Use set literals

Author: nedbat

coverage/collector.py

@@ -55,7 +55,7 @@ class Collector(object):
     _collectors = []
 
     # The concurrency settings we support here.
-    SUPPORTED_CONCURRENCIES = set(["greenlet", "eventlet", "gevent", "thread"])
+    SUPPORTED_CONCURRENCIES = {"greenlet", "eventlet", "gevent", "thread"}
 
     def __init__(
         self, should_trace, check_include, should_start_context, file_mapper,

coverage/html.py

@@ -84,7 +84,7 @@ def __init__(self, cov):
         data = self.coverage.get_data()
         self.has_arcs = data.has_arcs()
         if self.config.show_contexts:
-            if data.measured_contexts() == set([""]):
+            if data.measured_contexts() == {""}:
                 self.coverage._warn("No contexts were measured")
         data.set_query_contexts(self.config.report_contexts)
 

coverage/misc.py

@@ -77,7 +77,7 @@ def new_contract(*args, **kwargs):
     def one_of(argnames):
         """Ensure that only one of the argnames is non-None."""
         def _decorator(func):
-            argnameset = set(name.strip() for name in argnames.split(","))
+            argnameset = {name.strip() for name in argnames.split(",")}
             def _wrapper(*args, **kwargs):
                 vals = [kwargs.get(name) for name in argnameset]
                 assert sum(val is not None for val in vals) == 1

coverage/parser.py

@@ -220,7 +220,7 @@ def first_lines(self, lines):
         Returns a set of the first lines.
 
         """
-        return set(self.first_line(l) for l in lines)
+        return {self.first_line(l) for l in lines}
 
     def translate_lines(self, lines):
         """Implement `FileReporter.translate_lines`."""
@@ -520,7 +520,7 @@ class AstArcAnalyzer(object):
     def __init__(self, text, statements, multiline):
         self.root_node = ast.parse(neuter_encoding_declaration(text))
         # TODO: I think this is happening in too many places.
-        self.statements = set(multiline.get(l, l) for l in statements)
+        self.statements = {multiline.get(l, l) for l in statements}
         self.multiline = multiline
 
         if AST_DUMP:                                # pragma: debugging
@@ -626,10 +626,10 @@ def _line__Module(self, node):
             return 1
 
     # The node types that just flow to the next node with no complications.
-    OK_TO_DEFAULT = set([
+    OK_TO_DEFAULT = {
         "Assign", "Assert", "AugAssign", "Delete", "Exec", "Expr", "Global",
         "Import", "ImportFrom", "Nonlocal", "Pass", "Print",
-    ])
+    }
 
     @contract(returns='ArcStarts')
     def add_arcs(self, node):
@@ -661,7 +661,7 @@ def add_arcs(self, node):
                     print("*** Unhandled: {}".format(node))
 
             # Default for simple statements: one exit from this node.
-            return set([ArcStart(self.line_for_node(node))])
+            return {ArcStart(self.line_for_node(node))}
 
     @one_of("from_start, prev_starts")
     @contract(returns='ArcStarts')
@@ -677,7 +677,7 @@ def add_body_arcs(self, body, from_start=None, prev_starts=None):
 
         """
         if prev_starts is None:
-            prev_starts = set([from_start])
+            prev_starts = {from_start}
         for body_node in body:
             lineno = self.line_for_node(body_node)
             first_line = self.multiline.get(lineno, lineno)
@@ -890,7 +890,7 @@ def _handle_decorated(self, node):
                         self.add_arc(last, lineno)
                         last = lineno
         # The body is handled in collect_arcs.
-        return set([ArcStart(last)])
+        return {ArcStart(last)}
 
     _handle__ClassDef = _handle_decorated
 
@@ -984,7 +984,7 @@ def _handle__Try(self, node):
                 # If there are `except` clauses, then raises in the try body
                 # will already jump to them.  Start this set over for raises in
                 # `except` and `else`.
-                try_block.raise_from = set([])
+                try_block.raise_from = set()
         else:
             self.block_stack.pop()
 
@@ -1079,7 +1079,7 @@ def _combine_finally_starts(self, starts, exits):
             if start.cause is not None:
                 causes.append(start.cause.format(lineno=start.lineno))
         cause = " or ".join(causes)
-        exits = set(ArcStart(xit.lineno, cause) for xit in exits)
+        exits = {ArcStart(xit.lineno, cause) for xit in exits}
         return exits
 
     @contract(returns='ArcStarts')

coverage/phystokens.py

@@ -87,7 +87,7 @@ def source_token_lines(source):
 
     """
 
-    ws_tokens = set([token.INDENT, token.DEDENT, token.NEWLINE, tokenize.NL])
+    ws_tokens = {token.INDENT, token.DEDENT, token.NEWLINE, tokenize.NL}
     line = []
     col = 0
 

coverage/sqldata.py

@@ -784,7 +784,7 @@ def measured_contexts(self):
         """
         self._start_using()
         with self._connect() as con:
-            contexts = set(row[0] for row in con.execute("select distinct(context) from context"))
+            contexts = {row[0] for row in con.execute("select distinct(context) from context")}
         return contexts
 
     def file_tracer(self, filename):
@@ -857,7 +857,7 @@ def lines(self, filename):
             arcs = self.arcs(filename)
             if arcs is not None:
                 all_lines = itertools.chain.from_iterable(arcs)
-                return list(set(l for l in all_lines if l > 0))
+                return list({l for l in all_lines if l > 0})
 
         with self._connect() as con:
             file_id = self._file_id(filename)

tests/plugin1.py

@@ -44,7 +44,7 @@ def line_number_range(self, frame):
 class FileReporter(coverage.FileReporter):
     """Dead-simple FileReporter."""
     def lines(self):
-        return set([105, 106, 107, 205, 206, 207])
+        return {105, 106, 107, 205, 206, 207}
 
 
 def coverage_init(reg, options):        # pylint: disable=unused-argument

tests/test_collector.py

@@ -45,6 +45,6 @@ def otherfunc(x):
         self.start_import_stop(cov, "f2")
 
         # Double-check that our files were checked.
-        abs_files = set(os.path.abspath(f) for f in should_trace_hook.filenames)
+        abs_files = {os.path.abspath(f) for f in should_trace_hook.filenames}
         self.assertIn(os.path.abspath("f1.py"), abs_files)
         self.assertIn(os.path.abspath("f2.py"), abs_files)

tests/test_parser.py

@@ -171,11 +171,11 @@ def meth(self):
             def func(x=25):
                 return 26
             """)
-        raw_statements = set([3, 4, 5, 6, 8, 9, 10, 13, 15, 16, 17, 20, 22, 23, 25, 26])
+        raw_statements = {3, 4, 5, 6, 8, 9, 10, 13, 15, 16, 17, 20, 22, 23, 25, 26}
         if env.PYBEHAVIOR.trace_decorated_def:
             raw_statements.update([11, 19])
         self.assertEqual(parser.raw_statements, raw_statements)
-        self.assertEqual(parser.statements, set([8]))
+        self.assertEqual(parser.statements, {8})
 
     def test_class_decorator_pragmas(self):
         parser = self.parse_source("""\
@@ -188,8 +188,8 @@ class Bar(object):
                 def __init__(self):
                     self.x = 8
             """)
-        self.assertEqual(parser.raw_statements, set([1, 2, 3, 5, 6, 7, 8]))
-        self.assertEqual(parser.statements, set([1, 2, 3]))
+        self.assertEqual(parser.raw_statements, {1, 2, 3, 5, 6, 7, 8})
+        self.assertEqual(parser.statements, {1, 2, 3})
 
     def test_empty_decorated_function(self):
         parser = self.parse_source("""\
@@ -463,7 +463,7 @@ def test_missing_line_ending(self):
             """)
 
         parser = self.parse_file("normal.py")
-        self.assertEqual(parser.statements, set([1]))
+        self.assertEqual(parser.statements, {1})
 
         self.make_file("abrupt.py", """\
             out, err = subprocess.Popen(
@@ -476,4 +476,4 @@ def test_missing_line_ending(self):
             self.assertEqual(f.read()[-1], ")")
 
         parser = self.parse_file("abrupt.py")
-        self.assertEqual(parser.statements, set([1]))
+        self.assertEqual(parser.statements, {1})

tests/test_plugins.py

@@ -400,12 +400,12 @@ def test_plugin2_with_branch(self):
         # have 7 lines in it.  If render() was called with line number 4,
         # then the plugin will claim that lines 4 and 5 were executed.
         analysis = cov._analyze("foo_7.html")
-        self.assertEqual(analysis.statements, set([1, 2, 3, 4, 5, 6, 7]))
+        self.assertEqual(analysis.statements, {1, 2, 3, 4, 5, 6, 7})
         # Plugins don't do branch coverage yet.
         self.assertEqual(analysis.has_arcs(), True)
         self.assertEqual(analysis.arc_possibilities(), [])
 
-        self.assertEqual(analysis.missing, set([1, 2, 3, 6, 7]))
+        self.assertEqual(analysis.missing, {1, 2, 3, 6, 7})
 
     def test_plugin2_with_text_report(self):
         self.make_render_and_caller()
@@ -553,7 +553,7 @@ def line_number_range(self, frame):
 
             class MyReporter(coverage.FileReporter):
                 def lines(self):
-                    return set([99, 999, 9999])
+                    return {99, 999, 9999}
 
             def coverage_init(reg, options):
                 reg.add_file_tracer(Plugin())