[Tutor] How to get the element from a list

[Mats Wichmann]

On 11/13/19 1:22 PM, Eggo why wrote:
> Hi All,
> I have a list like this "line = [{'logname; : 'c:/tmp/alert', 'creationTime': 1573664115985},{'logname; : 'c:/tmp/audit', 'creationTime': 1573664115985}]" and I would like to retrieve the "logname" from it.  What is the easiest way to do so?
> 
> Gary

let me take a wild guess: you're processing some json files?

presuming what you're looking for is to extract *each* logname value, 
you can use a list comprehension. You're going to loop over the elements 
of the list, each of which is a dictionary, and index into each element 
to pick out the value of the 'logname' key.  At the risk of "solving a 
homework problem" (which I hope this is not), that could look like this:

lognames = [ d['logname'] for d in line ]

if there's a chance not all of the elements (dictionaries) have 
'logname' entries, then you need to get a little more sophisticated, or 
it will fail with an exception.