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master
conversions/hex_to_bin.py
56 строк
1 KB
Caeden Perelli-Harris
refactor: Indent ... for visual purposes (#7744)
27 окт 2022, 20:42
Не верифицирован
27 окт 2022, 20:42
9bba42e
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def hex_to_bin(hex_num: str) -> int: """ Convert a hexadecimal value to its binary equivalent #https://stackoverflow.com/questions/1425493/convert-hex-to-binary Here, we have used the bitwise right shift operator: >> Shifts the bits of the number to the right and fills 0 on voids left as a result. Similar effect as of dividing the number with some power of two. Example: a = 10 a >> 1 = 5 >>> hex_to_bin("AC") 10101100 >>> hex_to_bin("9A4") 100110100100 >>> hex_to_bin(" 12f ") 100101111 >>> hex_to_bin("FfFf") 1111111111111111 >>> hex_to_bin("-fFfF") -1111111111111111 >>> hex_to_bin("F-f") Traceback (most recent call last): ... ValueError: Invalid value was passed to the function >>> hex_to_bin("") Traceback (most recent call last): ... ValueError: No value was passed to the function """ hex_num = hex_num.strip() if not hex_num: raise ValueError("No value was passed to the function") is_negative = hex_num[0] == "-" if is_negative: hex_num = hex_num[1:] try: int_num = int(hex_num, 16) except ValueError: raise ValueError("Invalid value was passed to the function") bin_str = "" while int_num > 0: bin_str = str(int_num % 2) + bin_str int_num >>= 1 return int(("-" + bin_str) if is_negative else bin_str) if __name__ == "__main__": import doctest doctest.testmod()