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非常不寻常的一个，但我正在尝试匹配来自 SSH 会话的输出，该会话可能会折叠视图并低于所需的输出（如折叠的列）......

看一下示例输出：

      System Id     Interface          Circuit Id        State HoldTime Type     PRI
--------------------------------------------------------------------------------
rtr1.lab01.some GE0/0/1            0000000001         Up   22s      L2       -- 
thing                                                                              
rtr2.lab01.some GE0/0/2            0000000002         Up   24s      L2       -- 
thingelse

我可以将第一行与：

^([a-zA-Z0-9][a-zA-Z0-9.-]+[a-zA-Z0-9])

它返回（rtr1.lab01.some 和 rtr2.lab01.some），但我试图找到基于完整主机名（rtr1.lab01.something 和 rtr2.lab01.somethingelse）匹配它的最简单方法

我也很好地匹配了其余的输出并且能够提取数据，但真的找不到实现我正在尝试的方法......有人能指出我正确的方向吗？进一步扩展（更多上下文......我在 Python 中使用 Google TextFSM 来匹配来自 SSH 会话的所有这些数据）

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1 回答 1

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import re

text = """System Id     Interface          Circuit Id        State HoldTime Type     PRI
--------------------------------------------------------------------------------
rtr1.lab01.some GE0/0/1            0000000001         Up   22s      L2       --
thing
rtr2.lab01.some GE0/0/2            0000000002         Up   24s      L2       --
thingelse
rtr2.lab01.abcd GE0/0/4            0000000003         Up   24s      L2       --
rtr2.lab01.none GE0/0/24           0000000004         Up   24s      L2       --
sense
rtr2.lab01.efgh GE0/0/5            0000000003         Up   24s      L2       --
"""

lines = text.rstrip().split('\n')[2:]
n_lines = len(lines)
current_line = -1

def get_next_line():
    # Actual implementation would be reading from a file and yielding lines one line at a time
    global n_lines, current_line, lines
    current_line += 1
    # return special sentinel if "end of file"
    return  lines[current_line] if current_line < n_lines else '$'


def get_system_id():
    line = None
    while line != '$': # loop until end of file
        if line is None: # no current line
            line = get_next_line()
            if line == '$': # end of file
                return
        m = re.search(r'^([a-zA-Z0-9][a-zA-Z0-9.-]+[a-zA-Z0-9])', line)
        id = m[1]
        line = get_next_line() # might be sentinel
        if line != '$' and re.match(r'^[a-zA-Z0-9]+$', line): # next line just single id?
            id += line
            line = None # will need new line
        yield id

for id in get_system_id():
    print(id)

印刷：

rtr1.lab01.something
rtr2.lab01.somethingelse
rtr2.lab01.abcd
rtr2.lab01.nonesense
rtr2.lab01.efgh

见 Python 演示

于 2020-02-20T13:27:05.750 回答