Added function to convert from decimal to another base

conversions/decimal_to_any.py

@@ -0,0 +1,82 @@
+"""Convert a positive Decimal Number to Any Other Representation"""
+
+
+def decimal_to_any(num: int, base: int) -> str:
+
+    """
+        Convert a Integer Decimal Number to a Binary Number as str.
+        >>> decimal_to_any(0, 2)
+        '0'
+        >>> decimal_to_any(5, 4)
+        '11'
+        >>> decimal_to_any(20, 3)
+        '202'
+        >>> decimal_to_any(58, 16)
+        '3A'
+        >>> # negatives will error
+        >>> decimal_to_any(-45, 8)  # doctest: +ELLIPSIS
+        Traceback (most recent call last):
+        ...
+        ValueError: parameter must be positive int
+        >>> # floats will error
+        >>> decimal_to_any(34.4, 6) # doctest: +ELLIPSIS
+        Traceback (most recent call last):
+        ...
+        TypeError: 'float' object cannot be interpreted as an integer
+        >>> #a float base will error
+        >>> decimal_to_any(5, 2.5) # doctest: +ELLIPSIS
+        Traceback (most recent call last):
+        ...
+        TypeError: 'float' object cannot be interpreted as an integer
+        >>> # a str base will error
+        >>> decimal_to_any(10, '16') # doctest: +ELLIPSIS
+        Traceback (most recent call last):
+        ...
+        TypeError: 'str' object cannot be interpreted as an integer
+    """
+    if isinstance(num, float):
+        raise TypeError("'float' object cannot be interpreted as an integer")
+    if num < 0:
+        raise ValueError("parameter must be positive int")
+    if type(base) == str:
+        raise TypeError("'str' object cannot be interpreted as an integer")
+    if type(base) == float:
+        raise TypeError("'float' object cannot be interpreted as an integer")
+
+    HEXADECIMAL = {'10': 'A', '11': 'B', '12': 'C', '13': 'D', '14': 'E', '15': 'F'}
+    new_value = ""
+    mod = 0
+    div = 0
+    if base in (0, 1):
+        return
+    while div not in (0, 1):
+        div, mod = divmod(num, base)
+        if base == 16 and 9 < mod < 16:
+            actual_value = HEXADECIMAL[str(mod)]
+            mod = actual_value
+        new_value += str(mod)
+        div = num // base
+        num = div
+        if div == 0:
+            if base != 16:
+                return str(new_value[::-1])
+            else:
+                if new_value[::-1] in HEXADECIMAL:
+                    return HEXADECIMAL[new_value[::-1]]
+                return new_value[::-1]
+        elif div == 1:
+            new_value += str(div)
+            if base != 16:
+                return str(new_value[::-1])
+            else:
+                if new_value[::-1] in HEXADECIMAL:
+                    return HEXADECIMAL[new_value[::-1]]
+                return new_value[::-1]
+
+    return new_value[::-1]
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()