lsst.pex.config.comparison Namespace Reference
Functions | |
| getComparisonName (name1, name2) | |
| compareScalars (name, v1, v2, output, rtol=1e-8, atol=1e-8, dtype=None) | |
| compareConfigs (name, c1, c2, shortcut=True, rtol=1e-8, atol=1e-8, output=None) | |
Detailed Description
Helper functions for comparing `lsst.pex.config.Config` instancess. Theses function should be use for any comparison in a `lsst.pex.Config.compare` or `lsst.pex.config.Field._compare` implementation, as they take care of writing messages as well as floating-point comparisons and shortcuts.
Function Documentation
◆ compareConfigs()
| lsst.pex.config.comparison.compareConfigs | ( | name, | |
| c1, | |||
| c2, | |||
| shortcut = True, | |||
| rtol = 1e-8, | |||
| atol = 1e-8, | |||
| output = None ) |
Compare two `lsst.pex.config.Config` instances for equality.
This function is a helper for `lsst.pex.config.Config.compare`.
Parameters
----------
name : `str`
Name to use when reporting differences, typically created by
`getComparisonName`. This will always appear as the beginning of any
messages reported via ``output``.
c1 : `lsst.pex.config.Config`
Left-hand side config to compare.
c2 : `lsst.pex.config.Config`
Right-hand side config to compare.
shortcut : `bool`, optional
If `True`, return as soon as an inequality is found. Default is `True`.
rtol : `float`, optional
Relative tolerance for floating point comparisons.
atol : `float`, optional
Absolute tolerance for floating point comparisons.
output : callable, optional
A callable that takes a string, used (possibly repeatedly) to report
inequalities. For example: `print`.
Returns
-------
areEqual : `bool`
`True` when the two `lsst.pex.config.Config` instances are equal.
`False` if there is an inequality.
See Also
--------
lsst.pex.config.compareScalars
Notes
-----
Floating point comparisons are performed by `numpy.allclose`.
If ``c1`` or ``c2`` contain `~lsst.pex.config.RegistryField` or
`~lsst.pex.config.ConfigChoiceField` instances, *unselected*
`~lsst.pex.config.Config` instances will not be compared.
Definition at line 112 of file comparison.py.
112def compareConfigs(name, c1, c2, shortcut=True, rtol=1e-8, atol=1e-8, output=None):
113 """Compare two `lsst.pex.config.Config` instances for equality.
114
115 This function is a helper for `lsst.pex.config.Config.compare`.
116
117 Parameters
118 ----------
119 name : `str`
120 Name to use when reporting differences, typically created by
121 `getComparisonName`. This will always appear as the beginning of any
122 messages reported via ``output``.
123 c1 : `lsst.pex.config.Config`
124 Left-hand side config to compare.
125 c2 : `lsst.pex.config.Config`
126 Right-hand side config to compare.
127 shortcut : `bool`, optional
128 If `True`, return as soon as an inequality is found. Default is `True`.
129 rtol : `float`, optional
130 Relative tolerance for floating point comparisons.
131 atol : `float`, optional
132 Absolute tolerance for floating point comparisons.
133 output : callable, optional
134 A callable that takes a string, used (possibly repeatedly) to report
135 inequalities. For example: `print`.
136
137 Returns
138 -------
139 areEqual : `bool`
140 `True` when the two `lsst.pex.config.Config` instances are equal.
141 `False` if there is an inequality.
142
143 See Also
144 --------
145 lsst.pex.config.compareScalars
146
147 Notes
148 -----
149 Floating point comparisons are performed by `numpy.allclose`.
150
151 If ``c1`` or ``c2`` contain `~lsst.pex.config.RegistryField` or
152 `~lsst.pex.config.ConfigChoiceField` instances, *unselected*
153 `~lsst.pex.config.Config` instances will not be compared.
154 """
155 from .config import _typeStr
156
157 assert name is not None
158 if c1 is None:
159 if c2 is None:
160 return True
161 else:
162 if output is not None:
163 output(f"{name}: None != {c2!r}.")
164 return False
165 else:
166 if c2 is None:
167 if output is not None:
168 output(f"{name}: {c1!r} != None.")
169 return False
170 if type(c1) is not type(c2):
171 if output is not None:
172 output(f"{name}: config types do not match; {_typeStr(c1)} != {_typeStr(c2)}.")
173 return False
174 equal = True
175 for field in c1._fields.values():
176 result = field._compare(c1, c2, shortcut=shortcut, rtol=rtol, atol=atol, output=output)
177 if not result and shortcut:
178 return False
179 equal = equal and result
180 return equal
◆ compareScalars()
| lsst.pex.config.comparison.compareScalars | ( | name, | |
| v1, | |||
| v2, | |||
| output, | |||
| rtol = 1e-8, | |||
| atol = 1e-8, | |||
| dtype = None ) |
Compare two scalar values for equality.
This function is a helper for `lsst.pex.config.Config.compare`.
Parameters
----------
name : `str`
Name to use when reporting differences, typically created by
`getComparisonName`. This will always appear as the beginning of any
messages reported via ``output``.
v1 : object
Left-hand side value to compare.
v2 : object
Right-hand side value to compare.
output : callable or `None`
A callable that takes a string, used (possibly repeatedly) to report
inequalities (for example, `print`). Set to `None` to disable output.
rtol : `float`, optional
Relative tolerance for floating point comparisons.
atol : `float`, optional
Absolute tolerance for floating point comparisons.
dtype : class, optional
Data type of values for comparison. May be `None` if values are not
floating-point.
Returns
-------
areEqual : `bool`
`True` if the values are equal, `False` if they are not.
See Also
--------
lsst.pex.config.compareConfigs
Notes
-----
Floating point comparisons are performed by `numpy.allclose`.
Definition at line 62 of file comparison.py.
62def compareScalars(name, v1, v2, output, rtol=1e-8, atol=1e-8, dtype=None):
63 """Compare two scalar values for equality.
64
65 This function is a helper for `lsst.pex.config.Config.compare`.
66
67 Parameters
68 ----------
69 name : `str`
70 Name to use when reporting differences, typically created by
71 `getComparisonName`. This will always appear as the beginning of any
72 messages reported via ``output``.
73 v1 : object
74 Left-hand side value to compare.
75 v2 : object
76 Right-hand side value to compare.
77 output : callable or `None`
78 A callable that takes a string, used (possibly repeatedly) to report
79 inequalities (for example, `print`). Set to `None` to disable output.
80 rtol : `float`, optional
81 Relative tolerance for floating point comparisons.
82 atol : `float`, optional
83 Absolute tolerance for floating point comparisons.
84 dtype : class, optional
85 Data type of values for comparison. May be `None` if values are not
86 floating-point.
87
88 Returns
89 -------
90 areEqual : `bool`
91 `True` if the values are equal, `False` if they are not.
92
93 See Also
94 --------
95 lsst.pex.config.compareConfigs
96
97 Notes
98 -----
99 Floating point comparisons are performed by `numpy.allclose`.
100 """
101 if v1 is None or v2 is None:
102 result = v1 == v2
103 elif dtype in (float, complex):
104 result = numpy.allclose(v1, v2, rtol=rtol, atol=atol) or (numpy.isnan(v1) and numpy.isnan(v2))
105 else:
106 result = v1 == v2
107 if not result and output is not None:
108 output(f"{name}: {v1!r} != {v2!r}")
109 return result
110
111
◆ getComparisonName()
| lsst.pex.config.comparison.getComparisonName | ( | name1, | |
| name2 ) |
Create a comparison name that is used for printed output of comparisons.
Parameters
----------
name1 : `str`
Name of the first configuration.
name2 : `str`
Name of the second configuration.
Returns
-------
name : `str`
When ``name1`` and ``name2`` are equal, the returned name is
simply one of the names. When they are different the returned name is
formatted as ``"{name1} / {name2}"``.
Definition at line 40 of file comparison.py.
40def getComparisonName(name1, name2):
41 """Create a comparison name that is used for printed output of comparisons.
42
43 Parameters
44 ----------
45 name1 : `str`
46 Name of the first configuration.
47 name2 : `str`
48 Name of the second configuration.
49
50 Returns
51 -------
52 name : `str`
53 When ``name1`` and ``name2`` are equal, the returned name is
54 simply one of the names. When they are different the returned name is
55 formatted as ``"{name1} / {name2}"``.
56 """
57 if name1 != name2:
58 return f"{name1} / {name2}"
59 return name1
60
61
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