Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test__opcode.py @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents 895cf5801f4c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import dis
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895cf5801f4c Don't attempt to run the _opcode test if it wasn't built.
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2 from test.support import run_unittest, import_module
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3 import unittest
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4
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895cf5801f4c Don't attempt to run the _opcode test if it wasn't built.
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5 _opcode = import_module("_opcode")
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6
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7 class OpcodeTests(unittest.TestCase):
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8
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9 def test_stack_effect(self):
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10 self.assertEqual(_opcode.stack_effect(dis.opmap['POP_TOP']), -1)
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11 self.assertEqual(_opcode.stack_effect(dis.opmap['DUP_TOP_TWO']), 2)
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12 self.assertEqual(_opcode.stack_effect(dis.opmap['BUILD_SLICE'], 0), -1)
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13 self.assertEqual(_opcode.stack_effect(dis.opmap['BUILD_SLICE'], 1), -1)
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14 self.assertEqual(_opcode.stack_effect(dis.opmap['BUILD_SLICE'], 3), -2)
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15 self.assertRaises(ValueError, _opcode.stack_effect, 30000)
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16 self.assertRaises(ValueError, _opcode.stack_effect, dis.opmap['BUILD_SLICE'])
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17 self.assertRaises(ValueError, _opcode.stack_effect, dis.opmap['POP_TOP'], 0)
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18
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19 def test_main():
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20 run_unittest(OpcodeTests)
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21
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22 if __name__ == "__main__":
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23 test_main()