I've always wondered why there isn't a bin() built-in in Python.
Built-in functions already exist for converting ints to hexadecimal and
octal strings and vice versa i.e.
s = hex() and int(s, 16)
s = oct() and int(s, 8)
but no bin() function for binary strings
s = ??? and int(s, 2)?
Working with hardware I occasionally need to display an integer in
binary format, or manipulate the bits of integer. A simple example would
be reversing the order of the bits. Converting an int to binary string,
reversing the string, then converting back to an int is a simple way to
do this. Right now I use the recipe in
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/219300 and am
happy to continue to do so, but it has always struck me as odd that
there isn't a bin() built-in.
Mike
PS. I'll let someone else argue the case for the tri(), quad(),
penta()... built-in functions.
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