Python how to read output from pexpect child?
110,966
Solution 1
In pexpect the before
and after
attributes are populated after an expect
method. The most common thing used in this situation is waiting for the prompt (so you'll know that the previous command finished execution). So, in your case, the code might look something like this:
child = pexpect.spawn ('/bin/bash')
child.expect("Your bash prompt here")
child.sendline('ls')
#If you are using pxssh you can use this
#child.prompt()
child.expect("Your bash prompt here")
print(child.before)
Solution 2
Try the following:
import pexpect
child = pexpect.spawn('ls')
print child.read() # not readline
The read()
will give you the entire output of the ls.
Solution 3
#!/usr/bin/env python
import pexpect
child = pexpect.spawn("ssh [email protected] -p 2222")
child.logfile = open("/tmp/mylog", "w")
child.expect(".*assword:")
child.send("XXXXXXX\r")
child.expect(".*\$ ")
child.sendline("ls\r")
child.expect(".*\$ ")
go to open your logfile:- go to terminal
$gedit /tmp/mylog
As Per https://pexpect.readthedocs.io/en/stable/api/pexpect.html#spawn-class
# In Python 3, we'll use the ``encoding`` argument to decode data
# from the subprocess and handle it as unicode:
child = pexpect.spawn('some_command', encoding='utf-8')
child.logfile = sys.stdout
Solution 4
I think all you need is:
p = pexpect.spawn('ls')
p.expect(pexpect.EOF)
print(p.before)
or
p = pexpect.spawn('/bin/ls')
p.expect(pexpect.EOF)
print(p.before)
or
p = pexpect.spawn('/bin/bash -c "ls"')
p.expect(pexpect.EOF)
print(p.before)
or even
print(pexpect.run('ls'))
Solution 5
import sys
import pexpect
child = pexpect.spawn('ls')
child.logfile = sys.stdout
child.expect(pexpect.EOF)
Author by
user2579116
Updated on July 09, 2022Comments
-
user2579116 almost 2 years
child = pexpect.spawn ('/bin/bash') child.sendline('ls') print(child.readline()) print child.before, child.after
All I get with this code in my output is
ls ls
But when my code is
child = pexpect.spawn('ls') print(child.readline()) print child.before, child.after
Then it works, but only for the first 2 prints. Am I using the wrong send command? I tried send, write, sendline, and couldn't find anymore.