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80 lines
2.4 KiB
Python
80 lines
2.4 KiB
Python
def oct_to_decimal(oct_string: str) -> int:
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"""
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Convert a octal value to its decimal equivalent
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>>> oct_to_decimal("")
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Traceback (most recent call last):
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...
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ValueError: Empty string was passed to the function
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>>> oct_to_decimal("-")
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Traceback (most recent call last):
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...
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ValueError: Non-octal value was passed to the function
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>>> oct_to_decimal("e")
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Traceback (most recent call last):
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...
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ValueError: Non-octal value was passed to the function
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>>> oct_to_decimal("8")
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Traceback (most recent call last):
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...
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ValueError: Non-octal value was passed to the function
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>>> oct_to_decimal("-e")
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Traceback (most recent call last):
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...
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ValueError: Non-octal value was passed to the function
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>>> oct_to_decimal("-8")
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Traceback (most recent call last):
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...
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ValueError: Non-octal value was passed to the function
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>>> oct_to_decimal("1")
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1
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>>> oct_to_decimal("-1")
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-1
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>>> oct_to_decimal("12")
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10
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>>> oct_to_decimal(" 12 ")
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10
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>>> oct_to_decimal("-45")
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-37
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>>> oct_to_decimal("-")
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Traceback (most recent call last):
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...
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ValueError: Non-octal value was passed to the function
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>>> oct_to_decimal("0")
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0
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>>> oct_to_decimal("-4055")
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-2093
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>>> oct_to_decimal("2-0Fm")
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Traceback (most recent call last):
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...
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ValueError: Non-octal value was passed to the function
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>>> oct_to_decimal("")
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Traceback (most recent call last):
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...
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ValueError: Empty string was passed to the function
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>>> oct_to_decimal("19")
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Traceback (most recent call last):
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...
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ValueError: Non-octal value was passed to the function
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"""
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oct_string = str(oct_string).strip()
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if not oct_string:
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raise ValueError("Empty string was passed to the function")
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is_negative = oct_string[0] == "-"
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if is_negative:
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oct_string = oct_string[1:]
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if not oct_string.isdigit() or not all(0 <= int(char) <= 7 for char in oct_string):
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raise ValueError("Non-octal value was passed to the function")
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decimal_number = 0
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for char in oct_string:
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decimal_number = 8 * decimal_number + int(char)
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if is_negative:
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decimal_number = -decimal_number
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return decimal_number
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if __name__ == "__main__":
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from doctest import testmod
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testmod()
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