How to use 'python if boolean' in Python

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313def test_is_bool(self):
314 output = self.run('''
315 echo is_bool(0), is_bool(0.0), is_bool(NULL), is_bool(array());
316 echo is_bool(FALSE), is_bool(TRUE), is_bool("foo");
317 ''')
318 assert [i.boolval for i in output] == [False, False, False, False,
319 True, True, False]
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