diff --git a/Doc/howto/logging-cookbook.rst b/Doc/howto/logging-cookbook.rst
--- a/Doc/howto/logging-cookbook.rst
+++ b/Doc/howto/logging-cookbook.rst
@@ -1680,7 +1680,7 @@
 
     def main():
         logging.basicConfig(level=logging.INFO, format='%(message)s')
-        logging.info(_('message 1', set_value=set([1, 2, 3]), snowman='\u2603'))
+        logging.info(_('message 1', set_value={1, 2, 3}, snowman='\u2603'))
 
     if __name__ == '__main__':
         main()
diff --git a/Doc/library/pickle.rst b/Doc/library/pickle.rst
--- a/Doc/library/pickle.rst
+++ b/Doc/library/pickle.rst
@@ -859,7 +859,7 @@
    data = {
        'a': [1, 2.0, 3, 4+6j],
        'b': ("character string", b"byte string"),
-       'c': set([None, True, False])
+       'c': {None, True, False}
    }
 
    with open('data.pickle', 'wb') as f:
diff --git a/Lib/_strptime.py b/Lib/_strptime.py
--- a/Lib/_strptime.py
+++ b/Lib/_strptime.py
@@ -167,9 +167,9 @@
             time.tzset()
         except AttributeError:
             pass
-        no_saving = frozenset(["utc", "gmt", time.tzname[0].lower()])
+        no_saving = frozenset({"utc", "gmt", time.tzname[0].lower()})
         if time.daylight:
-            has_saving = frozenset([time.tzname[1].lower()])
+            has_saving = frozenset({time.tzname[1].lower()})
         else:
             has_saving = frozenset()
         self.timezone = (no_saving, has_saving)
diff --git a/Lib/asyncore.py b/Lib/asyncore.py
--- a/Lib/asyncore.py
+++ b/Lib/asyncore.py
@@ -220,7 +220,7 @@
     connecting = False
     closing = False
     addr = None
-    ignore_log_types = frozenset(['warning'])
+    ignore_log_types = frozenset({'warning'})
 
     def __init__(self, sock=None, map=None):
         if map is None:
diff --git a/Lib/sre_compile.py b/Lib/sre_compile.py
--- a/Lib/sre_compile.py
+++ b/Lib/sre_compile.py
@@ -22,10 +22,10 @@
 else:
     MAXCODE = 0xFFFFFFFF
 
-_LITERAL_CODES = set([LITERAL, NOT_LITERAL])
-_REPEATING_CODES = set([REPEAT, MIN_REPEAT, MAX_REPEAT])
-_SUCCESS_CODES = set([SUCCESS, FAILURE])
-_ASSERT_CODES = set([ASSERT, ASSERT_NOT])
+_LITERAL_CODES = {LITERAL, NOT_LITERAL}
+_REPEATING_CODES = {REPEAT, MIN_REPEAT, MAX_REPEAT}
+_SUCCESS_CODES = {SUCCESS, FAILURE}
+_ASSERT_CODES = {ASSERT, ASSERT_NOT}
 
 def _compile(code, pattern, flags):
     # internal: compile a (sub)pattern
diff --git a/Lib/statistics.py b/Lib/statistics.py
--- a/Lib/statistics.py
+++ b/Lib/statistics.py
@@ -150,7 +150,7 @@
     # We fail as soon as we reach a value that is not an int or the type of
     # the first value which is not an int. E.g. _sum([int, int, float, int])
     # is okay, but sum([int, int, float, Fraction]) is not.
-    allowed_types = set([int, type(start)])
+    allowed_types = {int, type(start)}
     n, d = _exact_ratio(start)
     partials = {d: n}  # map {denominator: sum of numerators}
     # Micro-optimizations.
@@ -168,7 +168,7 @@
         assert allowed_types.pop() is int
         T = int
     else:
-        T = (allowed_types - set([int])).pop()
+        T = (allowed_types - {int}).pop()
     if None in partials:
         assert issubclass(T, (float, Decimal))
         assert not math.isfinite(partials[None])