compare two list of dictionaries

[Tobiah]

On 10/03/2013 09:11 AM, Mohan L wrote:
> Dear All,
>
> I have two list of dictionaries like below:
>
> In the below dictionaries the value of ip can be either hostname or ip address.
>
> output1=[
> {'count': 3 , 'ip': 'xxx.xx.xxx.1'},
> {'count': 4, 'ip': 'xxx.xx.xxx.2'},
> {'count': 8, 'ip': 'xxx.xx.xxx.3'},
> {'count': 10, 'ip': 'xxx.xx.xxx.4'},
> {'count': 212, 'ip': 'hostname1'},
> {'count': 27, 'ip': 'hostname2'},
> {'count': 513, 'ip': 'hostname3'},
> {'count': 98, 'ip': 'hostname4'},
> {'count': 1, 'ip': 'hostname10'},
> {'count': 2, 'ip': 'hostname8'},
> {'count': 3, 'ip': 'xxx.xx.xxx.11'},
> {'count': 90, 'ip': 'xxx.xx.xxx.12'},
> {'count': 12, 'ip': 'xxx.xx.xxx.13'},
> {'count': 21, 'ip': 'xxx.xx.xxx.14'},
> {'count': 54, 'ip': 'xxx.xx.xxx.15'},
> {'count': 34, 'ip': 'xxx.xx.xxx.16'},
> {'count': 11, 'ip': 'xxx.xx.xxx.17'},
> {'count': 2, 'ip': 'xxx.xx.xxx.18'},
> {'count': 19, 'ip': 'xxx.xx.xxx.19'},
> {'count': 21, 'ip': 'xxx.xx.xxx.20'},
> {'count': 25, 'ip': 'xxx.xx.xxx.21'},
> {'count': 31, 'ip': 'xxx.xx.xxx.22'},
> {'count': 43, 'ip': 'xxx.xx.xxx.23'},
> {'count': 46, 'ip': 'xxx.xx.xxx.24'},
> {'count': 80, 'ip': 'xxx.xx.xxx.25'},
> {'count': 91, 'ip': 'xxx.xx.xxx.26'},
> {'count': 90, 'ip': 'xxx.xx.xxx.27'},
> {'count': 10, 'ip': 'xxx.xx.xxx.28'},
> {'count': 3, 'ip': 'xxx.xx.xxx.29'}]
>
>
> In the below dictionaries have either hostname or ip or both.
>
> output2=(
>
> {'hostname': 'INNCHN01', 'ip_addr': 'xxx.xx.xxx.11'},
> {'hostname': 'HYDRHC02', 'ip_addr': 'xxx.xx.xxx.12'},
> {'hostname': 'INNCHN03', 'ip_addr': 'xxx.xx.xxx.13'},
> {'hostname': 'MUMRHC01', 'ip_addr': 'xxx.xx.xxx.14'},
> {'hostname': 'n/a', 'ip_addr': 'xxx.xx.xxx.15'},
> {'hostname': 'INNCHN05', 'ip_addr': 'xxx.xx.xxx.16'},
> {'hostname': 'hostname1', 'ip_addr': 'n/a'},
> {'hostname': 'hostname2', 'ip_addr': 'n/a'},
> {'hostname': 'hostname10', 'ip_addr': ''},
> {'hostname': 'hostname8', 'ip_addr': ''},
> {'hostname': 'hostname200', 'ip_addr': 'xxx.xx.xxx.200'},
> {'hostname': 'hostname300', 'ip_addr': 'xxx.xx.xxx.400'},
>
> )
>
> trying to get the following difference from the above dictionary
>
> 1). compare the value of 'ip' in output1 dictionary with either 'hostname' and 'ip_addr' output2 dictionary and print their
> intersection. Tried below code:
>
>
> for doc in output1:
>          for row in output2:
>                  if((row["hostname"] == doc["ip"]) or (row["ip_addr"] == doc["ip"])):
>                          print doc["ip"],doc["count"]
>
> *output:*
> hostname1 212
> hostname2 27
> hostname10 1
> hostname8 2
> xxx.xx.xxx.11 3
> xxx.xx.xxx.12 90
> xxx.xx.xxx.13 12
> xxx.xx.xxx.14 21
> xxx.xx.xxx.15 54
> xxx.xx.xxx.16 34
>
> 2). need to print the below output if the value of 'ip' in output1 dictionary is not there in in output2 dictionary(ip/hostname
> which is there in output1 and not there in output2):
>
>   xxx.xx.xxx.1 3
>   xxx.xx.xxx.2 4
>   xxx.xx.xxx.3  8
>   xxx.xx.xxx.4  10
>   hostname3  513
>   hostname4  98
>   xxx.xx.xxx.17  11
>   xxx.xx.xxx.18  2
>   xxx.xx.xxx.19  19
>   xxx.xx.xxx.20  21
>   xxx.xx.xxx.21  25
>   xxx.xx.xxx.22  31
>   xxx.xx.xxx.23  43
>   xxx.xx.xxx.24  46
>   xxx.xx.xxx.25  80
>   xxx.xx.xxx.26  91
>   xxx.xx.xxx.27  90
>   xxx.xx.xxx.28  10
>   xxx.xx.xxx.29  3
>
> 3). Ip address with is there only in output2 dictionary.
>
> xxx.xx.xxx.200
> xxx.xx.xxx.400
>
> Any help would be really appreciated. Thank you
>
> Thanks
> Mohan L

There is a bit of work that can be consolidated
to help both case 2 and 3.  Then both cases are
a little more straightforward:

##################################################

import itertools

inside_out = {x['ip']: x for x in output1}

set1 = set(inside_out.keys())

### CASE 2 ###
set2 = set(itertools.chain.from_iterable([x.values() for x in output2]))
for name in set1 - set2:
         print name, inside_out[name]['count']


### CASE 3 ###
set2 = set([x['ip_addr'] for x in output2])
print "\n".join(set2 - set1)