IPP-DEV-02-003: Simple Formatted Strings

[labbenchstudios]

Description

• Using instructions from the in-class lecture, create a module to test some simple formatted string operations.

Review the README

• Please see README.md for further information on, and use of, this content.
• License for embedded documentation and source codes: IPP-DOC-LIC

Estimated effort may vary greatly

• The estimated level of effort for this exercise shown in the 'Estimate' section below is a very rough approximation. The actual level of effort may vary greatly depending on your development and test environment, experience with the requisite technologies, and many other factors.

Actions

Step 1: Make Sure Your System is Setup for Python and This Course

• See IPP-CFG-01-001

Step 2: REMINDER: Make Sure PYTHONPATH is Set Correctly

Whether running Python tests within your IDE or from the command line, you must set the PYTHONPATH environment variable in every execution environment (e.g., every terminal you launch) when attempting to run any of your scripts and their tests or the IPP test app from the command line. The IPP source and test paths will be as follows:

• {your IPP source code path}
• {your IPP source code path}/tests

See IPP-DEV-01-001 for details.

Step 3: Create your own module to test simple numeric calculations

• Using your IDE, or from within a terminal, create a new Python file - a module - named SimpleFormattedStrings.py within the labmodule02 path (or package)
• Open the module, and create the indicated test cases:

Test 1 (string append)

• Create a comment at the beginning of the file:
  • For example:
  • # Test 1: String append test
• Declare the salutation variable as a string. Set the value to "Hello, World!"
• Declare the new_salutation variable as a string. Its value will be salutation plus the string, " Good to meet you."
• Print the new_salutation string.
• Print the new_salutation string's length on a separate line.
  • E.g., print("New Salutation Length: ", len(new_salutation))

Test 2 (string multiplication)

• Within the same module, add a blank newline after the previous test, and create another comment:
  • For example:
  • # Test 2: String multiplication test
• Declare the lots_of_apples variable as a string. Set its value to "apples " and multiply by an integer (2 to 5 - your choice)
• Print the variable lots_of_apples

Test 3 (string formatting)

• Within the same module, add a blank newline after the previous test, and create another comment:
  • For example:
  • # Test 3: String formatting test
• Declare the selling_apples variable as a formatted string (f-string). Here's the syntax:
  • selling_apples = "{0} {1} {2}".format("i'm selling", lots_of_apples, "!")
• Print the selling_apples string
• Now, print on a new line the selling_apples string, but call the capitalize() function on the string. See if you can do this on your own.

Test 4 (string formatting w/ args)

• Within the same module, add a blank newline after the previous test, and create another comment:
  • For example:
  • # Test 4: String formatting with arguments test
• Declare the school_info variable as a formatted string (f-string). Here's the syntax:
  • school_info = "Location: {school}, {city}".format(school = "SCHOOL", city = "CITY")
  • NOTE: Replace SCHOOL and CITY with your choice of school and city.
• Print the school_info string
• Append a state name to school_info. Be sure to format it properly.

Estimate

• Small

Tests

• From within your IDE

  • Right click on your newly created module SimpleFormattedStrings.py and click your IDE's run icon
  • You should see output similar to that discussed in class

• From the command line

  • Open a terminal and cd to your IPP_HOME path
  • Start your virtual environment (if not already running)
  • Be sure your PYTHONPATH is set correctly
  • Run the module
    • python ./labmodule02/SimpleFormattedStrings.py
  • You should see output similar to that discussed in class

Sample output (yours may differ slightly)

Hello, World! Good to meet you.
New Salutation Length:  31
apples apples apples 
i'm selling apples apples apples  !
I'm selling apples apples apples  !
Location: Northeastern, Boston
Location: Northeastern, Boston, MA