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749727
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2009-04-14T23:34:27.780
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<p>Expanding on Brian's answer:</p> <pre><code># Get rid of the '----' line for simplicity data_file = '''id binary-coded-info 4657 001001101 4789 110111111 ''' import cStringIO import csv, sys data = [] # A list for the row dictionaries (we could just as easily have used the regular reader method) # Read in the file using the csv module # Each row will be a dictionary with keys corresponding to the first row reader = csv.DictReader(cStringIO.StringIO(data_file), delimiter=' ', skipinitialspace = True) try: for row in reader: data.append(row) # Add the row dictionary to the data list except csv.Error, e: sys.exit('file %s, line %d: %s' % (filename, reader.line_num, e)) # Do something with the bits first = int(data[0]['binary-coded-info'],2) # First bit string assert(first & int('00001101',2) == int('1101',2)) # Bitwise AND assert(first | int('00001101',2) == int('1001101',2)) # Bitwise OR assert(first ^ int('00001101',2) == int('1000000',2)) # Bitwise XOR assert(~first == int('110110010',2)) # Binary Ones Complement assert(first << 2 == int('100110100',2)) # Binary Left Shift assert(first >> 2 == int('000010011',2)) # Binary Right Shift </code></pre> <p>See the python docs on <a href="http://docs.python.org/reference/expressions.html#binary-arithmetic-operations" rel="nofollow noreferrer">expressions</a> for more information and <a href="http://docs.python.org/library/csv.html#module-csv" rel="nofollow noreferrer">csv module</a> for more information on the csv module.</p>
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1. POHow to read and process binary (base-2) logical representations from file
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1. PTAnswer
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1. USuser90855
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