New in version 2.1.
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 beginning at 0
, as
required by for statement or the
filter() function.
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:
Operation | Result |
---|---|
s[i] |
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.
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