Fix for Python 3.10 and Python 10: don't compare to sys.version string

Author: hugovk

src/ecdsa/util.py

@@ -17,7 +17,7 @@
 oid_ecPublicKey = (1, 2, 840, 10045, 2, 1)
 encoded_oid_ecPublicKey = der.encode_oid(*oid_ecPublicKey)
 
-if sys.version > '3':
+if sys.version_info >= (3,):
     def entropy_to_bits(ent_256):
         """Convert a bytestring to string of 0's and 1's"""
         return bin(int.from_bytes(ent_256, 'big'))[2:].zfill(len(ent_256)*8)
@@ -27,7 +27,7 @@ def entropy_to_bits(ent_256):
         return ''.join(bin(ord(x))[2:].zfill(8) for x in ent_256)
 
 
-if sys.version < '2.7':
+if sys.version_info < (2, 7):
     # Can't add a method to a built-in type so we are stuck with this
     def bit_length(x):
         return len(bin(x)) - 2