diff --git a/pySim-shell.py b/pySim-shell.py
index 29ed3a5a..bd7d0c05 100755
--- a/pySim-shell.py
+++ b/pySim-shell.py
@@ -1121,15 +1121,12 @@ class Iso7816Commands(CommandSet):
         fcp_dec = self._cmd.lchan.status()
         self._cmd.poutput_json(fcp_dec)
 
-
 class Proact(ProactiveHandler):
     def receive_fetch(self, pcmd: ProactiveCommand):
         # print its parsed representation
         print(pcmd.decoded)
         # TODO: implement the basics, such as SMS Sending, ...
 
-
-
 option_parser = argparse.ArgumentParser(description='interactive SIM card shell',
                                         formatter_class=argparse.ArgumentDefaultsHelpFormatter)
 argparse_add_reader_args(option_parser)
diff --git a/pySim/card_key_provider.py b/pySim/card_key_provider.py
index 06a6b2bf..24036942 100644
--- a/pySim/card_key_provider.py
+++ b/pySim/card_key_provider.py
@@ -264,7 +264,6 @@ def card_key_provider_register(provider: CardKeyProvider, provider_list=card_key
         raise ValueError("provider is not a card data provider")
     provider_list.append(provider)
 
-
 def card_key_provider_get(fields: list[str], key: str, value: str, provider_list=card_key_providers) -> Dict[str, str]:
     """Query all registered card data providers for card-individual [key] data.
 
@@ -289,7 +288,6 @@ def card_key_provider_get(fields: list[str], key: str, value: str, provider_list
 
     raise ValueError("Unable to find card key data (key=%s, value=%s, fields=%s)" % (key, value, str(fields)))
 
-
 def card_key_provider_get_field(field: str, key: str, value: str, provider_list=card_key_providers) -> str:
     """Query all registered card data providers for a single field.
 
diff --git a/pySim/global_platform/__init__.py b/pySim/global_platform/__init__.py
index 6ff4b286..306746f6 100644
--- a/pySim/global_platform/__init__.py
+++ b/pySim/global_platform/__init__.py
@@ -460,7 +460,6 @@ def decode_select_response(resp_hex: str) -> object:
 # 11.4.2.1
 StatusSubset = Enum(Byte, isd=0x80, applications=0x40, files=0x20, files_and_modules=0x10)
 
-
 # Section 11.4.3.1 Table 11-36
 class LifeCycleState(BER_TLV_IE, tag=0x9f70):
     _construct = CLifeCycleState
@@ -1010,7 +1009,6 @@ class ADF_SD(CardADF):
             self._cmd.lchan.scc.scp = None
             self._cmd.update_prompt()
 
-
 # Card Application of a Security Domain
 class CardApplicationSD(CardApplication):
     __intermediate = True
@@ -1048,7 +1046,6 @@ class GpCardKeyset:
         return "%s(KVN=%u, ENC=%s, MAC=%s, DEK=%s)" % (self.__class__.__name__,
                 self.kvn, b2h(self.enc), b2h(self.mac), b2h(self.dek))
 
-
 def compute_kcv_des(key:bytes) -> bytes:
     # GP Card Spec B.6: For a DES key, the key check value is computed by encrypting 8 bytes, each with
     # value '00', with the key to be checked and retaining the 3 highest-order bytes of the encrypted
diff --git a/pySim/transport/__init__.py b/pySim/transport/__init__.py
index d689a0a8..d3cf8d04 100644
--- a/pySim/transport/__init__.py
+++ b/pySim/transport/__init__.py
@@ -25,7 +25,6 @@ import argparse
 from typing import Optional, Tuple
 from construct import Construct
 from osmocom.utils import b2h, h2b, i2h, Hexstr
-
 from pySim.exceptions import *
 from pySim.utils import SwHexstr, SwMatchstr, ResTuple, sw_match, parse_command_apdu
 from pySim.cat import ProactiveCommand, CommandDetails, DeviceIdentities, Result
@@ -244,7 +243,6 @@ class LinkBase(abc.ABC):
             raise SwMatchError(rv[1], sw.lower(), self.sw_interpreter)
         return rv
 
-
 class LinkBaseTpdu(LinkBase):
 
     # Use the T=0 TPDU format by default as this is the most commonly used transport protocol.
@@ -373,7 +371,6 @@ def argparse_add_reader_args(arg_parser: argparse.ArgumentParser):
 
     return arg_parser
 
-
 def init_reader(opts, **kwargs) -> LinkBase:
     """
     Init card reader driver