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    <p>For some reason I'm having a heck of a time figuring out how to do this in Python. I am trying to represent a binary string in a string variable, and all I want it to have is</p> <pre><code>0010111010 </code></pre> <p>However, no matter how I try to format it as a string, Python always chops off the leading zeroes, which is giving me a headache in trying to parse it out.</p> <p>I'd hoped <a href="https://stackoverflow.com/questions/733454/best-way-to-format-integer-as-string-with-leading-zeros">this question</a> would have helped, but it doesn't really...</p> <p>Is there a way to force Python to stop auto-converting my string to an integer?</p> <p>I have tried the following:</p> <pre><code>val = "" if (random.random() &gt; 0.50): val = val + "1" else val = val + "0" </code></pre> <p>and</p> <pre><code>val = "" if (random.random() &gt; 0.50): val = val + "%d" % (1) else: val = val + "%d" % (0) </code></pre> <p>I had stuck it into an array previously, but ran into issues inserting that array into another array, so I figured it would just be easier to parse it as a string. </p> <p>Any thoughts on how to get my leading zeroes back? The string is supposed to be a fixed length of 10 bits if that helps.</p> <hr> <p>Edit:</p> <p>The code:</p> <pre><code> def create_string(x): for i in xrange(10): # 10 random populations for j in xrange(int(x)): # population size v = ''.join(choice(('0','1')) for _ in range(10)) arr[i][j] = v return arr a = create_string(5) print a </code></pre> <p>Hopefully the output I'm seeing will show you why I'm having issues:</p> <pre><code>[[ 10000100 1100000001 101010110 111011 11010111] [1001111000 1011011100 1110110111 111011001 10101000] [ 110010001 1011010111 1100111000 1011100011 1000100001] [ 10011010 1000011001 1111111010 11100110 110010101] [1101010000 1010110101 110011000 1100001001 1010100011] [ 10001010 1100000001 1110010000 10110000 11011010] [ 111011 1000111010 1100101 1101110001 110110000] [ 110100100 1100000000 1010101001 11010000 1000011011] [1110101110 1100010101 1110001110 10011111 101101100] [ 11100010 1111001010 100011101 1101010 1110001011]] </code></pre> <p>The issue here isn't only with printing, I also need to be able to manipulate them on a per-element basis. So if I go to play with the first element, then it returns a 1, not a 0 (on the first element).</p>
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    1. COPython will never auto-convert a string into an integer. Also why do you need useless leading zeroes?
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    2. COUm, both of the code examples you've posted should work. What are you doing with the string *after* you create it? How are you outputting it/displaying it?
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    3. CO@Amber: They are going into an array (arr), and I'm simply calling 'print arr'
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