Replaced newer python string manipulation expressions with regex

Splitted code in functions
Simplified some parts with shorter statements
Minor corrections to make the program compatible with python >=3.0

.gitignore

@@ -157,4 +157,6 @@ cython_debug/
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
+#.idea/
+
+.vscode/

README.md

@@ -6,6 +6,8 @@ Ufw terminal frontend based on dialog
 # 
 ## Installation
 Tufw **NEEDS** to be installed as root, because it needs to run as root and python won't load the module if it's installed as a normal user.
+
+Tufw requires python3.0 or newer.
 ```sh
 sudo python3 -m pip install tufw
 # OR
@@ -15,7 +17,7 @@ Obviously Tufw needs [`dialog`](https://invisible-island.net/dialog/), so instal
 ```sh
 sudo apt install dialog
 ```
-or what you use on your distribution.
+or whatever you use on your distribution.
 # 
 ## Running
 As ufw, Tufw needs to be run as root.

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = tufw
-version = 1.0.1
+version = 1.1.0
 author = Alessandro Campolo
 author_email = [email protected]
 description = Ufw terminal frontend based on dialog
@@ -18,6 +18,7 @@ classifiers =
 package_dir =
     = src
 packages = find:
+python_requires = >= 3.0
 install_requires =
     pythondialog