python执行if和else语句

Question

I have the problem that python us executing both if and else statement together

Please watch pic Pic of indent

I tried 'if not' and indendent the else but nothing seems to work.

Here is a part of my script. Im litte new to this so i would appreciate the help.

What i want to do is read if there is a 255.255.255.252 in the cofig. (this works and does change the config accordingly) But if there is no 255.255.255.252 there should be a print in my log.

the result is : (it does both)

2017-10-26 15:39:29,350 dailer 1 off IP testrouter is completed 2017-10-26 15:39:29,351 dailer 1 off IP lprm1212 has no /30

       for my_output in result0.split("\n"):
            if len(my_output) !=0:
                if  my_output.find("255.255.255.252") != -1:
                    print (my_output)
                    tn.read_until('')
                    tn.write("config terminal"+"\n")
                    tn.read_until("(config)#")
                    tn.write("interface Dialer1"+"\n")
                    tn.read_until("(config-if)#")
                    tn.write("description test"+"\n")
                    tn.write("end"+"\n")
                    logger.debug('dailer 1 off IP ' + host2login + ' is completed')
                 else:
                     logger.debug('dailer 1 off IP ' + host2login + ' has no /30')
             else:
                 logger.debug('dailer 1 off IP ' + host2login + ' has no /30')
        else:
            logger.debug('dailer 1 off IP ' + host2login + ' has no /30')

Answer 1

You have the indentation all over the place. If and else have to be on the same indentation like so:

for my_output in result0.split("\n"):
    if len(my_output) !=0:
        if  my_output.find("255.255.255.252") != -1:
            print (my_output)
            tn.read_until('')
            tn.write("config terminal"+"\n")
            tn.read_until("(config)#")
            tn.write("interface Dialer1"+"\n")
            tn.read_until("(config-if)#")
            tn.write("description test"+"\n")
            tn.write("end"+"\n")
            logger.debug('dailer 1 off IP ' + host2login + ' is completed')
        else:
            logger.debug('dailer 1 off IP ' + host2login + ' has no /30')

In this case, your else belongs to the second if, while the first if does not have a else case.

Answer 2

The problem with your code is indentation , if(s) and else(s) which relate to each other "MUST" be in the same indentation level :

# code
if x<0:
    # do something
else:
    # do something else
# code