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 -- http://mail.python.org/mailman/listinfo/python-list
