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/transport/__init__.py b/pySim/transport/__init__.py
index d689a0a8..5983fcb2 100644
--- a/pySim/transport/__init__.py
+++ b/pySim/transport/__init__.py
@@ -373,7 +373,6 @@ def argparse_add_reader_args(arg_parser: argparse.ArgumentParser):
 
     return arg_parser
 
-
 def init_reader(opts, **kwargs) -> LinkBase:
     """
     Init card reader driver