finalizando trab 1

trabalho1/afreq.py

@@ -1,4 +1,5 @@
 import sys
+import cesar
 
 if len(sys.argv) < 2:
     print("Usage: python3 afreq.py [arquivo]")
@@ -38,10 +39,6 @@ frequencias.reverse()
 caracteres = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
 
 def afreq(string):
-    # determinar a frequencia de cada caractere na string
-    # comparar com a frequencia de cada caractere na lingua portuguesa
-    # calcular a diferenca entre as frequencias
-
     str_freq = {}
     for c in string:
         if not c.isalnum():
@@ -55,9 +52,7 @@ def afreq(string):
     freq_sorted = sorted(str_freq.items(), key=lambda item: item[1])
     freq_sorted = [x[0] for x in freq_sorted]
     freq_sorted.reverse()
-
-    print(freq_sorted[0], frequencias[0])
-    print(freq_sorted[1], frequencias[1])
+    most_freq = freq_sorted[0]
 
     possiveis_chaves = []
 
@@ -66,15 +61,18 @@ def afreq(string):
             continue
 
         index_c = caracteres.index(c)
-        index_freq = caracteres.index(freq_sorted[i])
-
-        print(c, index_c, index_freq)
+        index_freq = caracteres.index(most_freq)
 
         possiveis_chaves.append((index_freq - index_c) % 26) # (indice da freq da letra na str - indice da letra em PT) % ignorar letras maiusculas
 
+        print(freq_sorted[0], c + ' : ' + str(possiveis_chaves[-1]))
+
     return possiveis_chaves
 
 file_str = open(sys.argv[1], 'r').read()
 possiveis_chaves = afreq(file_str)
 
 print(possiveis_chaves)
+
+for key in possiveis_chaves:
+    print(str(key) + ' : ' + cesar.cesar(file_str, -key))

trabalho1/cesar.py

@@ -1,19 +1,5 @@
 import sys
 
-if len(sys.argv) != 4:
-    print("Usage: python3 cesar.py -c/-d [key] [string]")
-    sys.exit(1)
-
-encrypt = True
-if sys.argv[1] == "-d":
-    encrypt = False
-
-key = int(sys.argv[2])
-string = sys.argv[3]
-
-if not encrypt:
-    key *= -1
-
 special_letters = {
     "ã": "a",
     "á": "a",
@@ -52,10 +38,34 @@ def cesar(string, key):
         if letter in special_letters:
             letter = special_letters[letter]
 
+        if letter not in caracteres:
+            continue
+
         index = caracteres.index(letter)
         new_index = (index + key) % len(caracteres)
         new_letter = caracteres[new_index]
 
+        new_string += new_letter
+
+    return new_string
+
+if __name__ == "__main__":
+    if len(sys.argv) != 4:
+        print("Usage: python3 cesar.py -c/-d [key] [string]")
+        sys.exit(1)
+
+    encrypt = True
+    if sys.argv[1] == "-d":
+        encrypt = False
+
+    key = int(sys.argv[2])
+    string = sys.argv[3]
+
+    if not encrypt:
+        key *= -1
+
+    print(cesar(string, key))
+
 # # [A-Z, a-z, 0-9]
 # if ord('0') <= ord(letter) <= ord('9'):
 #     if new_letter > ord('9'):
@@ -72,9 +82,3 @@ def cesar(string, key):
 #         new_letter -= 75 # z + 1 = 0
 #     elif new_letter < ord('a'):
 #         new_letter -= 6 # a - 1 = Z
-
-        new_string += new_letter
-
-    return new_string
-
-print(cesar(string, key))

trabalho1/texto1.txt

@@ -0,0 +1 @@
+0EFP FP 7 P7JMIB QBUQ CLO 9E7O79QBO COBNRBK9V 7K7IVPFP.