On Mar 30, 9:23 am, "Diez B. Roggisch" <[EMAIL PROTECTED]> wrote: > hdante schrieb: > > > > > On Mar 30, 4:31 am, John Machin <[EMAIL PROTECTED]> wrote: > >> On Mar 30, 3:58 pm, hdante <[EMAIL PROTECTED]> wrote: > > >>> On Mar 29, 3:44 pm, "[EMAIL PROTECTED]" > >>> <[EMAIL PROTECTED]> wrote: > >>>> Hello, > >>>> I am having trouble writing the code to read a binary string. I would > >>>> like to extract the values for use in a calculation. > >>>> Any help would be great. > >>> I'm too lazy to debug your binary string, but I suggest that you > >>> completely throw away the binary file and restart with a database or > >>> structured text. See, for example: > >>> http://pyyaml.org/wiki/PyYAML > >>> If you have some legacy binary file that you need to process, try > >>> creating a C program that freads the binary file and printfs a text > >>> equivalent. > >> ... and that couldn't be done faster and better in Python?? > > > No. A C struct is done faster and better than python (thus, the > > correctness check is faster in C). Also, chances are high that there's > > already an include file with the binary structure. > > That is utter nonsense. There is no "correctness check" in C. and using > printf & thus creating strings that you then need to parse in python > just doubles the effort needlessly. > > The standard-lib module "struct" is exactly what you need, nothing else. > it sure is faster than any parsing of preprocessed data, doesn't > introduce a language-mixture and is prototyped/tested much faster > because of it being python - and not C-compiler and C-debugger. > > Alternatively, *IF* there were C-structure-declarations available for > the binary format, the usage of ctypes would allow for roughly the same, > even reducing the effort to create the structure definition a great deal. > > Diez
Whatever you say. -- http://mail.python.org/mailman/listinfo/python-list
