Python Lists: Medical Insurance Project

Data Science
1

I’m stuck on Task 8 which asks me to Print estimated_insurance_data

I’m getting a NameError which says maria_insurance_cost is not defined, but it is on line 20

any tips? thank you!

2

You do have maria_insurance_cost defined on line 20, but look at which line is throwing the error.

Hint if needed

Normally a program can’t perform an action with a variable that has not yet been initialized.

3

so line 14 is throwing the error, but why aren’t lines 15 and 16 throwing the same errors because I can’t see a difference between them?

and sorry I don’t understand which variable hasn’t been initialised?

thank you for your help!

4

Actually if you fix line 14, 15 and 16 will throw the same error, but with the variables rohan_insurance_cost and valentina_insurance_cost because they have not been initialized yet either.
The reason it doesn’t throw the errors now is because of how the Python interpreter works. Python files are compiled on running, this means that it will only catch the first error and then stop the program.

Defined might have been a better word to use on my part.
If you look at the error you are getting, it’s a NameError stating that:

name maria_insurance_cost is not defined

This means that within your program there you are trying to use the name maria_insurance_cost but it has not been defined yet. As such the interpreter doesn’t know what the name means and it can’t do anything with it. In Python you need to declare a variable before it is used in the code. For example you can type:

message = "Hello World"
print(message)

But you can’t do:

print(message)     # message has not been created yet and can't be used
message = "Hello World"
5

aah ok thank you got it! sorry I was being slow

so I’ve just defined each person’s insurance cost, e.g. maria_insurance_cost = 4150

thank you!

1 Like
6

Python Lists: Medical Insurance Estimation Project

Soo… I’m trying my hands on this extra question under this project but I’m not getting it.

Congratulations! In this project, you used Python lists to store estimated insurance cost data and then compare that data to actual insurance cost data.

As you’ve seen, lists are data structures in Python that can contain multiple pieces of data in a single object. As a data scientist, you’ll find yourself working with this data structure quite often. You now have a solid foundation to move forward in your data science journey!

If you’d like additional practice on lists, here are some ways you might extend this project:

  • Calculate the difference between the actual insurance cost data and the estimated insurance cost data for each individual, and store the results in a list called insurance_cost_difference.
  • Estimate the insurance cost for a new individual, Akira, who is a 19 year-old male non-smoker with no children and a BMI of 27.1. Make sure to append his name to names and his actual insurance cost, 2930.0, to insurance_costs.

Happy coding!

Having problems with the * difference*

please someone should help with a solution and explanation.

7

This is my take on calculating the difference between actual and estimate:

insurance_cost_difference =

# estimated insurance cost for each individual

estimated_insur_cost_maria = estimated_insurance_data[0][1]

estimated_insur_cost_rohan = estimated_insurance_data[1][1]

estimated_insur_cost_valentina = estimated_insurance_data[2][1]

# actual insurance cost for each individual

actual_insur_cost_maria = insurance_data[0][1]

actual_insur_cost_rohan = insurance_data[1][1]

actual_insur_cost_valentina = insurance_data[2][1]

# difference in actual and estimated insurance cost for each individual

insurance_cost_difference_maria = float(actual_insur_cost_maria) - float(estimated_insur_cost_maria)

insurance_cost_difference_rohan = float(actual_insur_cost_rohan) - float(estimated_insur_cost_rohan)

insurance_cost_difference_valentina = float(actual_insur_cost_valentina) - float(estimated_insur_cost_valentina)

#append insurance cost difference values to insurance cost difference list

insurance_cost_difference.append((insurance_cost_difference_maria,insurance_cost_difference_rohan,insurance_cost_difference_valentina))

#print final value

print("The difference between acutal insurance cost data and the estimated insurance cost data for each individual is: " + str(insurance_cost_difference))

Not sure if there is an easier way but this works for me

1 Like
8

Thank you very much for your suggestion