_constants.py
+++ b/validitysensor/winbio_constants.py
@@ -1,36 +1,34 @@
 finger_ids = {
-  # https://github.com/tpn/winsdk-10/blob/9b69fd26ac0c7d0b83d378dba01080e93349c2ed/Include/10.0.16299.0/shared/winbio_types.h#L864-L878
-  "WINBIO_ANSI_381_POS_UNKNOWN": 0,
-  "WINBIO_ANSI_381_POS_RH_THUMB": 1,
-  "WINBIO_ANSI_381_POS_RH_INDEX_FINGER": 2,
-  "WINBIO_ANSI_381_POS_RH_MIDDLE_FINGER": 3,
-  "WINBIO_ANSI_381_POS_RH_RING_FINGER": 4,
-  "WINBIO_ANSI_381_POS_RH_LITTLE_FINGER": 5,
-  "WINBIO_ANSI_381_POS_LH_THUMB": 6,
-  "WINBIO_ANSI_381_POS_LH_INDEX_FINGER": 7,
-  "WINBIO_ANSI_381_POS_LH_MIDDLE_FINGER": 8,
-  "WINBIO_ANSI_381_POS_LH_RING_FINGER": 9,
-  "WINBIO_ANSI_381_POS_LH_LITTLE_FINGER": 10,
+    # https://github.com/tpn/winsdk-10/blob/9b69fd26ac0c7d0b83d378dba01080e93349c2ed/Include/10.0.16299.0/shared/winbio_types.h#L864-L878
+    "WINBIO_ANSI_381_POS_UNKNOWN": 0,
+    "WINBIO_ANSI_381_POS_RH_THUMB": 1,
+    "WINBIO_ANSI_381_POS_RH_INDEX_FINGER": 2,
+    "WINBIO_ANSI_381_POS_RH_MIDDLE_FINGER": 3,
+    "WINBIO_ANSI_381_POS_RH_RING_FINGER": 4,
+    "WINBIO_ANSI_381_POS_RH_LITTLE_FINGER": 5,
+    "WINBIO_ANSI_381_POS_LH_THUMB": 6,
+    "WINBIO_ANSI_381_POS_LH_INDEX_FINGER": 7,
+    "WINBIO_ANSI_381_POS_LH_MIDDLE_FINGER": 8,
+    "WINBIO_ANSI_381_POS_LH_RING_FINGER": 9,
+    "WINBIO_ANSI_381_POS_LH_LITTLE_FINGER": 10,
+    "WINBIO_ANSI_381_POS_RH_FOUR_FINGERS": 13,
+    "WINBIO_ANSI_381_POS_LH_FOUR_FINGERS": 14,
+    "WINBIO_ANSI_381_POS_TWO_THUMBS": 15,
 
-  "WINBIO_ANSI_381_POS_RH_FOUR_FINGERS": 13,
-  "WINBIO_ANSI_381_POS_LH_FOUR_FINGERS": 14,
-  "WINBIO_ANSI_381_POS_TWO_THUMBS": 15,
-
-
-  # https://github.com/tpn/winsdk-10/blob/9b69fd26ac0c7d0b83d378dba01080e93349c2ed/Include/10.0.16299.0/shared/winbio_types.h#L920-L929
-  "WINBIO_FINGER_UNSPECIFIED_POS_01": 0xf5,
-  "WINBIO_FINGER_UNSPECIFIED_POS_02": 0xf6,
-  "WINBIO_FINGER_UNSPECIFIED_POS_03": 0xf7,
-  "WINBIO_FINGER_UNSPECIFIED_POS_04": 0xf8,
-  "WINBIO_FINGER_UNSPECIFIED_POS_05": 0xf9,
-  "WINBIO_FINGER_UNSPECIFIED_POS_06": 0xfa,
-  "WINBIO_FINGER_UNSPECIFIED_POS_07": 0xfb,
-  "WINBIO_FINGER_UNSPECIFIED_POS_08": 0xfc,
-  "WINBIO_FINGER_UNSPECIFIED_POS_09": 0xfd,
-  "WINBIO_FINGER_UNSPECIFIED_POS_10": 0xfe
+    # https://github.com/tpn/winsdk-10/blob/9b69fd26ac0c7d0b83d378dba01080e93349c2ed/Include/10.0.16299.0/shared/winbio_types.h#L920-L929
+    "WINBIO_FINGER_UNSPECIFIED_POS_01": 0xf5,
+    "WINBIO_FINGER_UNSPECIFIED_POS_02": 0xf6,
+    "WINBIO_FINGER_UNSPECIFIED_POS_03": 0xf7,
+    "WINBIO_FINGER_UNSPECIFIED_POS_04": 0xf8,
+    "WINBIO_FINGER_UNSPECIFIED_POS_05": 0xf9,
+    "WINBIO_FINGER_UNSPECIFIED_POS_06": 0xfa,
+    "WINBIO_FINGER_UNSPECIFIED_POS_07": 0xfb,
+    "WINBIO_FINGER_UNSPECIFIED_POS_08": 0xfc,
+    "WINBIO_FINGER_UNSPECIFIED_POS_09": 0xfd,
+    "WINBIO_FINGER_UNSPECIFIED_POS_10": 0xfe
 }
 
 # Store the keys in the reverse order for faster lookups
 finger_names = {}
 for name, index in finger_ids.items():
-  finger_names[index] = name
+    finger_names[index] = name