How to Convert Between ASCII and Binary Representations in Python?

Converting Binary to ASCII and Back

The given code snippet converts a string into binary representation. To comprehend its mechanism, let's analyze an alternative approach.

Python 2: ASCII Character Range

For ASCII characters within the range [ -~], Python 2 provides a simpler solution:

import binascii

n = int(binascii.hexlify('hello'), 16)
binary_representation = bin(n)

This code converts the string 'hello' into a hexadecimal representation and then into a binary representation.

Reversing the Conversion

To convert the binary representation back to a string:

n = int('0b110100001100101011011000110110001101111', 2)
string_representation = binascii.unhexlify('%x' % n)

This converts the binary representation back into a hexadecimal representation and then into the original string 'hello.'

Python 3.2 :

Python 3.2 introduced additional methods:

n = int.from_bytes('hello'.encode(), 'big')
binary_representation = bin(n)

n = int('0b110100001100101011011000110110001101111', 2)
string_representation = n.to_bytes((n.bit_length() + 7) // 8, 'big').decode()

Unicode Support in Python 3:

To support all Unicode characters in Python 3:

def text_to_bits(text, encoding='utf-8', errors='surrogatepass'):
    # ...

def text_from_bits(bits, encoding='utf-8', errors='surrogatepass'):
    # ...

This function converts between text and binary representations, supporting Unicode characters.

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