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57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
def hex_to_bin(hex_num: str) -> int:
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"""
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Convert a hexadecimal value to its binary equivalent
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#https://stackoverflow.com/questions/1425493/convert-hex-to-binary
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Here, we have used the bitwise right shift operator: >>
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Shifts the bits of the number to the right and fills 0 on voids left as a result.
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Similar effect as of dividing the number with some power of two.
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Example:
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a = 10
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a >> 1 = 5
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>>> hex_to_bin("AC")
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10101100
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>>> hex_to_bin("9A4")
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100110100100
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>>> hex_to_bin(" 12f ")
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100101111
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>>> hex_to_bin("FfFf")
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1111111111111111
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>>> hex_to_bin("-fFfF")
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-1111111111111111
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>>> hex_to_bin("F-f")
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Traceback (most recent call last):
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...
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ValueError: Invalid value was passed to the function
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>>> hex_to_bin("")
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Traceback (most recent call last):
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...
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ValueError: No value was passed to the function
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"""
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hex_num = hex_num.strip()
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if not hex_num:
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raise ValueError("No value was passed to the function")
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is_negative = hex_num[0] == "-"
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if is_negative:
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hex_num = hex_num[1:]
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try:
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int_num = int(hex_num, 16)
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except ValueError:
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raise ValueError("Invalid value was passed to the function")
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bin_str = ""
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while int_num > 0:
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bin_str = str(int_num % 2) + bin_str
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int_num >>= 1
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return int(("-" + bin_str) if is_negative else bin_str)
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if __name__ == "__main__":
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import doctest
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doctest.testmod()
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