python之read,readline,readlines区别

慧9建

qd_cpu_str=os.popen(r" ps -ef|grep QD|grep -v grep|grep -v cpu|awk '{print $10','$2','$14}'")　　
for line in qd_cpu_str.read():
　　print "line read is: %s" %line
　　
结果：
　　
/usr/bin/python2.6 /data/script/python/pycharm/pycharm_test1/cpu_QD.py
　　
line read is: 1
　　
line read is:
　　
line read is: 7
　　
line read is: 2
　　
line read is: 9
　　
line read is: 1
　　
line read is:
　　
line read is: Q
　　
line read is: W
　　
line read is: o
　　
line read is: r
　　
line read is: l
　　
line read is: d
　　
line read is:
　　
line read is: 1
　　
line read is:
　　
line read is: 7
　　
line read is: 2
　　
line read is: 9
　　
line read is: 7
　　
line read is:
　　
line read is: Q
　　
line read is: D
　　
line read is: B
　　
line read is: P
　　
line read is: r
　　
line read is: o
　　
line read is: x
　　
line read is: y
　　
line read is:
　　
line read is: 1
　　
line read is:
　　
line read is: 7
　　
line read is: 3
　　
line read is: 1
　　
line read is: 0
　　
line read is:
　　
line read is: Q
　　
line read is: G
　　
line read is: a
　　
line read is: m
　　
line read is: e
　　
line read is: S
　　
line read is: e
　　
line read is: r
　　
line read is: v
　　
line read is: e
　　
line read is: r
　　
line read is:
　　
line read is: 1
　　
line read is:
　　
line read is: 7
　　
line read is: 3
　　
line read is: 1
　　
line read is: 5
　　
line read is:
　　
line read is: Q
　　
line read is: G
　　
line read is: a
　　
line read is: t
　　
line read is: e
　　
line read is: w
　　
line read is: a
　　
line read is: y
　　
line read is:
　　
line read is: 1
　　
line read is:
　　
line read is: 7
　　
line read is: 3
　　
line read is: 2
　　
line read is: 5
　　
line read is:
　　
line read is: Q
　　
line read is: C
　　
line read is: o
　　
line read is: m
　　
line read is: m
　　
line read is: u
　　
line read is: n
　　
line read is: i
　　
line read is: t
　　
line read is: y
　　
line read is:
　　
line read is: 2
　　
line read is:
　　
line read is: 7
　　
line read is: 3
　　
line read is: 9
　　
line read is: 0
　　
line read is:
　　
line read is: Q
　　
line read is: W
　　
line read is: o
　　
line read is: r
　　
line read is: l
　　
line read is: d
　　
line read is:
　　
line read is: 2
　　
line read is:
　　
line read is: 7
　　
line read is: 3
　　
line read is: 9
　　
line read is: 7
　　
line read is:
　　
line read is: Q
　　
line read is: D
　　
line read is: B
　　
line read is: P
　　
line read is: r
　　
line read is: o
　　
line read is: x
　　
line read is: y
　　
line read is:
　　
line read is: 2
　　
line read is:
　　
line read is: 7
　　
line read is: 4
　　
line read is: 0
　　
line read is: 3
　　
line read is:
　　
line read is: Q
　　
line read is: G
　　
line read is: a
　　
line read is: m
　　
line read is: e
　　
line read is: S
　　
line read is: e
　　
line read is: r
　　
line read is: v
　　
line read is: e
　　
line read is: r
　　
line read is:
　　
line read is: 2
　　
line read is:
　　
line read is: 7
　　
line read is: 4
　　
line read is: 0
　　
line read is: 8
　　
line read is:
　　
line read is: Q
　　
line read is: G
　　
line read is: a
　　
line read is: t
　　
line read is: e
　　
line read is: w
　　
line read is: a
　　
line read is: y
　　
line read is:
　　
line read is: 2
　　
line read is:
　　
line read is: 7
　　
line read is: 4
　　
line read is: 1
　　
line read is: 2
　　
line read is:
　　
line read is: Q
　　
line read is: C
　　
line read is: o
　　
line read is: m
　　
line read is: m
　　
line read is: u
　　
line read is: n
　　
line read is: i
　　
line read is: t
　　
line read is: y
　　
line read is:
　　
line read is: 3
　　
line read is:
　　
line read is: 7
　　
line read is: 4
　　
line read is: 4
　　
line read is: 7
　　
line read is:
　　
line read is: Q
　　
line read is: W
　　
line read is: o
　　
line read is: r
　　
line read is: l
　　
line read is: d
　　
line read is:
　　
line read is: 3
　　
line read is:
　　
line read is: 7
　　
line read is: 4
　　
line read is: 5
　　
line read is: 4
　　
line read is:
　　
line read is: Q
　　
line read is: D
　　
line read is: B
　　
line read is: P
　　
line read is: r
　　
line read is: o
　　
line read is: x
　　
line read is: y
　　
line read is:
　　
line read is: 3
　　
line read is:
　　
line read is: 7
　　
line read is: 4
　　
line read is: 7
　　
line read is: 5
　　
line read is:
　　
line read is: Q
　　
line read is: G
　　
line read is: a
　　
line read is: m
　　
line read is: e
　　
line read is: S
　　
line read is: e
　　
line read is: r
　　
line read is: v
　　
line read is: e
　　
line read is: r
　　
line read is:
　　
line read is: 3
　　
line read is:
　　
line read is: 7
　　
line read is: 4
　　
line read is: 8
　　
line read is: 2
　　
line read is:
　　
line read is: Q
　　
line read is: G
　　
line read is: a
　　
line read is: t
　　
line read is: e
　　
line read is: w
　　
line read is: a
　　
line read is: y
　　
line read is:
　　
line read is: 3
　　
line read is:
　　
line read is: 7
　　
line read is: 4
　　
line read is: 8
　　
line read is: 6
　　
line read is:
　　
line read is: Q
　　
line read is: C
　　
line read is: o
　　
line read is: m
　　
line read is: m
　　
line read is: u
　　
line read is: n
　　
line read is: i
　　
line read is: t
　　
line read is: y
　　
line read is:
　　
Process finished with exit code 0