8th day of python challenges 111-117

2019-08-04 15:26:35 +03:00
parent b04c1b055f
commit 627802c383
3215 changed files with 760227 additions and 491 deletions
--- a/venv/lib/python3.6/site-packages/pylint/checkers/newstyle.py
+++ b/venv/lib/python3.6/site-packages/pylint/checkers/newstyle.py
@@ -0,0 +1,142 @@
+# 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 sys
+
+import astroid
+
+from pylint.interfaces import IAstroidChecker
+from pylint.checkers import BaseChecker
+from pylint.checkers.utils import check_messages, node_frame_class, has_known_bases
+
+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.",
+    ),
+    "E1004": (
+        "Missing argument to super()",
+        "missing-super-argument",
+        "Used when the super builtin didn't receive an argument.",
+        {"maxversion": (3, 0)},
+    ),
+}
+
+
+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", "missing-super-argument")
+    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
+
+            if not klass.newstyle and has_known_bases(klass):
+                # super should not be used on an old style class
+                continue
+            else:
+                # super first arg should be the class
+                if not call.args:
+                    if sys.version_info[0] == 3:
+                        # unless Python 3
+                        continue
+                    else:
+                        self.add_message("missing-super-argument", node=call)
+                        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 infered
+                    # 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))