diff options
Diffstat (limited to 'pylint/checkers/variables.py')
| -rw-r--r-- | pylint/checkers/variables.py | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/pylint/checkers/variables.py b/pylint/checkers/variables.py index 78d78a913..784568ddd 100644 --- a/pylint/checkers/variables.py +++ b/pylint/checkers/variables.py @@ -64,6 +64,7 @@ PY3K = sys.version_info >= (3, 0) # for `abc` METACLASS_NAME_TRANSFORMS = {"_py_abc": "abc"} TYPING_TYPE_CHECKS_GUARDS = frozenset({"typing.TYPE_CHECKING", "TYPE_CHECKING"}) +BUILTIN_RANGE = "builtins.range" def _is_from_future_import(stmt, name): @@ -1145,7 +1146,7 @@ class VariablesChecker(BaseChecker): ): return - # For functions we can do more by inferring the length of the iterred object + # For functions we can do more by inferring the length of the itered object if not isinstance(assign, astroid.For): self.add_message("undefined-loop-variable", args=name, node=node) return @@ -1155,6 +1156,14 @@ class VariablesChecker(BaseChecker): except astroid.InferenceError: self.add_message("undefined-loop-variable", args=name, node=node) else: + if ( + isinstance(inferred, astroid.Instance) + and inferred.qname() == BUILTIN_RANGE + ): + # Consider range() objects safe, even if they might not yield any results. + return + + # Consider sequences. sequences = ( astroid.List, astroid.Tuple, |