finish three beta

sdwh · sdwh · commit d663195aa96e · 2015-06-04T17:14:01.000+08:00
diff --git a/[beta]Caesar Cipher.py b/[beta]Caesar Cipher.py
@@ -0,0 +1,18 @@
+import string
+def caesar(s, shift):
+    transDict = {}
+    alpha = string.ascii_lowercase
+    alphaTrans = alpha[shift:] + alpha[:shift]
+    for key,value in zip(string.ascii_lowercase,alphaTrans):
+        transDict[key] = value
+        transDict[key.upper()] = value.upper()
+
+    return ''.join([transDict[c] if c in transDict else c for c in s])
+
+
+
+
+
+
+
+
diff --git a/[beta]Fibonacci, Tribonacci and friends.py b/[beta]Fibonacci, Tribonacci and friends.py
@@ -0,0 +1,7 @@
+def Xbonacci(signature,n):
+    digit = -len(signature)
+    while len(signature) < n:
+        signature.append(sum(signature[digit:]))
+    return signature if n >= len(signature) else signature[:n]
+
+
diff --git a/[beta]Tribonacci Sequence.py b/[beta]Tribonacci Sequence.py
@@ -0,0 +1,5 @@
+def tribonacci(signature,n):
+    while len(signature) < n:
+        signature.append(sum(signature[-3:]))
+    return signature if n >= len(signature) else signature[:n]
+
