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BITS_TO_HEX= {
"0000": "0",
"0001": "1",
"0010": "2",
"0011": "3",
"0100": "4",
"0101": "5",
"0110": "6",
"0111": "7",
"1000": "8",
"1001": "9",
"1010": "a",
"1011": "b",
"1100": "c",
"1101": "d",
"1110": "e",
"1111": "f",
}
defbin_to_hexadecimal(binary_str: str) ->str:
"""
Converting a binary string into hexadecimal using Grouping Method
>>> bin_to_hexadecimal('101011111')
'0x15f'
>>> bin_to_hexadecimal(' 1010 ')
'0x0a'
>>> bin_to_hexadecimal('-11101')
'-0x1d'
>>> bin_to_hexadecimal('a')
Traceback (most recent call last):
...
ValueError: Non-binary value was passed to the function
>>> bin_to_hexadecimal('')
Traceback (most recent call last):
...
ValueError: Empty string was passed to the function
"""
# Sanitising parameter
binary_str=str(binary_str).strip()
# Exceptions
ifnotbinary_str:
raiseValueError("Empty string was passed to the function")
is_negative=binary_str[0] =="-"
binary_str=binary_str[1:] ifis_negativeelsebinary_str
ifnotall(charin"01"forcharinbinary_str):
raiseValueError("Non-binary value was passed to the function")
binary_str= (
"0"* (4* (divmod(len(binary_str), 4)[0] +1) -len(binary_str)) +binary_str
)
hexadecimal= []
forxinrange(0, len(binary_str), 4):
hexadecimal.append(BITS_TO_HEX[binary_str[x : x+4]])
hexadecimal_str="0x"+"".join(hexadecimal)
return"-"+hexadecimal_strifis_negativeelsehexadecimal_str
if__name__=="__main__":
fromdoctestimporttestmod
testmod()