chore: enhance readme

Author: nooobcoder

README.md

@@ -15,10 +15,31 @@
 #### Instructions for run
 
 1. Clone the **github repo** by `git clone https://github.com/nooobcoder/PythonPingTelnetStatus.git`
+
 2. Check if **Python2** is installed
-   `python --version`
+
+`python --version`
+
 3. Run the script using: `python python2port.py`
 
 _After the script has run, check the newly created **output** folder where the resultant files are output_
 
 ---
+
+## Running the script with arguments
+
+#### Inputs:
+
+-   `-f, --file`: The file name to read from.
+
+-   `-pc, --packet_counts`: The number of packets.
+
+-   `-tr, --telnet_retries`: The number of telnet retries.
+
+#### Example Usage:
+
+```bash
+python python2port.py  -f  input.csv  -pc  4  -tr  4
+```
+
+---

python2port.py

@@ -32,6 +32,15 @@
 
 
 def read_cmd_args():
+    """
+        Read command line arguments
+        Inputs:
+            -f, --file: File name to read from
+            -pc, --packet_counts: Number of packets
+            -tr, --telnet_retries: Telnet retries
+        Returns:
+            args: Command line arguments
+    """
     # Read command line arguments with python2
     parser = argparse.ArgumentParser()
     parser.add_argument("-f", "--file", help="File name to read from")