Use set literals

6 files changed, 15 insertions, 15 deletions

diff --git a/coverage/collector.py b/coverage/collector.py
index 9333d66a..a4f1790d 100644
--- a/coverage/collector.py
+++ b/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,
diff --git a/coverage/html.py b/coverage/html.py
index 247d2ae1..ef50b56b 100644
--- a/coverage/html.py
+++ b/coverage/html.py
@@ -84,7 +84,7 @@ class HtmlDataGeneration(object):
         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)
 
diff --git a/coverage/misc.py b/coverage/misc.py
index 5c4381ab..96573f7a 100644
--- a/coverage/misc.py
+++ b/coverage/misc.py
@@ -77,7 +77,7 @@ if USE_CONTRACTS:
     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
diff --git a/coverage/parser.py b/coverage/parser.py
index e3e43149..f5a8ddd9 100644
--- a/coverage/parser.py
+++ b/coverage/parser.py
@@ -220,7 +220,7 @@ class PythonParser(object):
         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 @@ class AstArcAnalyzer(object):
             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 @@ class AstArcAnalyzer(object):
                     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 @@ class AstArcAnalyzer(object):
 
         """
         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 @@ class AstArcAnalyzer(object):
                         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 @@ class AstArcAnalyzer(object):
                 # 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 @@ class AstArcAnalyzer(object):
             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')
diff --git a/coverage/phystokens.py b/coverage/phystokens.py
index b6866e7d..54378b3b 100644
--- a/coverage/phystokens.py
+++ b/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
 
diff --git a/coverage/sqldata.py b/coverage/sqldata.py
index 7a3b5c79..b28b83b4 100644
--- a/coverage/sqldata.py
+++ b/coverage/sqldata.py
@@ -784,7 +784,7 @@ class CoverageData(SimpleReprMixin):
         """
         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 @@ class CoverageData(SimpleReprMixin):
             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)