fix: ruff check

Signed-off-by: guoguangwu <[email protected]>

Author: testwill

ciphers/rsa_cipher.py

@@ -76,10 +76,9 @@ def encrypt_and_write_to_file(
     key_size, n, e = read_key_file(key_filename)
     if key_size < block_size * 8:
         sys.exit(
-            "ERROR: Block size is {} bits and key size is {} bits. The RSA cipher "
+            f"ERROR: Block size is {block_size * 8} bits and key size is {key_size} bits. The RSA cipher "
             "requires the block size to be equal to or greater than the key size. "
-            "Either decrease the block size or use different keys.".format(
-                block_size * 8, key_size
+            "Either decrease the block size or use different keys."
             )
         )
 
@@ -102,10 +101,9 @@ def read_from_file_and_decrypt(message_filename: str, key_filename: str) -> str:
 
     if key_size < block_size * 8:
         sys.exit(
-            "ERROR: Block size is {} bits and key size is {} bits. The RSA cipher "
+            f"ERROR: Block size is {block_size * 8} bits and key size is {key_size} bits. The RSA cipher "
             "requires the block size to be equal to or greater than the key size. "
-            "Did you specify the correct key file and encrypted file?".format(
-                block_size * 8, key_size
+            "Did you specify the correct key file and encrypted file?"
             )
         )
 

other/lfu_cache.py

@@ -24,8 +24,7 @@ def __init__(self, key: T | None, val: U | None):
         self.prev: DoubleLinkedListNode[T, U] | None = None
 
     def __repr__(self) -> str:
-        return "Node: key: {}, val: {}, freq: {}, has next: {}, has prev: {}".format(
-            self.key, self.val, self.freq, self.next is not None, self.prev is not None
+        return f"Node: key: {self.key}, val: {self.val}, freq: {self.freq}, has next: {self.next is not None}, has prev: {self.prev is not None}"
         )