Added from (up to hexal) to decimal converter

NumeralSystemConverter/NumeralSystemConverter.py

@@ -0,0 +1,48 @@
+print("©KOTIKOT, script by BarsTiger")
+print()
+print("Please, type only int numbers, str is allowed only in hex")
+
+hextonum = {
+    "0": 0,
+    "1": 1,
+    "2": 2,
+    "3": 3,
+    "4": 4,
+    "5": 5,
+    "6": 6,
+    "7": 7,
+    "8": 8,
+    "9": 9,
+    "A": 10,
+    "B": 11,
+    "C": 12,
+    "D": 13,
+    "E": 14,
+    "F": 15
+}
+
+
+
+systypefrom = int(input("Type base number of system convert FROM: "))
+systypeto = int(input("Type base number of system convert TO: "))
+convertfrom = input("Type number, that you want to convert: ")
+if systypefrom > 16 or systypeto > 16:
+    print("Sorry, more than hexal systems aren't supported RIGHT NOW. Come back in several centuries")
+    input()
+    exit()
+
+convertfrom = convertfrom.upper()
+
+def todecimal(number, base):
+    n = len(str(number))
+    i = 0
+    res = 0
+    while n - i != 0:
+        i += 1
+        res += int(int(hextonum[str(number)[i - 1]]) * (base ** (n - i)))
+
+    return res
+
+print(todecimal(convertfrom, systypefrom))
+
+input()