solution/m1-011

projects/011-arbitrary-base-conversions/python/main.py

@@ -0,0 +1,88 @@
+def arbitrary_to_base_10(string: str, base: int) -> int:
+    number_base_10=0
+    exponent=0
+    for character in string[::-1]:
+        if character.isdecimal(): 
+            partial_sum=int(character)*base**exponent
+            number_base_10+=partial_sum
+            exponent+=1
+        elif ord(character)>=65 and ord(character)<=70:
+            integer=(ord(character)-65)+10
+            partial_sum=integer*base**exponent
+            number_base_10+=partial_sum
+            exponent+=1
+        else:
+            integer=(ord(character)-97)+10
+            partial_sum=integer*base**exponent
+            number_base_10+=partial_sum
+            exponent+=1
+    return number_base_10
+
+def base_10_to_arbitrary_base(number_base_10: int, base: int) -> str:
+    quotient=number_base_10
+    number_string=""
+    while quotient!=0:
+        remainder=quotient%base
+        quotient//=base
+        if remainder>9:
+            remainder=chr((remainder-10)+65)
+        number_string+=str(remainder)
+    return number_string[::-1]
+
+
+while True:
+    try:
+        start_base=int(input("Enter a start base (between 2 and 16): "))
+        break
+    except ValueError:
+        print("Invalid input!")
+
+while True:
+    try:
+        destination_base=int(input("Enter a destination base (between 2 and 16): "))
+        break
+    except ValueError:
+        print("Invalid input!")
+
+if (start_base>=2 and start_base<=16) and (destination_base>=2 and destination_base<=16): 
+
+    number_string=input("Enter a number: ")
+    if start_base<=10:
+        is_valid_input=False
+        while not(is_valid_input):
+            for character in number_string:
+                if character.isdecimal() and int(character)<start_base:
+                    is_in_range=True
+                else:
+                    is_in_range=False
+                    break
+            if is_in_range==True:
+                is_valid_input=True
+            else:           
+                number_string=input("Invalid input! Enter a new number: ")
+    else:
+        is_valid_input=False
+        while not(is_valid_input):
+            for character in number_string:
+                if character.isdecimal():
+                    is_in_range=True
+                elif (ord(character)>=65 and ord(character)<=70) and (ord(character)-65)+10<start_base:
+                    is_in_range=True
+                elif (ord(character)>=97 and ord(character)<=102) and (ord(character)-97)+10<start_base:
+                    is_in_range=True
+                else:
+                    is_in_range=False
+                    break
+            if is_in_range==True:
+                is_valid_input=True
+            else:
+                number_string=input("Invalid input! Enter a new number: ")         
+
+    number_base_10=arbitrary_to_base_10(number_string, start_base)
+
+    result_number=base_10_to_arbitrary_base(number_base_10,destination_base)
+
+    print(f"{number_string} (base {start_base}) = {result_number} (base {destination_base})")
+
+else:
+    print("You chose a base outside of expected range!")