Drop unneeded key arguments for sorting dict items

Passing a key argument of the form `key=lambda item: item[0]` to
sorted() when sorting dict items is unneeded, because tuples already
compare element-wise, and the first elements are known to be unique
since they are dictionary keys.

Author: living180

debug_toolbar/panels/settings.py

@@ -20,6 +20,4 @@ def title(self):
         return _("Settings from %s") % settings.SETTINGS_MODULE
 
     def generate_stats(self, request, response):
-        self.record_stats(
-            {"settings": dict(sorted(get_safe_settings().items(), key=lambda s: s[0]))}
-        )
+        self.record_stats({"settings": dict(sorted(get_safe_settings().items()))})

debug_toolbar/panels/signals.py

@@ -76,7 +76,7 @@ def signals(self):
 
     def generate_stats(self, request, response):
         signals = []
-        for name, signal in sorted(self.signals.items(), key=lambda x: x[0]):
+        for name, signal in sorted(self.signals.items()):
             receivers = []
             for receiver in signal.receivers:
                 receiver = receiver[1]