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So friends, how did you get on now? I will say if this is the first time you're

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using Python

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This is quite a challenge

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So definitely do not beat yourself up if you found this really quite confusing

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So quite honestly even if you only got part of this challenge done

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Then that is really quite good if you got all of the challenge done then

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honestly I'm quite impressed

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So let's walk through the solution the very first thing that I want you to do

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is to create a list that is comprised of four elements

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OSPF EIGRP, BGP and RIP so let's go and do that then

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We go to this browser here. Let's open this up and what I will do is I will
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X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000

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We go to this browser here. Let's open this up and what I will do is I will

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create my list now

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I can call the list to anything ISO wish just choose a variable name so long as

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we are following the conventions that we specified before

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So in my case here

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I will just choose to call this list routing protocols something nice and

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descriptive once again

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This is good practice now how do we actually create a list you remember?

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We're going to use square brackets and each element within the list is going to

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be separated by commas now each element

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It also has to be a string so we're going to make sure each element has

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quotation marks
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X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000

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quotation marks

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So what was the first value? It was OSPF then EIGRP, BGP and RIP so also OSPF

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comma then EIGRP comma

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Then BGP comma and then finally RIP so if you manage this part then you were

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successfully able to create the first part of the challenge

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Now let's go to the next part

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We want to include a for loop to iterate through each element and

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Print it so I will use the for keyword now I can choose a variable name

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anything I also choose but again

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It does make sense to use one that is pretty descriptive so I don't want to say
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It does make sense to use one that is pretty descriptive so I don't want to say

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for pizza and routing protocols after all much more

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sensible instead to choose the name protocol

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So I will have my colon here and if I hit return we're going to indent within

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and all I will simply do now is to print out the

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Protocol variable that I'm looping through okay

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So if I go down here and I choose to run this give a moment as we can see here

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We are printing out each individual value here's OSPF EIGRP BGP and RIP the

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last portion of the challenge
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X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000

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last portion of the challenge

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And that's probably the hardest bits is to modify the logic to include a single

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conditional check

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We want to check that if the string BGP is within the list

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We want to print at the statement that is an exterior gateway protocol

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available

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So let's try this then so scrolling on up as opposed to just printing this here

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Let's modify this and we'll run the check we'll say if the protocol we're

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looking through is equal to

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And we'll say BGP then I'll have my colon and then indented within I'm simply

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going to print out the statements

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There is an exterior gateway protocol available
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X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000

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There is an exterior gateway protocol available

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So now if I get down and I run this here and look at it right here

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It says there is an exterior gateway protocol available

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So friends that is us for our validation challenge

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I hope it's been informative for you and I'd like to thank you for viewing