IT 116: Intermediate Scripting

IT 116: Introduction to Scripting
Homework 6

Due
What You Need to Do
Setup On Your Machine
Specification
Functions
Test Code
Output
Suggestions
Testing on Your Machine
Copy the Script to Unix
Testing the Script on Unix (Optional)

Due

Sunday, March 3rd at 11:59 PM

What You Need to Do

Create the script hw6.py
Make sure it obeys the rules in Rules for Homework Scripts
Move it to an an hw6 directory on pe15.cs.umb.edu

Setup On Your Machine

Open a text editor.
I would suggest the text editor built into the program IDLE.
Save the file as hw6.py

Specification

This script prints a table of Kilometers temperatures and their equivalent Miles values
Kilometers can be converted to Miles using the formula
```
miles = km / 1.609344
```
The table will run between a minimum and maximum value entered by the user
The miles values must be converted to integers
The script must ask the user for maximum and minimum kilometer values
It should then print a blank line
The labels "Kilometers" and "Miles" should appear at the top of the table
Under these labels should be a line of dashes
Then it prints a table of kilometers and their equivalent miles values
The miles values should line up with the "Miles" label
In other words, the script will work exactly like hw5.py
But it will do this using functions
The script must contain 3 functions
- print_table
- print_header
- print_line

Functions

print_table

Header
```
def print_table(min, max):
```
This function will will print the conversion table
It will call print_header to print the labels at the top of the table
It will use a for loop to call print_line which will print each line of the table
It will be called by the test code you will find below

print_header

Header
```
def print_header():
```
This function should print the labels "Kilometers" and "Miles"
It should then print a line of dashes

print_line

Header
```
def print_line(km):
```
This function will print one line of the conversion table
It will convert the Kilometers value into Miles
Then it will print the Kilometers and Miles values
See the output below

Test Code

Your script must contain the following statements

min = int(input("Minimum: "))
max = int(input("Maximum: "))
print()
print_table(min, max)

They should appear at the bottom of your script

Output

The output should look something like this

Minimum: 1
Maximum: 10

Kilometers      Miles
---------------------
1               1
2               1
3               2
4               2
5               3
6               4
7               4
8               5
9               6
10              6

The text in blue is what the user enters

Suggestions

Write this script in stages
Test your script at each step
Print the steps below
And check them off as you finish each one

Copy only the function headers for the three functions listed above into your script file.
Under each header, write pass.
pass is a special Python statement that does nothing.
You use it in situations like this.
Make sure each pass statement is indented.
Run the script.
Fix any errors you find.
Remove the pass statement from print_table.
Print the parameters min and max.
Copy the test code above to the bottom of your script.
Run the script.
Fix any errors you find.
Replace the print statement in print_table with a call to print_header.
Remove the pass statement from print_header.
Add a print statement for the labels at the top of the table.
You will need to put a Tab character between the two words so everything will line up.
You do this with an escape sequence.
Add another print statement for the line of dashes.
Run the script.
After the input prompts you should see
```
Kilometers	Miles
-------------------
```
Fix any errors you find.
In print_table add a for loop using the loop variable km and the range function.
Range should produce all the values between min and max.
Think carefully when choosing the arguments for range. Inside the loop print the value of km.
Run the script.
Fix any errors you find.
In print_table replace the print statement inside the for loop with a call to print_line.
Inside print_line remove the pass statement.
Replace it with a statement that prints the value of the parameter km.
Run the script.
The output should be the same as above but now it comes from print_line.
Fix any errors you find.
Remove the print statement from print_line.
In it's place you need to write an assignment statement that sets the value of the local variable miles.
Use the same formula you used in homework 5 to get the value for miles.
Print the values of both km and miles.
Run the script.
Fix any errors you find.
Change the print statement in print_line so it prints a single string with a Tab character between km and miles.
You will have to use the conversion function str to change both variables to a string.
The values should line up with the labels for each column.
Run the script.
Fix any errors you find.

Testing on Your Machine

Open IDLE
Use the Open command in IDLE to open hw6.py
Run your script inside IDLE

Your output should look something like this

Minimum: 1
Maximum: 10

Kilometers      Miles
---------------------
1               1
2               1
3               2
4               2
5               3
6               4
7               4
8               5
9               6
10              6

The text in blue is what you enter at the command line

Copy the Script to Unix

Open FileZilla and connect to pe15.cs.umb.edu
Go to your it116 directory
Go to your hw directory
Right-click in the whitespace inside the hw directory
Enter hw6 in the dialog box
Click and drag your script from the bottom left panel to the bottom right panel

Testing the Script on Unix (Optional)

Connect to pe15.cs.umb.edu using an ssh client like putty.exe (Windows) or ssh (Mac)
Go to the directory for this exercise
```
cd  it116/hw/hw6
```
Run this script
```
python3 hw6.py
```

You should see something like this

Minimum: 1
Maximum: 10

Kilometers      Miles
---------------------
1               1
2               1
3               2
4               2
5               3
6               4
7               4
8               5
9               6
10              6

The text in blue is what you enter at the command line