New in version 2.1.
Deprecated since release 2.3. Use
for line in file instead.
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
0, as required by for statement or the filter() function.
Thus, the code
import xreadlines, sys
for line in xreadlines.xreadlines(sys.stdin):
has approximately the same speed and memory consumption as
lines = sys.stdin.readlines(8*1024)
if not lines: break
for line in lines:
except the clarity of the for statement is retained in the former
- Return a new xreadlines object which will iterate over the contents of fileobj.
fileobj must have a readlines() method that supports
the sizehint parameter. Note: Because
the readlines() method buffers data, this effectively ignores the
effects of setting the file object as unbuffered.
An xreadlines object s supports the following sequence operation:
If successive values of i are not sequential starting from
code will raise RuntimeError.
After the last line of the file is read, this code will raise an IndexError.