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d6bff5c133
* * Renamed files
* Fiexed doctest
* fixup! Format Python code with psf/black push
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
def bin_to_decimal(bin_string: str) -> int:
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"""
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Convert a binary value to its decimal equivalent
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>>> bin_to_decimal("101")
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5
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>>> bin_to_decimal(" 1010 ")
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10
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>>> bin_to_decimal("-11101")
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-29
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>>> bin_to_decimal("0")
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0
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>>> bin_to_decimal("a")
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Traceback (most recent call last):
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...
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ValueError: Non-binary value was passed to the function
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>>> bin_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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>>> bin_to_decimal("39")
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Traceback (most recent call last):
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...
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ValueError: Non-binary value was passed to the function
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"""
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bin_string = str(bin_string).strip()
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if not bin_string:
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raise ValueError("Empty string was passed to the function")
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is_negative = bin_string[0] == "-"
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if is_negative:
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bin_string = bin_string[1:]
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if not all(char in "01" for char in bin_string):
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raise ValueError("Non-binary value was passed to the function")
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decimal_number = 0
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for char in bin_string:
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decimal_number = 2 * decimal_number + int(char)
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return -decimal_number if is_negative else 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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