assignment 2 room area python answers

Assignment 2: Room Area

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Beginner Python Area of a room

Right now I am working on a program to calculate the area of a room in order to purchase cans of paint. I am just a three weeks into my class and I'm a little overwhelmed. I'm having trouble figuring out how I am supposed to attach each wall/ceiling/window/door to a separate name such as 'WALL1 WALL2' etc and then being able to call those to a calculation. As far as I have gotten I can't seem to figure out how to write this variable. I am by no means asking for the code to the whole program, so we will take a look at just walls as an example. "John wants to calculate how much paint he needs for a whole house and has 57 walls with various sizes of each wall." How do I allow an unlimited amount of walls to be used while attaching each wall to its Length and Height? Or should I limit the amount of walls? Once I establish how many of these walls there are how do I attach each wall to its own name? Each 'name' will then be called into the final calculation. Here is what I have so far:

I have provided my Flowchart here as reference so hopefully it makes better sense what I am trying to explain.

• Sounds like you're looking for a loop. I suggest having a look at your textbook. –  TigerhawkT3 Commented Jan 22, 2017 at 1:24
• And I strongly recommend you using class if you are allowed to. –  ᴀʀᴍᴀɴ Commented Jan 22, 2017 at 1:25
• 4 I don't know how you're expected to write Python without learning any Python. –  TigerhawkT3 Commented Jan 22, 2017 at 1:29
• 1 @Vincenzzzochi , because each area has some walls and windows and each of them have width and heights , I think class would be great here , but I am agree dictionary is good too , but the concept of class is more helpful –  ᴀʀᴍᴀɴ Commented Jan 22, 2017 at 1:45
• 1 Just out of curiousity, what class are you taking? We'd like to recommend people avoid the heck out of this class because it's terrible. –  Wayne Werner Commented Jan 23, 2017 at 11:31

3 Answers 3

You can use a list or a tuple to store your walls ceiling etc. then its a matter of running a For loop to do the calculation. You may also want to use a dictionary if you want to call the items by name.

You can create Wall1, Wall2 etc using a simple string addition and put that in the dictionary rather than creating variables for each element.

If you clarify how you gonna accept the user input for all 57 walls etc. we can answer more accurately.

• you say 'John wants to calculate how much paint he needs for a whole house and has 57 walls with various sizes of each wall'. So do you have to get all 57 walls sizes at once? or do you only need one wall at a time. Like lets say you let the user input the width, height and the type (wall, ceiling etc) then you output the calculated area and may be some type specific information? –  Kaveen Perera Commented Jan 22, 2017 at 1:57
• @Amerilys do you have any prior programming knowledge at all in any language? –  Kaveen Perera Commented Jan 22, 2017 at 2:03
• they would input the information for each wall one at a time. So it would ask how many walls do you have, so it knows a predetermined amount. Say it's six, it then prompts the user to input length and height for WALL1. Say I put in 13 length and 9 height. It should either do the calculation there and attached the result to WALL1 or hold the information to be calculated later. And I'm going with calculate now and hold the information to be called later. I'm taking an introductory class to HTML and CSS right now and I've messed around with some things prior but I've never learned. –  Amerilys Commented Jan 22, 2017 at 18:23

After our discussion in the comments, it appears that your real problem comes from not really understanding the relative difficulty of things yet . In large part that's because you don't really understand programming yet, you've just been making flowcharts in your class. There's a fair difference between flowcharts and programming, since with a flowchart you can just put something magic happens .

My first recommendation is to check out the Python style guide, called pep8 ). Most Python developers stick to this, and it will make your life easier when trying to communicate with us.

Next, you want to adjust your expectations. Trying to parse out a bunch of values from something like:

You can do it, but as a beginning developer it's a bit overwhelming. If you know regular expressions it's pretty trivial, but you don't, and they're not a beginning topic. Just remember the popular saying:

Developers see a problem and say, "Ah, I know, I'll use regular expressions!" Now they have two problems.

Most of the time they're the wrong thing, but occasionally they're the right thing. But as a beginner, they're not the right thing.

Instead, you should aim for something like this:

• get the project name
• ask the user for wall sizes. When they input an empty/blank string, that's the last wall size
• ask the user for ceiling sizes (though you could include this in the wall sizes, no need to have them different). When they input an empty/blank string there are no more ceilings.
• ask the user for the door sizes. Same thing about empty strings.
• ask the user for window sizes. The same thing applies for ceiling vs walls.
• combine the wall/ceiling sizes and subtract (door sizes + window sizes)

You can store the sizes in lists, e.g. walls = [[3, 4], [5, 9], [9, 9]] . Dealing with lists is something that you can learn in the Python tutorial, or many other tutorials on the Internet.

You can iterate (loop) over your lists and write that information to a file, if that's something that you want to do. Tutorials will also cover that.

If you take the above approach, you'll find that your project is much easier to complete. Good luck!

Have you considered using pandas data frames to store each instance of Wall, Window and Ceiling? Then you multiply your columns Width by Length and store it in the column Surface .

Then you can simply use the groupby function to get your totals and add up the results, or simply sum the Surface columns.

• 4 The user is just learning how to ride a bicycle, and you want to put a BMW M3 in front of him/her with pandas and the concept of dataframes? –  kingstante Commented Jan 22, 2017 at 1:45
• I come from R and use spreadsheet a lot, so I must admit I have a harder time not using them. Might be the accountant in me, but I get a better grasp on my data when they're in a matrix like object. –  Gelinator Commented Jan 22, 2017 at 1:51
• If you read the flowchart the OP posted it's clearly not what the exercise is after. –  Wayne Werner Commented Jan 22, 2017 at 2:19

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Question: You are asked to create a Python program that will calculate the area of a room with the dimensions of Length =10 and the Width =12. Requirements 1. You must include the following Python statements: assignment, print, calculation, comment 2. The program must use the following data: Length =10 Width =12 3. Use Microsoft Word or IDLE to document the program 4.

let's break down the task into three steps:

Step 1: Create the python program file

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Python Assignment Operator

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Write a program that asks the user to enter the width and length of a room.

Once these values have been read, your program should compute and display the area of the room.

The length and the width will be entered as floating-point numbers.

Include units in your prompt and output message; either feet or meters, depending on which unit you are more comfortable working with.

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Create a program that reads the length and width of a farmer's field from the user in feet.

Display the area of the field in acres.

Hint: There are 43,560 square feet in an acre.

A small deposit is added to drink containers to encourage people to recycle them.

Suppose drink containers holding one liter or less have a $0.10 deposit, and drink containers holding more than one liter have a $0.25 deposit.

Write a program that reads the number of containers of each size from the user.

Your program should continue by computing and displaying the refund that will be received for returning those containers.

Format the output so that it includes a dollar sign and two digits to the right of the decimal point.

The %.2f format specifier indicates that a value should be formatted as a floating-point number with 2 digits to the right of the decimal point.

Reading the cost of a meal ordered at a restaurant from the user.

Then your program will compute the tax and tip for the meal.

Use your local tax rate when computing the amount of tax owing.

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Format the output so that all of the values are displayed using two decimal places.

The \ at the end of the line is called the line continuation character.

It tells Python that the statement continues on the next line.

Do not include any spaces or tabs after the \ character.

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