New in version 2.1.
This module defines a new object type which can efficiently iterate
over the lines of a file. An xreadlines object is a sequence type
which implements simple in-order indexing beginning at
required by for statement or the
Thus, the code
import xreadlines, sys for line in xreadlines.xreadlines(sys.stdin): pass
has approximately the same speed and memory consumption as
while 1: lines = sys.stdin.readlines(8*1024) if not lines: break for line in lines: pass
except the clarity of the for statement is retained in the former case.
An xreadlines object s supports the following sequence operation:
||i'th line of s|
If successive values of i are not sequential starting from
0, this code will raise RuntimeError.
After the last line of the file is read, this code will raise an IndexError.See About this document... for information on suggesting changes.