Update octal_to_binary.py

Made the code more efficient

conversions/octal_to_binary.py

@@ -1,91 +1,74 @@
-def octal_to_binary(octal: str) -> str:
-    """
-    Convert an octal value to its binary equivalent
-    >>> octal_to_binary("")
-    Traceback (most recent call last):
-        ...
-    ValueError: Empty string was passed to the function
-    >>> octal_to_binary("-")
-    Traceback (most recent call last):
-        ...
-    ValueError: Non-octal value was passed to the function
-    >>> octal_to_binary("e")
-    Traceback (most recent call last):
-        ...
-    ValueError: Non-octal value was passed to the function
-    >>> octal_to_binary(8)
-    Traceback (most recent call last):
-        ...
-    ValueError: Non-octal value was passed to the function
-    >>> octal_to_binary("-e")
-    Traceback (most recent call last):
-        ...
-    ValueError: Non-octal value was passed to the function
-    >>> octal_to_binary("-8")
-    Traceback (most recent call last):
-        ...
-    ValueError: Non-octal value was passed to the function
-    >>> octal_to_binary("1")
-    '0b1'
-    >>> octal_to_binary("-1")
-    '-0b1'
-    >>> octal_to_binary("12")
-    '0b1010'
-    >>> octal_to_binary(" 12   ")
-    '0b1010'
-    >>> octal_to_binary("-45")
-    '-0b100101'
-    >>> octal_to_binary("-")
-    Traceback (most recent call last):
-        ...
-    ValueError: Non-octal value was passed to the function
-    >>> octal_to_binary("0")
-    '0b0'
-    >>> octal_to_binary("-4055")
-    '-0b100000101101'
-    >>> octal_to_binary("2-0Fm")
-    Traceback (most recent call last):
-        ...
-    ValueError: Non-octal value was passed to the function
-    >>> octal_to_binary("")
-    Traceback (most recent call last):
-        ...
-    ValueError: Empty string was passed to the function
-    >>> octal_to_binary("19")
-    Traceback (most recent call last):
-        ...
-    ValueError: Non-octal value was passed to the function
+def octal_to_binary(octal:str) -> str:
     """
+   Convert an octal value to its binary equivalent
+   >>> octal_to_binary("")
+   Traceback (most recent call last):
+       ...
+   ValueError: Empty string was passed to the function
+   >>> octal_to_binary("-")
+   Traceback (most recent call last):
+       ...
+   ValueError: Non-octal value was passed to the function
+   >>> octal_to_binary("e")
+   Traceback (most recent call last):
+       ...
+   ValueError: Non-octal value was passed to the function
+   >>> octal_to_binary(8)
+   Traceback (most recent call last):
+       ...
+   ValueError: Non-octal value was passed to the function
+   >>> octal_to_binary("-e")
+   Traceback (most recent call last):
+       ...
+   ValueError: Non-octal value was passed to the function
+   >>> octal_to_binary("-8")
+   Traceback (most recent call last):
+       ...
+   ValueError: Non-octal value was passed to the function
+   >>> octal_to_binary("1")
+   '0b1'
+   >>> octal_to_binary("-1")
+   '-0b1'
+   >>> octal_to_binary("12")
+   '0b1010'
+   >>> octal_to_binary(" 12   ")
+   '0b1010'
+   >>> octal_to_binary("-45")
+   '-0b100101'
+   >>> octal_to_binary("-")
+   Traceback (most recent call last):
+       ...
+   ValueError: Non-octal value was passed to the function
+   >>> octal_to_binary("0")
+   '0b0'
+   >>> octal_to_binary("-4055")
+   '-0b100000101101'
+   >>> octal_to_binary("2-0Fm")
+   Traceback (most recent call last):
+       ...
+   ValueError: Non-octal value was passed to the function
+   >>> octal_to_binary("")
+   Traceback (most recent call last):
+       ...
+   ValueError: Empty string was passed to the function
+   >>> octal_to_binary("19")
+   Traceback (most recent call last):
+       ...
+   ValueError: Non-octal value was passed to the function
+   """
     oct_string = str(octal).strip()
     if not oct_string:
         raise ValueError("Empty string was passed to the function")
-    is_negative = oct_string[0] == "-"
+    is_negative = oct_string.startswith('-')
     if is_negative:
         oct_string = oct_string[1:]
+        binary_num = '-0b'
+    else:
+        binary_num = '0b'
     if not oct_string.isdigit() or not all(0 <= int(char) <= 7 for char in oct_string):
         raise ValueError("Non-octal value was passed to the function")
-    decimal_number = 0
-    for char in oct_string:
-        decimal_number = 8 * decimal_number + int(char)
-    if is_negative:
-        decimal_number = -decimal_number
-    # Converting Decimal to Binary
-    if decimal_number == 0:
-        return "0b0"
-    negative = False
-    if decimal_number < 0:
-        negative = True
-        decimal_number = -decimal_number
-    binary: list[int] = []
-    while decimal_number > 0:
-        binary.insert(0, decimal_number % 2)
-        decimal_number >>= 1
-    if negative:
-        return "-0b" + "".join(str(e) for e in binary)
-    return "0b" + "".join(str(e) for e in binary)
-
-
+    binary_num += str(bin(int(oct_string, 8)))[2:]
+    return binary_num
 if __name__ == "__main__":
     from doctest import testmod
-
     testmod()