Fixing Difficult Errors |Section 2|Celestial Warrior

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Great, welcome again to this new video.

This is the third video about errors. We

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talked about syntax errors, we talked

about exceptions, and now we're going to

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talk about how to fix an error when you

don't understand the message, so let's

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focus on this error, a zero division error.

In case you were good in mathematics you

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could easily fix this error so you

you'll be able to understand that you

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cannot divide c by, you cannot divide

a number by 0 so you'd fix this by

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removing this expression here. However if

you were not that good in mathematics you

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may find this difficult to understand.

In that case the fastest way to fix this

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error is by copying this line here.

Control C, so select it copy it with ctrl

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C or right click and copy there and then

go to Google. Just paste it. Now on Google

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this got around a hundred thousand

results so Python is very popular and

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you'll get a solution for almost every

problem that you'll get with Python

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so before looking at documentation or

asking a question somewhere it's very

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likely that someone else has had your

issue before and i have asked a question

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about that and there is a solution about

that as well.

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And a very good question and answer

website is stackoverflow.com and

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almost always when you search for an

error on Google the first results will

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be from stackoverflow and so someone

has asked a question with this title. It says

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I faced an error when I run the program

using Python. So it's the same things as

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error as you like that. How to avoid that

error? And if it also talks about the

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desired output.

And there are two answers for this

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question. tThe answer with this green mark

here is the accepted answering and it

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has and it has the most up votes so 11

and this has 2 down votes some minus 2.

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Actually the difference between up votes

and down votes is in the favor of

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down votes and so these are two different

answers that you can look at. Usually you

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want to look at the accepted answer that

has the solution, however in this case

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this also has the explanation it says

you cannot divide by 0. This causes

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Python to raise an error. That's single

good answer and I think it didn't

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deserve to get to have this

balance of votes, but this one gives a

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solution on how to handle an error and

that takes us to another concept which

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is handling errors in Python. So let's

say you have a program you have a

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function that gets two input values and

then it divides those two input values.

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However sometimes the user may pass zero as

as a second input and in that

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case if you divide, let's say the first

value would be 2 and the second value

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would be 0, your program would crash and

if you want you can use exception

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handling to actually avoid that program

from crashing. And you can do that with a

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try and accept statements. Anyway we'll

cover that in the next lectures in this

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section. So this was about searching

for an error on Google and you can

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easily find the solution to that as you

see. These are very clear questions. It's

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a big community and everyone can vote up

and down and can comment and so

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basically the answers are very accurate.

However you'll not always find an answer on

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Google.

In that case it's time to ask your own

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question, so the first thing is again you

check if you understand the error and

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fix it if you understand it. The second

thing is you do a search on Google and

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if the first to fail to solve your

problem, then it's time to ask a question.

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And you can ask a question either inside

the course, so you can, while watching a

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video you can browse Q&A which stands

for question and answer and you can do a

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quick search if you find an existing

answer to your question here and if you

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cannot find it then you can ask a

question, or you can ask a question on

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stackoverflow. You can use this button

here, ask a question and I'll be happy to

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help you here on the course interface

Q&A section.

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Or other people can also help you own

stackoverflow, however something is very

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important to know. The structure of your

question is very important on getting a

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good answer. You know sometimes

there are very bad questions like let's

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say my code is not working how do I fix

this and that's all. With that very

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little information is very hard to get a

good answer so it's very important to

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ask a good question and I'll show you

how to ask a good programming question

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in the next lecture. So that's a very

important lecture as well. See you there!

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