Does array.read() move file pointer automatically?
google at mrabarnett.plus.com
Wed Feb 4 20:10:49 EST 2009
> On Feb 4, 3:10 pm, MRAB <goo... at 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
>> > ()" 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
> import pdb
> import array
> from numpy import *
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!
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