minor improvements to Python code.

README.md

@@ -1,3 +1,11 @@
 # Framework-System-Details
 
 Go to Activities, search for Framework System Details, launch the application. This will tell you the BIOS version your using, your CPU version (11th or 12th Gen), and of course your kernel version on Ubuntu 22.04.
+
+Running
+
+    sudo python3 bios-checker.py
+
+will show the following window.
+
+![screenshot](screenshot.png)

bios-checker.py

@@ -1,26 +1,43 @@
-import subprocess
-import gi
+"""Show system details such as BIOS version, CPU version and kernel version."""
 
-gi.require_version('Gtk', '3.0')
-from gi.repository import Gtk, Pango
+from subprocess import check_output
+from gi import require_version
+require_version('Gtk', '3.0')
+from gi.repository import Gtk  # nopep8 # noqa: E402 # pylint: disable=C0413
 
-# Set locale to US English so output matches the expected strings
+# Set locale to US English so output matches the expected strings.
 env = {"LC_ALL": "en_US.utf8"}
 
-# Function to run a command with pkexec
-def run_with_pkexec(cmd):
-    return subprocess.check_output(['pkexec', 'sh', '-c', cmd], env=env)
 
-# Run the commands and store their output in variables
+def run_with_pkexec(cmd: str) -> bytes:
+    """Run a command with pkexec.
+
+    :param cmd: The command to run.
+    :return: The output of the command.
+    """
+    return check_output(['pkexec', 'sh', '-c', cmd], env=env)
+
+
+# Run the commands and store their output in variables.
 bios_info = run_with_pkexec("dmidecode | grep -A3 'Vendor:'")
-cpu_info = subprocess.check_output("lshw -C cpu | grep -A3 'product:'", shell=True, env=env)
-kernel_version = subprocess.check_output("uname -r", shell=True, env=env)
+cpu_info = check_output("lshw -C cpu | grep -A3 'product:'", shell=True,
+                        env=env)
+kernel_version = check_output("uname -r", shell=True, env=env)
 
-# Create a GTK dialog window with larger text and a bigger size
-dialog = Gtk.MessageDialog(parent=None, flags=0, message_type=Gtk.MessageType.INFO, buttons=Gtk.ButtonsType.OK, text="Framework System Details")
-dialog.set_markup("<span size='xx-large' weight='bold'>BIOS Information:</span>\n{}\n<span size='xx-large' weight='bold'>CPU Information:</span>\n{}\n<span size='xx-large' weight='bold'>Kernel Version:</span> {}".format(bios_info.decode(), cpu_info.decode(), kernel_version.decode()))
+# Create a GTK dialog window with larger text and a bigger size.
+dialog = Gtk.MessageDialog(parent=None, flags=0,
+                           message_type=Gtk.MessageType.INFO,
+                           buttons=Gtk.ButtonsType.OK,
+                           text="Framework System Details")
+markup = f"""<span size='xx-large' weight='bold'>BIOS Information:</span>
+{bios_info.decode()}
+<span size='xx-large' weight='bold'>CPU Information:</span>
+{cpu_info.decode()}
+<span size='xx-large' weight='bold'>Kernel Version:</span>
+       {kernel_version.decode()}"""
+print(markup)
+dialog.set_markup(markup)
 dialog.format_secondary_markup(None)
 dialog.set_size_request(600, 400)
 dialog.run()
 dialog.destroy()
-