Add ReverseComplement function

Code/ReverseComplement.py

@@ -0,0 +1,17 @@
+def ReverseComplement(Pattern):
+    Pattern = Reverse(Pattern)
+    Pattern = Complement(Pattern)
+    return Pattern
+
+
+def Reverse(Pattern):
+    reversed = Pattern[::-1]
+    return reversed
+
+
+def Complement(Pattern):
+    compl = ""
+    complement_letters = {"A": "T", "T": "A", "C": "G", "G": "C"}
+    for char in Pattern:
+        compl += complement_letters[char]
+    return compl