diff --git a/duniterpy/constants.py b/duniterpy/constants.py
index 1e182dc26afe5fb18f1d18650aacfdda5c287d9b..6703e382118363be648ac60bc63bdf81038242cc 100644
--- a/duniterpy/constants.py
+++ b/duniterpy/constants.py
@@ -25,10 +25,8 @@ BLOCK_ID_REGEX = "[0-9]+"
 BLOCK_UID_REGEX = "{block_id_regex}-{block_hash_regex}".format(
     block_id_regex=BLOCK_ID_REGEX, block_hash_regex=BLOCK_HASH_REGEX
 )
-CONDITIONS_REGEX = (
-    "(&&|\\|\\|| |[()]|(SIG\\({pubkey_regex}\\)|(XHX\\({hash_regex}\\))))*".format(
-        pubkey_regex=PUBKEY_REGEX, hash_regex=HASH_REGEX
-    )
+CONDITIONS_REGEX = "(&&|\\|\\|| |[()]|(SIG\\({pubkey_regex}\\)|(XHX\\({hash_regex}\\))))*".format(
+    pubkey_regex=PUBKEY_REGEX, hash_regex=HASH_REGEX
 )
 IPV4_REGEX = (
     "(?:(?:[0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}(?:[0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4]["
diff --git a/examples/load_local_blockchain.py b/examples/load_local_blockchain.py
index 260f49fda356397d022de5b7a80a1ba93f4a6121..d59ee89118579f6ac4b0ab7a627237487664ef01 100644
--- a/examples/load_local_blockchain.py
+++ b/examples/load_local_blockchain.py
@@ -3,9 +3,9 @@
 
 from duniterpy.helpers.blockchain import load
 
-bc = load() # gets blockchain iterator
-b = next(bc) # gets block
-b.number # should return 0
+bc = load()  # gets blockchain iterator
+b = next(bc)  # gets block
+b.number  # should return 0
 # you can access all properties of this block through it's duniterpy objects attributes
-next(bc).number # should return 1
-next(bc).number # should return 2 (and so on)
\ No newline at end of file
+next(bc).number  # should return 1
+next(bc).number  # should return 2 (and so on)
diff --git a/examples/send_identity.py b/examples/send_identity.py
index 68bcd4d59069148cf58b9865540a6ab7b3e6ee53..1fc29f8980bd947a6e50f7ef0ba0ec42294d0e6d 100644
--- a/examples/send_identity.py
+++ b/examples/send_identity.py
@@ -34,11 +34,7 @@ BMAS_ENDPOINT = "BMAS g1-test.duniter.org 443"
 ################################################
 
 
-def get_identity_document(
-    current_block: dict,
-    uid: str,
-    key: SigningKey,
-) -> Identity:
+def get_identity_document(current_block: dict, uid: str, key: SigningKey,) -> Identity:
     """
     Get an Identity document
 
diff --git a/examples/send_membership.py b/examples/send_membership.py
index acfb79effd4f081dd7b21bb4c31146ddffe063e6..dfa7139e4ea9c5472ef6ae1cee951310572a7849 100644
--- a/examples/send_membership.py
+++ b/examples/send_membership.py
@@ -35,10 +35,7 @@ BMAS_ENDPOINT = "BMAS g1-test.duniter.org 443"
 
 
 def get_membership_document(
-    membership_type: str,
-    current_block: dict,
-    identity: dict,
-    key: SigningKey,
+    membership_type: str, current_block: dict, identity: dict, key: SigningKey,
 ) -> Membership:
     """
     Get a Membership document