On Feb 4, 5:10 pm, MRAB <goo...@mrabarnett.plus.com> wrote: > Lionel wrote: > > > On Feb 4, 3:10 pm, MRAB <goo...@mrabarnett.plus.com> wrote: >> Lionel > wrote: > > >> > >> > Hello everyone. Quick question: When using the "read()" method in the > >> > array module, must I redirect the current file pointer or will that > >> > occur automatically? > >> > > >> > For example, if I were to sequentially read data in chunks from a > >> > binary file as in: > >> > > >> > > >> > for currentChunk in range(numberOfChunksToRead): > >> > > >> > floatData = array.array('f') > >> > floatData.read(MyFileHandle, numberOfFloatsPerChunk) > >> > ...go to work on data... > >> > > >> > > >> > at each iteration of the "for" loop, will the next chunk of bytes be > >> > read into "floatData" or must I move the file pointer by calling > "seek > >> > ()" or some function like that? > >> > > >> The read() method has been deprecated since version Python 1.5.1. Use > >> the fromfile() method instead. > >> > >> It will advance the file pointer. > > > > Thank you, I'll change it. On a related matter, I seem to be making a > > mistake somewhere in the way I'm importing and using modules (in > > particular the "array" module). > > > > The following code generates an error (traceback message follows > > code): > > > > import pdb > > import array > > from numpy import * > > > [snip] > I think that numpy has a class called "array", so the "import *" will > result in the name "array" binding to that, thus hiding the module > called "array" that you've only just imported!
I believe that's correct. I've gotten it to work by changing the import statements to: import pdb import array import numpy and then I qualify the module specific attributes as either "numpy.SomeAttribute" or "array.SomeAttribute" to avoid this namespace ambiguity. Thanks for the input! L -- http://mail.python.org/mailman/listinfo/python-list