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23 lines
519 B
Python
23 lines
519 B
Python
def octal_to_binary(octal_number: str) -> str:
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binary_number = ""
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octal_digits = "01234567"
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for digit in octal_number:
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if digit not in octal_digits:
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raise ValueError("Invalid octal digit")
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binary_digit = ""
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value = int(digit)
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for _ in range(3):
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binary_digit = str(value % 2) + binary_digit
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value //= 2
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binary_number += binary_digit
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return binary_number
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if __name__ == "__main__":
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import doctest
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doctest.testmod()
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