Question

我是python的新手，正在寻找一些帮助将打印输出格式化为行和列。此数据最终将发送到csv文件。

该脚本将从多个主机中获取数据。行数是可变的，以及接口名称和描述的长度。

目前输出如下：

hostname IF-MIB::ifDescr.1 = GigabitEthernet0/0/0<br/>
hostname IF-MIB::ifAlias.1 = --> InterfaceDesc<br/>
hostname IF-MIB::ifOperStatus.1 = 'up'<br/>
hostname IF-MIB::ifDescr.2 = GigabitEthernet0/0/1<br/>
hostname IF-MIB::ifAlias.2 = --> InterfaceDesc<br/>
hostname IF-MIB::ifOperStatus.2 = 'up'<br/>
hostname IF-MIB::ifDescr.3 = GigabitEthernet0/0/2<br/>
hostname IF-MIB::ifAlias.3 = --> InterfaceDesc<br/>
hostname IF-MIB::ifOperStatus.3 = 'up'<br/>

我正在尝试将其格式化为以下行和列，每行包含标题（主机名，接口，接口desc和状态）。

hostname        interface              interface desc       status
hostname        GigabitEthernet0/0/0   InterfaceDesc        up
hostname        GigabitEthernet0/0/1   InterfaceDesc        up
hostname        GigabitEthernet0/0/2   InterfaceDesc        up

我目前拥有的打印代码就在这里。我想保留print语句的错误。

for errorIndication, errorStatus, errorIndex, varBinds in snmp_iter:
            # Check for errors and print out results
            if errorIndication:
                print(errorIndication)
            elif errorStatus:
                print('%s at %s' % (errorStatus.prettyPrint(),
                                errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
            else:
                for varBind in varBinds:
                    print(hostip),
                    print(' = '.join([x.prettyPrint() for x in varBind]))

完整脚本：

from pysnmp.hlapi import *

routers = ["router1"]

#adds routers to bulkCmd
def snmpquery (hostip):
    snmp_iter = bulkCmd(SnmpEngine(),
                        CommunityData('Community'),
                        UdpTransportTarget((hostip, 161)),
                        ContextData(),
                        0, 50,  # fetch up to 50 OIDs 
                        ObjectType(ObjectIdentity('IF-MIB', 'ifDescr')),
                        ObjectType(ObjectIdentity('IF-MIB', 'ifAlias')),
                        ObjectType(ObjectIdentity('IF-MIB', 'ifOperStatus')),
                        lexicographicMode=False) # End bulk request once outside of OID child objects
    for errorIndication, errorStatus, errorIndex, varBinds in snmp_iter:
        # Check for errors and print out results
        if errorIndication:
            print(errorIndication)
        elif errorStatus:
            print('%s at %s' % (errorStatus.prettyPrint(),
                            errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
        else:
            for rowId, varBind in enumerate(varBindTable):
                oid, value = varBind
                print('%20.20s' % value)
                if not rowId and rowId % 3 == 0:
                    print('\n')

# calls snmpquery for all routers in list
for router in routers:
    snmpquery(router)

非常感谢您提供的任何帮助。谢谢！

Answer 1

假设使用三个SNMP表列初始化snmp_iter：

snmp_iter = bulkCmd(SnmpEngine(),
                    UsmUserData('usr-md5-des', 'authkey1', 'privkey1'),
                    Udp6TransportTarget(('demo.snmplabs.com', 161)),
                    ContextData(),
                    0, 25,
                    ObjectType(ObjectIdentity('IF-MIB', 'ifDescr')),
                    ObjectType(ObjectIdentity('IF-MIB', 'ifAlias')),
                    ObjectType(ObjectIdentity('IF-MIB', 'ifOperStatus')))

你可以确定（对于 GETNEXT 和 GETBULK 命令）pysnmp总是以行方式返回矩形表。

知道你要求的列数（3）你应该能够逐行打印输出：

for rowId, varBind in enumerate(varBindTable):
    oid, value = varBind
    print('%20.20s' % value)
    if not rowId and rowId % 3 == 0:
        print('\n')

格式化多行PYsnmp 4.4打印输出到行和列Python 2.7

1 个答案: