Read output line by line in python

Question

hi i want to make ssh connection and parse some datas. Im using paramiko and here is part of my code:

ssh=ssh_pre.invoke_shell()
ssh.send("display ospf peer brief \n")
output = ssh.recv(10000)

everything work until this part

buf=StringIO.StringIO(output)
for lines in buf.read()
    print lines

this code print chars line by line . I want to print lines . what should i do?

my main purpose i will read what is return from the server and find specific line. for example the line includes 'apple'. if i write line by line i believe i can do what i want — zeto
– zeto, Commented Dec 7, 2014 at 18:56

David Reeve · Accepted Answer · 2014-12-07 19:06:58Z

2

The issue is StringIO.read() returns a string, a sequence of characters, not lines. Try doing this:

buf=StringIO.StringIO(output)
for lines in buf.read().split("\n"):
    print lines

This will split your buffer by newlines and create a list of each line, rather than looping over each individual character in the string.

answered Dec 7, 2014 at 19:06

David Reeve

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