From 9ad28915e76887cd55d64e977e603d058a85ba3a Mon Sep 17 00:00:00 2001
From: Ben Ward <ben.ward@softiron.com>
Date: Mon, 13 May 2024 14:44:53 -0500
Subject: [PATCH 1/2] revise structure and add notes file

---
 lesson-2/lesson-2.py | 5 +++++
 lesson-2/notes_2.txt | 2 ++
 2 files changed, 7 insertions(+)
 create mode 100644 lesson-2/lesson-2.py
 create mode 100644 lesson-2/notes_2.txt

diff --git a/lesson-2/lesson-2.py b/lesson-2/lesson-2.py
new file mode 100644
index 0000000..8545b51
--- /dev/null
+++ b/lesson-2/lesson-2.py
@@ -0,0 +1,5 @@
+import argparse
+parser = argparse.ArgumentParser()
+parser.add_argument("echo")
+args = parser.parse_args()
+print(args.echo)
diff --git a/lesson-2/notes_2.txt b/lesson-2/notes_2.txt
new file mode 100644
index 0000000..0ce1c01
--- /dev/null
+++ b/lesson-2/notes_2.txt
@@ -0,0 +1,2 @@
+# argparse tutorial
+

From 17e3bf4997b28650092d2ab5280c36bdce8e4077 Mon Sep 17 00:00:00 2001
From: Ben Ward <ben.ward@softiron.com>
Date: Mon, 20 May 2024 12:57:23 -0500
Subject: [PATCH 2/2] lesson in progress

---
 lesson-2/lesson-2.py  |  6 +-----
 lesson-2/notes_2.txt  | 22 ++++++++++++++++++++++
 lesson-2/test-prog.py | 10 ++++++++++
 3 files changed, 33 insertions(+), 5 deletions(-)
 create mode 100644 lesson-2/test-prog.py

diff --git a/lesson-2/lesson-2.py b/lesson-2/lesson-2.py
index 8545b51..8b13789 100644
--- a/lesson-2/lesson-2.py
+++ b/lesson-2/lesson-2.py
@@ -1,5 +1 @@
-import argparse
-parser = argparse.ArgumentParser()
-parser.add_argument("echo")
-args = parser.parse_args()
-print(args.echo)
+
diff --git a/lesson-2/notes_2.txt b/lesson-2/notes_2.txt
index 0ce1c01..6c92619 100644
--- a/lesson-2/notes_2.txt
+++ b/lesson-2/notes_2.txt
@@ -1,2 +1,24 @@
 # argparse tutorial
 
+- there are two modules that fulfill the same task, `getopt` (an equivalent for `getop()` from the C lang)
+and the deprecated `optparse`.
+
+importing argparse and having no options will do nothing, but a simple help message is auto generated
+
+positional arguments
+
+`add_argument()` method, specifies which command-line options the program is willing to accept
+`parse_args()` method returns data from the options specified
+
+argparse will treat options as strings, unless told otherwise; for instance, `type=int`
+
+optional arguments, are not necessary to run the program without errors
+
+since it's optional, it is given the value of `None`, and will need to be given a new value to fulfill the
+argument requirements
+
+you can make the optional argument more of a flag for true/false by providing a stored value when the command/flag
+is called, i.e. parser.add_argument("--verbose", help="increase output verbosity", action="store_true")
+
+the options can be shortened for ease of use, 
+e.g. parser.add_argument("-v", "--verbose", help="increase output verbosity",action="store_true")
\ No newline at end of file
diff --git a/lesson-2/test-prog.py b/lesson-2/test-prog.py
new file mode 100644
index 0000000..816069f
--- /dev/null
+++ b/lesson-2/test-prog.py
@@ -0,0 +1,10 @@
+import argparse
+parser = argparse.ArgumentParser()
+parser.add_argument("square", type=int, help="display a square of a given number")
+parser.add_argument("-v", "--verbose", help="increase output verbosity", action="store_true")
+args = parser.parse_args()
+answer = args.square**2
+if args.verbose:
+    print(f"the square of {args.square} equals {answer}")
+else:
+    print(answer)
\ No newline at end of file