CIS $1250$ Python

Competency $9$ Create a better class

Turn in Requirements:

$5$ pts$.$ Name your project LastnameFirstInitialP$9,$ such as CurtisIP$9.$

Documentation & Requirements:

$1.5$ pts$.$ Write the file name, your name, email address and purpose of the program at the top of your source code in a comment.

Example:

# GutierrezTP$9$

# Programmer: Thomas Gutierrez

# Email: tgutierrez$53$@cnm$.$edu

# Purpose: demonstrates how to define a class further

$2.10$ pts$.$ Add comments as appropriate.$$ Be sure that your program output is neatly presented to the user. Add documentation comments to your functions.

Program:

Worth $80$ pts$.$

You are going to modify the GeoPoint created in Program $6$ so that it has a default constructor and some properties.

$1.$ In your GeoPoint class make the following changes $($note your variable, parameter and method names may be different. Adjust as needed.$)$:

a$.$ Add a constructor $\_\_$init$\_\_($self$,$ lat$=0,$ lon$=0,$description $=$TBD$)$ that will initialize the class variables self.lat, self.lon and the self.description. Notice that the constructor will also default lat and lon to zero and description to $$TBD$$ if they are not provided.

b$.$ Change the SetPoint method so that instead of individual coordinates SetPoint$($self$,$ lat, lon$)$ it takes a single sequence$/$tuple$/$list$.$ SetPoint$($self$,$point$).$

self.lat $=$ point$[0]$

self.lon $=$point$[1]$

c$.$ Add a property: Point $=$ property$($GetPoint$,$SetPoint$).$ Make sure GetPoint and SetPoint are the names you used for the get and set methods you already wrote for points.

d$.$ Add another property: Description $=$ property$($GetDescription$,$ SetDescription$).$ Make sure GetDescription and SetDescription are the names you used for the get and set methods you already wrote.

e$.$ Change the distance method so that it takes a GeoPoint instead of coordinates: CalcDistance$($self$,$ point$)$ instead of CalcDistance$($self$,$ lat, lon$).$

lat$1=$ math.radians$($self$.$lat$)$

lon$1=$ math.radians$($self$.$lon$)$

lat$2=$ math.radians$($point$.$lat$)$

lon$2=$ math.radians$($point$.$lon$)$

$2.$ In the main part of your program do the following:

a$.$ Include the class.

b$.$ Instantiate two points

c$.$ Instead of using SetPoint and SetDescription methods to set each of the points locations and descriptions, do the following:

$$ i$.$ Use the constructor to set point$1$ coordinates and description. It should look something like the following but with your own coordinates and description:

point$1=$ GeoPoint$(12\mathrm{.}3456,-123\mathrm{.}4567,$'Loc$1\text{'})$

$$ ii$.$ Use a constructor without any arguments to instantiate the second point and use it$$s properties to set it$$s values. It should look something like the following but with your own coordinates and description:

point$2=$ GeoPoint$()$

point$2.$Point $=([23\mathrm{.}4567,-213\mathrm{.}456])$

point$2.$Description $=$ 'Loc$2\text{'}$

$$

d$.$ Inside the $$Do another $($y$/$n$)?$ loop do the following:

$$ i$.$ Ask the user for their location: latitude, longitude, and description of location.

$$ ii$.$ Create a third point to represent the user$$s location. You can use either the constructor or properties. With a constructor it will look something like the following:

pointUser $=$ GeoPoint$($lat$,$lon, 'User Location'$)$

$$ iii.$$ Use point$1$ and point$2$s Distance method to find the distance from each point to the user$$s location. Notice we are passing in the users point rather than the separate coordinates:

distanceToOne $=$ point$1.$calcDistance$($pointUser$)$

distanceToTwo $=$ point$2.$calcDistance$($pointUser$)$

$$ iv$.$ Tell the user which point they are closest to in this format:

You are closest to which is located at

$$ v$.$ Ask $$Do another $($y$/$n$)?$ and loop if they respond with $$y$$

$$

Extra Credit $($Worth $10$ Points$)$:

Turn your GeoPoint class into a library and import that into your main program. Perform the same steps required of your program just as GeoPoint as an imported class module instead.

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