Python Forum

Comment lines 23 and 24.

Thanks, something is going wrong and not able to understand, if I am accessing class in loop and get class method variable values.

from easysnmp import Session
import time
from datetime import datetime
import datetime
#from collections import namedtuple
  
class fan:
    """\
    this class to collect information about fan speed and fan status
    final output will be like below
    -------------------------------------------------------------------------------
    Environment Information
 
    Number of fan trays               : 1
    Number of fans                    : 3
 
    Fan tray number                   : 1
       Speed                           : half speed
       Status                          : up
   -------------------------------------------------------------------------------"""
     
     
     
    #convert oid number in to fan speed , str oid value
    # dict for FanSpeed oid output value    
    fan_speed =  { 0:'Not Applicable',
                  1:'Unknown',
                  2:'Half Speed',
                  3:'Full Speed',
                  4:'Low Speed'
                }
    #convert oid output in fan status, str oid value 
    #Dict for Fanstatus oid output values
    fan_status = { '1':'Unknown',
                  '2':'Fan Removed',
                  '3':'Up',
                  '4':'Fail',
                  '5':'Out of Service'
                }
        
    def __init__(self,host,community,version,timeout,value):
        self.host = host
        self.community = community
        self.version = version
        self.timeout = timeout
    
    #@classmethod
    # return fan speed and parameter will be oid value
    def get_fan_speed(self, value):
        return self.fan_speed.get(value,"other")
             
    #return fan status, parameter will be oid value
    def get_fan_status(self,value):
        return self.fan_status.get(value,"other")
  
   
    def get_fan_details(host):
           # establish easysnmp session with host
           session = Session(hostname=host, community="cacti", version=2,timeout=5)
           # start bulkwalking snmp oids 
           tmnxChassisNumFanTrays = session.bulkwalk('1.3.6.1.4.1.6527.3.1.2.2.1.3.1.10')
           NumFanTrays = str(u"{value}".format(value=tmnxChassisNumFanTrays[0].value))
           tmnxChassisNumFans = session.bulkwalk('1.3.6.1.4.1.6527.3.1.2.2.1.3.1.11')
           NumFans = str(u"{value}".format(value=tmnxChassisNumFans[0].value))
           tmnxChassisFanSpeed = session.bulkwalk('1.3.6.1.4.1.6527.3.1.2.2.1.4.1.3')
           FanSpeed = str(u"{value}".format(value=tmnxChassisFanSpeed[0].value))
           tmnxChassisFanOperStatus = session.bulkwalk('1.3.6.1.4.1.6527.3.1.2.2.1.4.1.2')
           FanOperStatus = str(u"{value}".format(value=tmnxChassisFanOperStatus[0].value))
           return NumFanTrays, NumFans, FanSpeed,FanOperStatus
           # returning output as str
if __name__ == "__main__":
        hosts = ['10.124.209.66','10.124.209.74']
        for host in hosts:
            #print(host)
            try:
                fandetails  = fan.get_fan_details(host)
            except:
                break
            print(fandetails) # able to print
            NumFanTrays = fandetails[0] # able to print
            NumFans = fandetails[1] # able to print
            #Fanspeed = fandetails[2]
            #FanStatus = fandetails[3]
            #print(type(FanStatus)) 
            Fanspeed = fan.get_fan_speed(str(2))
            FanStatus = fan.get_fan_status(str(2))
            print('Num Of Tray:{} Number of Fans: {} Fan Speed:{} Fan Status:{}'.format(NumFanTrays,NumFans,Fanspeed,FanStatus))

able to print fandetails, however not able to access dict values

Output:
('1', '3', '2', '3')

Error:
Traceback (most recent call last):
  File "testclass3.py", line 87, in <module>
    Fanspeed = fan.get_fan_speed(str(2))
TypeError: get_fan_speed() missing 1 required positional argument: 'value'

Here is a simple example to show what's happening in your case

>>> class A:
...     def get_spam(self, ham):
...         return 3.14
... 
>>> A.get_spam()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: get_spam() missing 2 required positional arguments: 'self' and 'ham'
>>> a = A() # <--- Creating a class INSTANCE
>>> a.get_spam()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: get_spam() missing 1 required positional argument: 'ham'
>>> a.get_spam('egg')
3.14

thanks, got some idea... will let you know.

thanks,Gribouillis and all admin and moderator

Changed code, its working for me, but having small question, how can I can parse data inside class and return dict.

from easysnmp import Session
import time
from datetime import datetime
import datetime
#from collections import namedtuple
  
class fan:
    """\
    this class to collect information about fan speed and fan status
    final output will be like below
    -------------------------------------------------------------------------------
    Environment Information
 
    Number of fan trays               : 1
    Number of fans                    : 3
 
    Fan tray number                   : 1
       Speed                           : half speed
       Status                          : up
   -------------------------------------------------------------------------------"""
     
     
     
    #convert oid number in to fan speed , str oid value
    # dict for FanSpeed oid output value    
    fan_speed =  { 0:'Not Applicable',
                  1:'Unknown',
                  2:'Half Speed',
                  3:'Full Speed',
                  4:'Low Speed'
                }
    #convert oid output in fan status, str oid value 
    #Dict for Fanstatus oid output values
    fan_status = { '1':'Unknown',
                  '2':'Fan Removed',
                  '3':'Up',
                  '4':'Fail',
                  '5':'Out of Service'
                }
        
    def __init__(self,host,community,version,timeout):
        self.host = host
        self.community = community
        self.version = version
        self.timeout = timeout
    
    def get_fan_details(self):
           # establish easysnmp session with host
           session = Session(hostname=self.host, community='cacti', version=2,timeout=5)
           # start bulkwalking snmp oids
           tmnxChassisNumFanTrays = session.bulkwalk('1.3.6.1.4.1.6527.3.1.2.2.1.3.1.10')
           NumFanTrays = str(u"{value}".format(value=tmnxChassisNumFanTrays[0].value))
           tmnxChassisNumFans = session.bulkwalk('1.3.6.1.4.1.6527.3.1.2.2.1.3.1.11')
           NumFans = str(u"{value}".format(value=tmnxChassisNumFans[0].value))
           tmnxChassisFanSpeed = session.bulkwalk('1.3.6.1.4.1.6527.3.1.2.2.1.4.1.3')
           FanSpeed = str(u"{value}".format(value=tmnxChassisFanSpeed[0].value))
           tmnxChassisFanOperStatus = session.bulkwalk('1.3.6.1.4.1.6527.3.1.2.2.1.4.1.2')
           FanOperStatus = str(u"{value}".format(value=tmnxChassisFanOperStatus[0].value))
           # returning dict
           return {
                   'NumOfFantrays':NumFanTrays,
                   'NumofFans':NumFans,
                   'FanSpeed':FanSpeed,
                   'FanStatus':FanOperStatus
                  }
           """ how can I return dict value from this class... 
               like
               return {
                   'NumOfFantrays':NumFanTrays,
                   'NumofFans':NumFans,
                   'FanSpeed':fan.get_fan_speed(FanSpeed),
                   'FanStatus':fan.fan_status.get(FanOperStatus)
                  }
           """
    
    # return fan speed and parameter will be oid value
    def get_fan_speed(self, value):
        return self.fan_speed.get(value,"other")
         
    #return fan status, parameter will be oid value
    def get_fan_status(self,value):
        return self.fan_status.get(value,"other")
  
           
if __name__ == "__main__":
        a = fan('10.124.209.66','cacti',2,5)
        data = a.get_fan_details()
        for item in data.items():
            print(item)

current out put

Output:
'NumOfFantrays', '1')
('NumofFans', '3')
('FanSpeed', '2')
('FanStatus', '3')

expected output

Output:
('NumOfFantrays', '1')
('NumofFans', '3')
('FanSpeed', 'Half Speed')
('FanStatus', 'Up')

I don't understand the output that you want. Obviously the method already returns a dict.

your def get_fan_details() method does not use the other two methods def get_fan_speed() and get_fan_status():

return {
                   'NumOfFantrays':NumFanTrays,
                   'NumofFans':NumFans,
                   'FanSpeed':self.get_fan_speed(FanSpeed),
                   'FanStatus':self.get_fan_status(FanOperStatus)
                  }

if you are not able to debug soemthing like this, better read again some class basics tutorial

(Oct-27-2019, 05:06 PM)Gribouillis Wrote: [ -> ]I don't understand the output that you want. Obviously the method already returns a dict.

but i want return dict values from class itself, instead of converting outof class.

Thanks, Yoriz,Gribouillis,ichabod801,buran

got some knowledge on Class, method.