max menu items = 9999; this isn't really supposed to give you the entire database

.gitignore

@@ -2,3 +2,4 @@
 __pycache__/
 .idea/
 *.lock
+*.iml

config.py

@@ -15,3 +15,7 @@ def player():
 def options():
     return config.get('DEFAULT', 'player.options')
 
+
+def maxitems():
+    return int(config.get('DEFAULT', 'menu_items.max'))
+

radiomenu.py

@@ -1,7 +1,7 @@
 from python_console_menu import AbstractMenu, MenuItem
 import subprocess
 
-from config import player, options
+from config import player, options, maxitems
 
 
 class RadioMenu(AbstractMenu):
@@ -11,16 +11,19 @@ class RadioMenu(AbstractMenu):
             station_list = []
 
         for i in range(len(station_list)):
-            self.add_menu_item(
-                MenuItem(
-                    i,
-                    station_list[i]["name"] + " " +
-                    station_list[i]["codec"] + " " +
-                    station_list[i]["bitrate"] + " " +
-                    station_list[i]["url"],
-                    lambda url=station_list[i]["url"]: subprocess.run([player(), options(), url])
+            if i < maxitems():  # The last item is the exit option, so not "<=".
+                self.add_menu_item(
+                    MenuItem(
+                        i,
+                        station_list[i]["name"] + " " +
+                        station_list[i]["codec"] + " " +
+                        station_list[i]["bitrate"] + " " +
+                        station_list[i]["url"],
+                        lambda url=station_list[i]["url"]: subprocess.run([player(), options(), url])
+                    )
                 )
-            )
+            else:
+                break
 
     def initialise(self):
-        self.add_menu_item(MenuItem(9999, "Exit menu").set_as_exit_option())
+        self.add_menu_item(MenuItem(maxitems(), "Exit menu").set_as_exit_option())

radiostations.ini

@@ -2,4 +2,4 @@
 radio_browser.api=all.api.radio-browser.info
 player.command=mpv
 player.options=--no-video
-
+menu_items.max=9999