使用python easysnmp捕获异常

Question

我似乎找不到如何使用Python的easySNMP库捕获异常的文档或示例

https://easysnmp.readthedocs.io/en/latest/exceptions.html显示了哪些异常被删除，但我在尝试捕获它们时出错

简化代码：

from easysnmp import Session
try:
session = Session(hostname=host,community=community, version=2)
except:
print("ERROR - SNMP error:")
sys.exit(3)    
def check_snmp(oid):
try:
ret = session.get(oid).value
except easysnmp.EasySNMPNoSuchInstanceError:
## Return false if OID doesn't exists
return 0
except session.EasySNMPError as e:
## Print the error on general errors
print("ERROR - SNMP error: {}".format(e))
return 1
if check_snnp('ifalias.4'):
print("SNMP returned true")

输出：

Traceback (most recent call last):
File "./check_ip_route", line 72, in <module>
if check_snmp(oid):
File "./check_snmp", line 45, in check_snmp
except easysnmp.EasySNMPNoSuchInstanceError:
NameError: name 'easysnmp' is not defined

Answer 1

您的错误显示name 'easysnmp' is not defined.

那是因为你还没有进口。

相反，您导入了from easysnmp import Session

你需要做import easysnmp