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I have some data from a questionnaire that measures frequency of entering a shop ("_freq") and enjoyment of the experience ("_enj"). Overall, there are 17 shops (shop1, shop2, ...) and 120 rows of data. Below is an example of 5 rows of data for just shop 1 and 2.

I have written a for loop that labels incorrect responses to the questionnaire as "999" so that I can identify them. Basically, for each shop in isolation, a response is incorrect if frequency is 0 and enjoyment is not 9, or the reverse, if frequency is not 0 but enjoyment is 9. At the moment I am repeating the loops below 17 times (individually for each shop, below is just shop 1).

so as stated iam a total newbie beginner at programming, iam starting off my practising with making a little quizz program.

Iam trying to return people to the same question if they answered wrong. ive tried putting it all in a while loop and making the while loop run untill the correct answer is done. but when i do while loops i cannot point at my "ask" variabel that contains the user input. if this makes sense i hope you can help :)

heres my code:

I have a list of dictionaries and five lists of words. I want to look if the words of the lists occur in the dictionaries. Therefore I used the the following code:

So I need to fetch the following JSON

I have a one page template that i am trying to modify so that on clicking particular links the user goes to a new page rather than scroll to a different section. I still want to keep the scroll to a section navigation but I have call to action buttons in those sections that need to go to different pages. The website is a wordpress site

Here is my js code:

Why do I get an overflow exception even if I apply the unchecked operator on an expression?

I'm hoping to round to two decimal places in a correlation matrix. The code I use for the matrix is this:

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I was trying to make a variable inaccessible for a project I'm doing, and I ran across an SO post on Does Python have “private” variables in classes?. For me, it raised some interesting questions that, to try and make this answerable, I'll label with ^Q1 , ^Q2 , etc. I've looked around, but I didn't find answers to the questions I'm asking, especially to those about sensitive data.

I found useful stuff in that post, but it seems that the general consensus was something like if you see a variable with a _ before it, act like an adult and realize you shouldn't be messing with it. The same kind of idea was put forward for variables preceded by __. There, I got the general idea that you trust people not to use tricks like those described here and (in more detail) here. I also found some good information at this SO post.

This is all very good advice when you're talking about good coding practices.

I posted some thoughts in comments to the posts I've shared. My main question was posted as a comment.

I'm surprised there hasn't been more discussion of those who want to introduce malicious code. This is a real question: Is there no way in Python to prevent a black-hat hacker from accessing your variables and methods and inserting code/data that could deny service, reveal personal (or proprietary company) information^Q1? If Python doesn't allow this type of security, should it ever be used for sensitive data^Q2?

Am I totally missing something: Could a malicious coder even access variables and methods to insert code/data that could deny service or reveal sensitive data^Q3?

I imagine I could be misunderstanding a concept, missing something, putting a problem in a place where it doesn't belong, or just being completely ignorant on what computer security is. However, I want to understand what's going on here. If I'm totally off the mark, I want an answer that tells me so, but I would also like to know how I'm totally off the mark and how to get back on it.

Another part of the question I'm asking here is from another comment I made on those posts/answers. @SLott said (somewhat paraphrased)

... I've found that private and protected are very, very important design concepts. But as a practical matter, in tens of thousands of lines of Java and Python, I've never actually used private or protected. ... Here's my question "protected [or private] from whom?"

To try and find out whether my concerns are anything to be concerned about, I commented on that post. Here it is, edited.

Q: "protected from whom?" A: "From malicious, black-hat hackers who would want to access variables and functions so as to be able to deny service, to access sensitive info, ..." It seems the A._no_touch = 5 approach would cause such a malicious coder to laugh at my "please don't touch this". My A.__get_SSN(self) seems to be just wishful hoping that B.H. (Black Hat) doesn't know the x = A(); x._A__get_SSN() trick (trick by @Zorf).

I could be putting the problem in the wrong place, and if so, I'd like someone to tell me I'm putting the problem in the wrong place, but also to explain. Are there ways of being secure with a class-based approach^Q4? What other non-class-and-variable solutions are there for handling sensitive data in Python^Q5?

Here's some code that shows why I see the answers to these questions as a reason for wondering if Python should ever be used for sensitive data ^Q2. It's not complete code (why would I put these private values and methods down without using them anywhere?), but I hope it shows the type of thing I'm trying to ask about. I typed and ran all this at the Python interactive console.