a basic tkinter attempt that uses enter to handle the input

tkinter-enter.py

@@ -0,0 +1,108 @@
+# From: https://www.geeksforgeeks.org/how-to-bind-the-enter-key-to-a-tkinter-window/
+
+# importing tkinter
+
+import tkinter as tk
+from generic import sanitize, type_hosts_listed, type_hosts_organized, ip_lookup, domain_lookup, spf_dmarc
+
+# function to run on pressing
+# 'ENTER' key from keyboard.
+def key_handler_function(event):
+    inputs = entry.get()
+    sanitized = sanitize.strip_and_list(inputs)
+    typed = type_hosts_listed.type_hosts(sanitized)
+    textbox.insert('end', typed)
+    listed = type_hosts_organized.type_hosts(sanitized)
+    # IPs = listed['IPs']
+    # below works for updating a global variable (here)...
+    var.set(listed['IPs'])
+    ip_listbox.delete(0, 'end')
+    domain_listbox.delete(0, 'end')
+    url_listbox.delete(0, 'end')
+    email_listbox.delete(0, 'end')
+
+    for IP in listed['IPs']:
+        hostname = ip_lookup.get_hostname(IP)
+        output = "{} => {}".format(IP, hostname[0])
+        ip_listbox.insert('end', output)
+    for domain in listed['domains']:
+        ip = domain_lookup.get_ip_address(domain)
+        output = "{} => {}".format(domain, ip)
+        domain_listbox.insert('end', output)
+    for URL in listed['URLs']:
+        url_listbox.insert('end', URL)
+    for email in listed['emails']:
+        dmarc, spf = spf_dmarc.lookup(email)
+        output_dmarc = "{} => {}".format(email, dmarc)
+        output_spf = "{} => {}".format(email, spf)
+        email_listbox.insert('end', output_dmarc, output_spf)
+
+
+def test_button_function():
+    # testing quoting and comma separating hosts, IPs for now, from global StringVar var
+    textbox.delete(1.0, 'end')
+    IPs = ', '.join([f'"{host}"' for host in var.get()])
+    textbox.insert('end', IPs)
+    print("var is : {}".format(var.get()))
+    # ... and printing an updated global variable here!
+
+# main application window
+root = tk.Tk()
+root.title("Enter IP addresses, URLs, domains, email addresses")
+root.geometry("900x600")
+root.resizable(0,0)
+
+# configure the grid
+root.columnconfigure(0, weight=1)
+root.columnconfigure(1, weight=1)
+root.columnconfigure(2, weight=1)
+root.columnconfigure(3, weight=1)
+
+#Listing stuff
+# Gotta try out: https://www.pythontutorial.net/tkinter/tkinter-listbox/
+
+# creating widgets
+# try to use grid instead of pack: https://www.geeksforgeeks.org/python-grid-method-in-tkinter/
+entry = tk.Entry(root, text="Put in IP addresses, URLs, domains, email addresses")
+textbox = tk.Text(root, height=8)
+# textbox.insert('1.0', test)
+entrylabel = tk.Label(root, text="Copy-paste or type and Enter :D")
+ip_label = tk.Label(root, text="IP and hostname")
+ip_listbox = tk.Listbox(root)
+domain_label = tk.Label(root, text="domain => IP")
+domain_listbox = tk.Listbox(root)
+url_label = tk.Label(root, text="URL => IP")
+url_listbox = tk.Listbox(root)
+email_label = tk.Label(root, text="email address => DMARC/SPF") 
+email_listbox = tk.Listbox(root)
+var =  tk.Variable()
+entrylabel.grid(column=1, row=0, columnspan=2, sticky='nsew')
+entry.grid(column=0, row=1, columnspan=4, sticky='nsew') 
+ip_label.grid(column=0, row=2, columnspan=2, sticky='nsew')
+ip_listbox.grid(column=0, row=3, columnspan=2, sticky='nsew')
+domain_label.grid(column=2, row=2, columnspan=2, sticky='nsew')
+domain_listbox.grid(column=2, row=3, columnspan=2, sticky='nsew')
+url_label.grid(column=0, row=4, columnspan=2, sticky='nsew')
+url_listbox.grid(column=0, row=5, columnspan=2, sticky='nsew')
+email_label.grid(column=2, row=4, columnspan=2, sticky='nsew')
+email_listbox.grid(column=2, row=5, columnspan=2, sticky='nsew')
+
+# label.grid(column=1, row=2)
+# textbox.grid(column=1, row=3)
+
+#Trying out buttons
+# Try to create a copy-paste button: https://www.delftstack.com/howto/python/python-copy-to-clipboard/#copy-text-to-clipboard-in-python-using-the-tkinter-module
+test_button = tk.Button(root, text="comma-separate and add quotes", command=test_button_function)
+# test_button.grid(column=2, row=5, columnspan=2)
+
+
+# Binding ENTER key to function
+entry.bind("<Return>", key_handler_function)
+
+# run the application
+root.mainloop()
+
+# Instead of a label showing the output, use a text box: https://pythonguides.com/python-tkinter-text-box/ -> DONE
+# Implement a copy paste button: https://stackoverflow.com/a/71357987
+# Try out ways to sanitize input, f.e. extract email addresses like in Cyberchef: https://github.com/gchq/CyberChef/blob/master/src/core/operations/ExtractEmailAddresses.mjs
+# Another simpler way would be to first account for special characters, which are not allowed in email addresses: https://stackoverflow.com/questions/2049502/what-characters-are-allowed-in-an-email-address