summaryrefslogtreecommitdiff
path: root/venv/Lib/site-packages/pylint/checkers/newstyle.py
diff options
context:
space:
mode:
Diffstat (limited to 'venv/Lib/site-packages/pylint/checkers/newstyle.py')
-rw-r--r--venv/Lib/site-packages/pylint/checkers/newstyle.py127
1 files changed, 127 insertions, 0 deletions
diff --git a/venv/Lib/site-packages/pylint/checkers/newstyle.py b/venv/Lib/site-packages/pylint/checkers/newstyle.py
new file mode 100644
index 0000000..46f4e4e
--- /dev/null
+++ b/venv/Lib/site-packages/pylint/checkers/newstyle.py
@@ -0,0 +1,127 @@
+# Copyright (c) 2006, 2008-2011, 2013-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
+# Copyright (c) 2012-2014 Google, Inc.
+# Copyright (c) 2013-2018 Claudiu Popa <pcmanticore@gmail.com>
+# Copyright (c) 2014 Michal Nowikowski <godfryd@gmail.com>
+# Copyright (c) 2014 Brett Cannon <brett@python.org>
+# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
+# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
+# Copyright (c) 2016 Alexander Todorov <atodorov@otb.bg>
+# Copyright (c) 2016 Jakub Wilk <jwilk@jwilk.net>
+
+# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+# For details: https://github.com/PyCQA/pylint/blob/master/COPYING
+
+"""check for new / old style related problems
+"""
+import astroid
+
+from pylint.checkers import BaseChecker
+from pylint.checkers.utils import check_messages, has_known_bases, node_frame_class
+from pylint.interfaces import IAstroidChecker
+
+MSGS = {
+ "E1003": (
+ "Bad first argument %r given to super()",
+ "bad-super-call",
+ "Used when another argument than the current class is given as "
+ "first argument of the super builtin.",
+ )
+}
+
+
+class NewStyleConflictChecker(BaseChecker):
+ """checks for usage of new style capabilities on old style classes and
+ other new/old styles conflicts problems
+ * use of property, __slots__, super
+ * "super" usage
+ """
+
+ __implements__ = (IAstroidChecker,)
+
+ # configuration section name
+ name = "newstyle"
+ # messages
+ msgs = MSGS
+ priority = -2
+ # configuration options
+ options = ()
+
+ @check_messages("bad-super-call")
+ def visit_functiondef(self, node):
+ """check use of super"""
+ # ignore actual functions or method within a new style class
+ if not node.is_method():
+ return
+ klass = node.parent.frame()
+ for stmt in node.nodes_of_class(astroid.Call):
+ if node_frame_class(stmt) != node_frame_class(node):
+ # Don't look down in other scopes.
+ continue
+
+ expr = stmt.func
+ if not isinstance(expr, astroid.Attribute):
+ continue
+
+ call = expr.expr
+ # skip the test if using super
+ if not (
+ isinstance(call, astroid.Call)
+ and isinstance(call.func, astroid.Name)
+ and call.func.name == "super"
+ ):
+ continue
+
+ # super should not be used on an old style class
+ if klass.newstyle or not has_known_bases(klass):
+ # super first arg should not be the class
+ if not call.args:
+ continue
+
+ # calling super(type(self), self) can lead to recursion loop
+ # in derived classes
+ arg0 = call.args[0]
+ if (
+ isinstance(arg0, astroid.Call)
+ and isinstance(arg0.func, astroid.Name)
+ and arg0.func.name == "type"
+ ):
+ self.add_message("bad-super-call", node=call, args=("type",))
+ continue
+
+ # calling super(self.__class__, self) can lead to recursion loop
+ # in derived classes
+ if (
+ len(call.args) >= 2
+ and isinstance(call.args[1], astroid.Name)
+ and call.args[1].name == "self"
+ and isinstance(arg0, astroid.Attribute)
+ and arg0.attrname == "__class__"
+ ):
+ self.add_message(
+ "bad-super-call", node=call, args=("self.__class__",)
+ )
+ continue
+
+ try:
+ supcls = call.args and next(call.args[0].infer(), None)
+ except astroid.InferenceError:
+ continue
+
+ if klass is not supcls:
+ name = None
+ # if supcls is not Uninferable, then supcls was inferred
+ # and use its name. Otherwise, try to look
+ # for call.args[0].name
+ if supcls:
+ name = supcls.name
+ elif call.args and hasattr(call.args[0], "name"):
+ name = call.args[0].name
+ if name:
+ self.add_message("bad-super-call", node=call, args=(name,))
+
+ visit_asyncfunctiondef = visit_functiondef
+
+
+def register(linter):
+ """required method to auto register this checker """
+ linter.register_checker(NewStyleConflictChecker(linter))