pyupgrade --py37-plus **/*.py (#1654)

* pyupgrade --py37-plus **/*.py

* fixup! Format Python code with psf/black push

ciphers/brute_force_caesar_cipher.py

@@ -40,7 +40,7 @@ def decrypt(message):
                 translated = translated + LETTERS[num]
             else:
                 translated = translated + symbol
-        print("Decryption using Key #%s: %s" % (key, translated))
+        print(f"Decryption using Key #{key}: {translated}")
 
 
 def main():

ciphers/hill_cipher.py

@@ -78,7 +78,7 @@ class HillCipher:
         req_l = len(self.key_string)
         if gcd(det, len(self.key_string)) != 1:
             raise ValueError(
-                "discriminant modular {0} of encryption key({1}) is not co prime w.r.t {2}.\nTry another key.".format(
+                "discriminant modular {} of encryption key({}) is not co prime w.r.t {}.\nTry another key.".format(
                     req_l, det, req_l
                 )
             )

ciphers/rsa_cipher.py

@@ -101,7 +101,7 @@ def encryptAndWriteToFile(
     for i in range(len(encryptedBlocks)):
         encryptedBlocks[i] = str(encryptedBlocks[i])
     encryptedContent = ",".join(encryptedBlocks)
-    encryptedContent = "%s_%s_%s" % (len(message), blockSize, encryptedContent)
+    encryptedContent = "{}_{}_{}".format(len(message), blockSize, encryptedContent)
     with open(messageFilename, "w") as fo:
         fo.write(encryptedContent)
     return encryptedContent

ciphers/rsa_key_generator.py

@@ -43,11 +43,11 @@ def makeKeyFiles(name, keySize):
     publicKey, privateKey = generateKey(keySize)
     print("\nWriting public key to file %s_pubkey.txt..." % name)
     with open("%s_pubkey.txt" % name, "w") as fo:
-        fo.write("%s,%s,%s" % (keySize, publicKey[0], publicKey[1]))
+        fo.write("{},{},{}".format(keySize, publicKey[0], publicKey[1]))
 
     print("Writing private key to file %s_privkey.txt..." % name)
     with open("%s_privkey.txt" % name, "w") as fo:
-        fo.write("%s,%s,%s" % (keySize, privateKey[0], privateKey[1]))
+        fo.write("{},{},{}".format(keySize, privateKey[0], privateKey[1]))
 
 
 if __name__ == "__main__":

ciphers/shuffled_shift_cipher.py

@@ -2,7 +2,7 @@ import random
 import string
 
 
-class ShuffledShiftCipher(object):
+class ShuffledShiftCipher:
     """
     This algorithm uses the Caesar Cipher algorithm but removes the option to
     use brute force to decrypt the message.

ciphers/simple_substitution_cipher.py

@@ -17,7 +17,7 @@ def main():
         mode = "decrypt"
         translated = decryptMessage(key, message)
 
-    print("\n%sion: \n%s" % (mode.title(), translated))
+    print("\n{}ion: \n{}".format(mode.title(), translated))
 
 
 def checkValidKey(key):

ciphers/xor_cipher.py

@@ -18,7 +18,7 @@
 """
 
 
-class XORCipher(object):
+class XORCipher:
     def __init__(self, key=0):
         """
                         simple constructor that receives a key or uses