Instructor note:

This is the Unit $4$ lab assignment deliverable $($our first lab$).$

Coding hints.

We need to change line #$3$ of the coding:

return $($kilos $*2\mathrm{.}204)$ #Please note that the $/$ sign needs to be switched to a $*$ sign.

Important Coding Guidelines:

Use comments, and whitespaces around operators and assignments. Use line breaks and indent your code. Use naming conventions for variables, functions, methods, and more. This makes it easier to understand the code. Write simple code and do not over complicate the logic. Code exhibits simplicity when it$$s well organized, logically minimal, and easily readable.

Auto$-$graded programming assignments may use a Unit test to test small parts of a program. Unlike a Compare output test, which evaluates your program's output for specific input values, a Unit test evaluates individual functions to determines if each function:

is named correctly and has the correct parameters and return type

calculates and returns the correct value $($or prints the correct output$)$

The zyLabs auto$-$grader runs main.py as a script. In main.py$,$ the line if $\_\_$name$\_\_==\text{'}\_\_$main$\_\_\text{'}$: is used to separate the main code from the functions' code so that each function can be unit tested. Enter statements to be run as the main code under if $\_\_$name$\_\_==\text{'}\_\_$main$\_\_\text{'}$:$.$ Indent the statements so the statements belong to the if block. Refer to the subsection Importing modules and executing scripts under section Module basics for more information about running a program as a script.

Note: Do not remove if $\_\_$name$\_\_==\text{'}\_\_$main$\_\_\text{'}$: from the code. Otherwise, the unit tests will fail even though the program produces the correct output.

This example lab uses multiple unit tests to test the kilo$\_$to$\_$pounds$()$ function.

Complete a program that takes a weight in kilograms as input, converts the weight to pounds, and then outputs the weight in pounds. $1$ kilogram $=2\mathrm{.}204$ pounds $($lbs$).$

The program must define the following function:

def kilo$\_$to$\_$pounds$($kilos$)-$ take kilos as a parameter, convert kilos from kilograms to pounds, and return the weight in pounds.

Ex: If the input of the program is:

$10$

$10$ is passed to kilo$\_$to$\_$pounds$()$ and the output of the program is:

$22\mathrm{.}040$ lbs

The program below has an error in the kilo$\_$to$\_$pounds$()$ function.

Try submitting the program for grading $($click "Submit mode", then "Submit for grading"$).$ Notice that the first two test cases fail, but the third test case passes. The first test case fails because the program outputs the result from the kilo$\_$to$\_$pounds$()$ function, which has an error. The second test case uses a Unit test to test the kilo$\_$to$\_$pounds$()$ function, which fails.

Change the kilo$\_$to$\_$pounds$()$ function to multiply the variable kilos by $2\mathrm{.}204,$ instead of dividing. The return statement should be: return $($kilos $*2\mathrm{.}204).$ Submit again. Now the test cases should all pass.

Note: A common error is to mistype a function name with the incorrect capitalization. Function names are case sensitive$,$ so if a lab program asks for a kilo$\_$to$\_$pounds$()$ function, a kilo$\_$To$\_$Pounds$()$ function that works for you in "Develop mode" will result in a failed unit test. The unit test will not be able to find kilo$\_$to$\_$pounds$().$

def kilo$\_$to$\_$pounds$($kilos$)$:

# This statement intentionally has an error.

return $($kilos $/2\mathrm{.}204)$

# Main part of the program starts here. Do not remove the line below.

if $\_\_$name$\_\_==\text{'}\_\_$main$\_\_\text{'}$:

kilos $=$ float$($input$())$

pounds $=$ kilo$\_$to$\_$pounds$($kilos$)$

print$($f$\text{'}\{$pounds:$\mathrm{.}3$f$\}$ lbs$\text{'})$