Question

# Device details
device = "test"
user = "abc"
password = "123"

# Invoking remote session
client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(device, username=user, password=password)

# std commands to capture shell output
channel = client.invoke_shell()
stdin = channel.makefile('wb')
stdout = channel.makefile('rb')

# remote commands to run
stdin, stdout, stderr = client.exec_command('vmm ping | grep no-response')
noresponse = stdout.read()
print noresponse
#print some_string.split('', 1)[0]

noresponse = noresponse.split(' ', 1)[0]
print noresponse


# Close connections
stdout.close()
stdin.close()
client.close()

输出：

> C:\Python27\python.exe "C:/Python/Scripts/Login to Unix3.py"

R1_MPC00 10.49.123.146 no-response
R3_MPC00 10.49.122.24 no-response
R6_re 10.49.122.226 no-response
R7_re 10.49.122.217 no-response
R8_re 10.49.122.215 no-response
R11_MPC00 10.49.122.20 no-response
R14_re 10.49.122.152 no-response
R14_MPC00 10.49.122.151 no-response
R17_MPC00 10.49.122.129 no-response
R19_re 10.49.121.213 no-response
R20_re 10.49.121.206 no-response
SW2_MPC00 10.49.120.54 no-response
R1_MPC00

问题：

我需要输出的所有行中的第一个单词，而不仅仅是R1_MPC00。我怎样才能做到这一点？

Answer 1

pattern = r'[^.*\s]*'

with open('test.txt') as f:
     for line in f:
         match = re.search(pattern, line)
         if match:
             print(match.group())

是一个评论，您可以沿着换行符分割，然后使用列表理解进行拆分，这可能会更容易，但为什么在使用正则表达式时呢？< / p>

with open('test.txt') as file:
    words = [x for x in [l.split(' ')[0] for l in file.read().split('\n')] if x]

Answer 2

只需在noresponse

的内容中为每一行划分空格

noresponse = """\
R1_MPC00 10.49.123.146 no-response
R3_MPC00 10.49.122.24 no-response
R6_re 10.49.122.226 no-response
R7_re 10.49.122.217 no-response
R8_re 10.49.122.215 no-response
R11_MPC00 10.49.122.20 no-response
R14_re 10.49.122.152 no-response
R14_MPC00 10.49.122.151 no-response
R17_MPC00 10.49.122.129 no-response
R19_re 10.49.121.213 no-response
R20_re 10.49.121.206 no-response
SW2_MPC00 10.49.120.54 no-response
"""

for line in noresponse.splitlines():
    print(line.split(' ', 1)[0])

拆分多行输出？

2 个答案: