Hi, Hendrik van Rooyen wrote:
Is there a canonical way to address the bits in a structure like an array or string or struct?Or alternatively, is there a good way to combine eight ints that represent bits into one of the bytes in some array or string or whatever? It seems to me that there is a dilemma here : if you can write: bit3 = 1 Then you have to jump through hoops to get bit0 through bit7 into some byte that you can send to an i/o routine.On the other hand, if you keep the bits "in" the byte, then you can write:byte[3] = '\x7e'but you have to jump through hoops to get at the individual bits.Is there a "best" way? It would be nice to be able to write: if io.byte2.bit3: do_something() if io.byte2 == alarm_value: do_something_else() where: io.byte2 & 8 "is" io.byte2.bit3
byte1 byte2? this does not look very practical to me. In the simplest form of storing your values in a text string, you could just use ord() to get the byte value and operate on it with 1<<0 1<<1 1<<3 and so on. If you want, put a module in which defines the constants bit1=1<<0 bit2=1<<1 and so on and use it via if byte & bit1: ... more efficiently for operations on really big bit strings is probably just using integers. HTH Tino
Is this possible? - Hendrik -- http://mail.python.org/mailman/listinfo/python-list
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