Setup tool to configurate static IP Address on RaspberryPi

ip_config.py

import re

# variables
static_ip = ""
static_netmask = ""
static_gateway = ""

# Network configuration path
config_path = "/etc/dhcpcd.conf"
interfaces_path = "/etc/network/interfaces"

# Enable static or dynamic IP-address
print("Welcome to RaspberryPi network interface setup.")
ip_input = input("Is a static IP-address required? (Y/n): ")

if ip_input.lower() == 'yes' or ip_input.lower() == 'y':
    # Passing static IP
    while True:
        static_ip = str(input("Enter preferred static IP Address (e.g. 192.168.1.xxx): "))
        # Passing just if the re.match condition is fulfilled and required information is provided in the correct form
        # if not the question is looped...
        if not re.match(r"\d\d\d[.]\d\d\d[.]\d[.]\d\d\d", static_ip):
            print("The provided IP-Address is not correct, please enter valid IP-Address.")
        else:
            print(f"Provided IP Address is: {static_ip}")
            break
    # Passing Gateway (Router IP Address)
    while True:
        static_gateway = str(input("Enter the corresponding gateway (e.g. 192.168.1.254  for Life QRO): "))
        # Passing just if the re.match condition is fulfilled and required information is provided in the correct form
        # if not the question is looped...
        if not re.match(r"\d\d\d[.]\d\d\d[.]\d[.]\d\d\d", static_gateway):
            print("The provided netmask is not correct, please enter valid gateway.")
        else:
            print(f"Provided IP Address is: {static_gateway}")
            break
    # Writing static IP information to RaspberryPi
    with open(config_path, 'a') as settings:
        settings.write("interface eth0\n"
                       f"static ip_address={static_ip}/24\n"
                       f"    static_routers={static_gateway}\n"
                       f"    static_domain_name_servers={static_gateway} 208.67.222.222\n"
                       "\n"
                       "allow-hotplug eth0\n"
                       "iface eth0 inet static\n"
                       )
    with open(interfaces_path, "w") as settings:
        settings.write(
                        "# interfaces(5) file used by ifup(8) and ifdown(8)\n"
                        "# Please note that this file is written to be used with dhcpcd\n"
                        "# For static IP, consult /etc/dhcpcd.conf and 'man dhcpcd.conf'\n"
                        "\n"
                        "# Include files from /etc/network/interfaces.d:\n"
                        "source-directory /etc/network/interfaces.d\n"
                        "\n"
                        "auto lo\n"
                        "iface lo inet loopback\n"
                        "\n"
                        "iface eth0 inet manual\n"
                        "\n"
                        "allow-hotplug wlan0\n"
                        "iface wlan0 inet manual\n"
                        "wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf\n"
                        "\n"
                        "allow-hotplug wlan1\n"
                        "iface wlan1 inet manual\n"
                        "wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf\n"
        )


elif ip_input.lower() == 'no' or ip_input.lower() == 'n':
    # Writing dynamic IP information to RaspberryPi
    with open(config_path, 'a') as settings:
        settings.write("auto lo\n"
                       "iface lo inet loopback\n"
                       "iface eth0 inet manual\n"
                       "    auto eth0\n"
                       "    iface eth0 inet dhcp\n"
                       "THIS SHOULD HAVE WORKED\n"
                       )


else:
    print("No valid input")

print("Setup completed. \n")
# ("Following commands must be executed:\n"
#       "sudo service dhcpcd stop\n"
#       "sudo systemctl disable dhcpcd"
#       "Recommended reboot command: sudo service networking restart")

# # Install VNC Server connection
# os.system("sudo apt install realvnc-vnc-server realvnc-vnc-viewer")