""" Tests for detecting redefinition of builtins. """ from pyflakes import messages as m from pyflakes.test.harness import TestCase class TestBuiltins(TestCase): def test_builtin_unbound_local(self): self.flakes(''' def foo(): a = range(1, 10) range = a return range foo() print(range) ''', m.UndefinedLocal) def test_global_shadowing_builtin(self): self.flakes(''' def f(): global range range = None print(range) f() ''')