Dear Tutors, I am new to python.
I am trying to understand (& use) the python implementation of goertzel implementation provided on http://www.black-aura.com/blog/2011/12/10/python-implementation-of-the-goertzel-algorithm-dtmf-decoding/ . This python program uses unpack_from() function to unpack string into array of ints, with the following statement: frames = struct.unpack_from(*"%dH" % nframes * **nchannels*, frames) I could know the use of unpack_from, but I could not understand the "fmt" part, i.e *"%dH" % nframes * nchannels*. Can you pls help me know, what is the purpose of two "%" signs in this statement? Thanks for your help in advance. Best Regards, banes
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