Michael Castleton a écrit : > > > Bruno Desthuilliers wrote: >> Michael Castleton a écrit : >>> When I open a csv or txt file with: >>> >>> infile = open(sys.argv[1],'rb').readlines() >>> or >>> infile = open(sys.argv[1],'rb').read() >>> >>> and then look at the first few lines of the file there is a carriage >>> return >>> + >>> line feed at the end of each line - \r\n >> Is there any reason you open your text files in binary mode ? >> (snip)
> Bruno, > No particular reason in this case. It was probably as a holdover from using > the csv module in the past. I'm wondering though if using binary on very > large > files (>100Mb) would save any processing time - no conversion to system > newline? > What do you think? I think that premature optimization is the root of all evil. You'll have to do the processing by yourself then, and I doubt it'll be as fast as the C-coded builtin newline processing. Anyway, you can easily check it out by yourself - Python has timeit (for micro-benchmarks) and a profiler. -- http://mail.python.org/mailman/listinfo/python-list
