algorithms-python/algorithms/maths/decimal_to_binary_ip.py at master · Mu-L/algorithms-python · GitHub

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"""

Given an ip address in dotted-decimal representation, determine the

binary representation. For example,

decimal_to_binary(255.0.0.5) returns 11111111.00000000.00000000.00000101

accepts string

returns string

"""

def decimal_to_binary_util(val):

"""

Convert 8-bit decimal number to binary representation

:type val: str

:rtype: str

"""

bits = [128, 64, 32, 16, 8, 4, 2, 1]

val = int(val)

binary_rep = ''

for bit in bits:

if val >= bit:

binary_rep += str(1)

val -= bit

else:

binary_rep += str(0)

return binary_rep

def decimal_to_binary_ip(ip):

"""

Convert dotted-decimal ip address to binary representation with help of decimal_to_binary_util

"""

values = ip.split('.')

binary_list = []

for val in values:

binary_list.append(decimal_to_binary_util(val))

return '.'.join(binary_list)

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