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copied!<p>For ASCII characters in the range <code>[ -~]</code> on Python 2:</p> <pre><code>>>> import binascii >>> bin(int(binascii.hexlify('hello'), 16)) '0b110100001100101011011000110110001101111' </code></pre> <p>In reverse:</p> <pre><code>>>> n = int('0b110100001100101011011000110110001101111', 2) >>> binascii.unhexlify('%x' % n) 'hello' </code></pre> <hr> <p>In Python 3.2+:</p> <pre><code>>>> bin(int.from_bytes('hello'.encode(), 'big')) '0b110100001100101011011000110110001101111' </code></pre> <p>In reverse:</p> <pre><code>>>> n = int('0b110100001100101011011000110110001101111', 2) >>> n.to_bytes((n.bit_length() + 7) // 8, 'big').decode() 'hello' </code></pre> <hr> <h3>To support all Unicode characters in Python 3:</h3> <pre><code>def text_to_bits(text, encoding='utf-8', errors='surrogatepass'): bits = bin(int.from_bytes(text.encode(encoding, errors), 'big'))[2:] return bits.zfill(8 * ((len(bits) + 7) // 8)) def text_from_bits(bits, encoding='utf-8', errors='surrogatepass'): n = int(bits, 2) return n.to_bytes((n.bit_length() + 7) // 8, 'big').decode(encoding, errors) or '\0' </code></pre> <h3>Here's single-source Python 2/3 compatible version:</h3> <pre><code>import binascii def text_to_bits(text, encoding='utf-8', errors='surrogatepass'): bits = bin(int(binascii.hexlify(text.encode(encoding, errors)), 16))[2:] return bits.zfill(8 * ((len(bits) + 7) // 8)) def text_from_bits(bits, encoding='utf-8', errors='surrogatepass'): n = int(bits, 2) return int2bytes(n).decode(encoding, errors) def int2bytes(i): hex_string = '%x' % i n = len(hex_string) return binascii.unhexlify(hex_string.zfill(n + (n & 1))) </code></pre> <h3>Example</h3> <pre><code>>>> text_to_bits('hello') '0110100001100101011011000110110001101111' >>> text_from_bits('110100001100101011011000110110001101111') == u'hello' True </code></pre>

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