Steve Haley wrote: > I am running Python 2.1 which ships with ArcView 9.1. I am going > through the 2.1 tutorial and came across readlines(). > > The tutorial seems to be telling me that ‘f.readlines(2) should read out > 2 bytes plus what is needed to complete the current line. Instead, it > is reading out the entire file no matter what I enter as a parameter. I > know I am going to feel really dumb when I hear the explanation but > please remember I’m new to this.
As the documentation says, the parameter to readlines() is a hint which may be rounded up to an internal buffer size. Python 2.4 seems to use a buffer size of 8192 so using sizehint < 8192 may have no effect. If you want to read a single line of the file, use readline() instead. To iterate through all the lines of a file one at a time use for line in f.xreadlines(): # process line HTH. Come back if you have more questions! Kent _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
