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metadata: auto-convert YAML special float values: .nan .inf -.inf
Even for people who know what the special floats not-a-number, infinity, and negative infinity, they don't necessarily know the YAML 1.2 syntax for these. I didn't. And I've spent some quality time fighting things with those values. They are also easy to reliably convert to string values.
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@ -20,6 +20,7 @@
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import git
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from pathlib import Path
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import math
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import platform
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import os
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import re
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@ -897,6 +898,14 @@ def _normalize_type_string(v):
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if v:
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return 'true'
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return 'false'
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if isinstance(v, float):
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# YAML 1.2 values for NaN, Inf, and -Inf
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if math.isnan(v):
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return '.nan'
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if math.isinf(v):
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if v > 0:
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return '.inf'
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return '-.inf'
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return str(v)
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@ -965,6 +965,24 @@ class MetadataTest(unittest.TestCase):
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{'AntiFeatures': {'true': {}}},
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)
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def test_parse_yaml_app_antifeatures_float_nan(self):
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self.assertEqual(
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metadata.parse_yaml_metadata(io.StringIO('AntiFeatures: .nan')),
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{'AntiFeatures': {'.nan': {}}},
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)
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def test_parse_yaml_app_antifeatures_float_inf(self):
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self.assertEqual(
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metadata.parse_yaml_metadata(io.StringIO('AntiFeatures: .inf')),
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{'AntiFeatures': {'.inf': {}}},
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)
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def test_parse_yaml_app_antifeatures_float_negative_inf(self):
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self.assertEqual(
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metadata.parse_yaml_metadata(io.StringIO('AntiFeatures: -.inf')),
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{'AntiFeatures': {'-.inf': {}}},
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)
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def test_parse_yaml_app_antifeatures_int(self):
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self.assertEqual(
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metadata.parse_yaml_metadata(io.StringIO('AntiFeatures: 1')),
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