我无法在多ssh环境中使用pexpect获取日志数据

Question

我有一个开关，我可以在其中显示配置匹配：

admin@sele> show configuration | display set | match " ge-0/0/1 "   
set interfaces ge-0/0/1 unit 0 family ethernet-switching interface-mode access
set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan members vlan106
set interfaces ge-0/0/1 unit 0 family ethernet-switching filter input Interface-Limit-100m
set class-of-service interfaces ge-0/0/1 shaping-rate 100m

{master:0}
admin@sele> 

配置数据为：

set interfaces ge-0/0/1 unit 0 family ethernet-switching interface-mode access
set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan members vlan106
set interfaces ge-0/0/1 unit 0 family ethernet-switching filter input Interface-Limit-100m
set class-of-service interfaces ge-0/0/1 shaping-rate 100m

现在我想使用pexpect来获取配置数据

import pexpect

child = pexpect.spawn('ssh root@14.54.24.9')
child.expect('Password:')
child.sendline('password')
child.expect('#')

child.sendline('ssh admin@10.10.10.1')
child.expect('Password:')
child.sendline('my juniper switch password')
child.expect('>')

print('ldl1: ' ,child.before)
child.sendline('show configuration | display set | match " ge-0/0/1 "')
print('ldl2: ' ,child.before)
print('ldl2: ' ,child.after)
print('ldl2: ' ,child.buffer)

日志：

ldl1:  b'\r\n--- JUNOS 14.1X53-D47.3 built 2018-05-11 01:30:52 UTC\r\n{master:0}\r\nadmin@sele'
ldl2:  b'\r\n--- JUNOS 14.1X53-D47.3 built 2018-05-11 01:30:52 UTC\r\n{master:0}\r\nadmin@sele'
ldl2:  b'>'
ldl2:  b' '

在那里我无法获得配置数据。你知道吗

---

编辑-01

我用睡眠的时间5秒，然后它还是问题，之前或之后都没有收到日志。你知道吗

import time
...
child.sendline('show configuration | display set | match " ge-0/0/1 "')
time.sleep(5)
print('ldl2: ' ,child.before)
print('ldl2: ' ,child.after)
print('ldl2: ' ,child.buffer)