assign tuple to multiple vars for better readability
diff --git a/src/cryptography/hazmat/primitives/asymmetric/utils.py b/src/cryptography/hazmat/primitives/asymmetric/utils.py
index a1a4029..36b9080 100644
--- a/src/cryptography/hazmat/primitives/asymmetric/utils.py
+++ b/src/cryptography/hazmat/primitives/asymmetric/utils.py
@@ -16,13 +16,13 @@
 
 
 def decode_rfc6979_signature(signature):
-    data = decoder.decode(signature, asn1Spec=_DSSSigValue())
-    if data[1]:
+    data, remaining = decoder.decode(signature, asn1Spec=_DSSSigValue())
+    if remaining:
         raise ValueError(
             "The signature contains bytes after the end of the ASN.1 sequence."
         )
-    r = int(data[0].getComponentByName('r'))
-    s = int(data[0].getComponentByName('s'))
+    r = int(data.getComponentByName('r'))
+    s = int(data.getComponentByName('s'))
     return (r, s)