Name#

class lsst.verify.Name(package=None, metric=None, spec=None)#

Bases: object

Semantic name of a package, Metric or Specification in the lsst.verify framework.

Name instances are immutable and can be used as keys in mappings.

Parameters#

packagestr or Name

Name of the package, either as a string ('validate_drp', for example) or as a Name object (Name(package='validate_drp') for example).

The package field can also be fully specified:

>>> Name(package='validate_drp.PA1.design_gri')
Name('validate_drp', 'PA1', 'design_gri')

Or the package field can be used as the sole positional argument:

>>> Name('validate_drp.PA1.design_gri')
Name('validate_drp', 'PA1', 'design_gri')

metricstr or Name

Name of the metric. The name can be relative ('PA') or fully-specified ('validate_drp.PA1').

specstr or Name

Name of the specification. The name can be bare ('design_gri'), metric-relative ('PA1.design_gri') or fully-specified ('validate_drp.PA1.design_gri')

Raises#

TypeError: Raised when arguments cannot be parsed or conflict (for example, if two different package names are specified through two different fields).

Notes#

Names in the Verification Framework are formatted as:

package.metric.specification

A fully-qualified name is one that has all components included. For example, a fully specified metric name is:

validate_drp.PA1

This means: “the PA1 metric in the validate_drp package.

An example of a fully-specificed specification name:

validate_drp.PA1.design

This means: “the design specification of the PA1 metric in the validate_drp package.

A relative name is one that’s missing a component. For example:

PA1.design

Asserting this is a relative specification name, the package is not known.

Examples#

Creation

There are many patterns for creating Name instances. Different patterns are useful in different circumstances.

You can create a metric name from its components:

>>> Name(package='validate_drp', metric='PA1')
Name('validate_drp', 'PA1')

Or a specification name from components:

>>> Name(package='validate_drp', metric='PA1', spec='design')
Name('validate_drp', 'PA1', 'design')

You can equivalently create Names from fully-qualified strings:

>>> Name('validate_drp.PA1')
Name('validate_drp', 'PA1')

>>> Name('validate_drp.PA1.design')
Name('validate_drp', 'PA1', 'design')

You can also use an existing name to specify some components of the name:

>>> metric_name = Name('validate_drp.PA1')
>>> Name(metric=metric_name, spec='design')
Name('validate_drp', 'PA1', 'design')

A TypeError is raised if any components of the input names conflict.

Fully-specified metric names can be mixed with a spec component:

>>> Name(metric='validate_drp.PA1', spec='design')
Name('validate_drp', 'PA1', 'design')

String representation

Converting a Name into a str gives you the canonical string representation, as fully-specified as possible:

>>> str(Name('validate_drp', 'PA1', 'design'))
'validate_drp.PA1.design'

Alternatively, obtain the fully-qualified metric name from the Name.fqn property:

>>> name = Name('validate_drp', 'PA1', 'design')
>>> name.fqn
'validate_drp.PA1.design'

The relative name of a specification omits the package component:

>>> name = Name('validate_drp.PA1.design')
>>> name.relative_name
'PA1.design'

Attributes Summary

`fqn`	The fully-qualified name (`str`).
`has_metric`	`True` if this object contains a metric name, either relative or fully-qualified (`bool`).
`has_package`	`True` if this object contains a package name (`bool`).
`has_relative`	`True` if a relative specification name can be formed from this object, i.e., `metric` and `spec` attributes are set (`bool`).
`has_spec`	`True` if this object contains a specification name, either relative or fully-qualified (`bool`).
`is_fq`	`True` if this object is a fully-qualified name of either a package, metric or specification (`bool`).
`is_metric`	`True` if this object is a metric name, either relative or fully-qualified (`bool`).
`is_package`	`True` if this object is a package name (`bool`).
`is_relative`	`True` if this object is a specification name that's not fully-qualified, but is relative to a metric name (`bool`).
`is_spec`	`True` if this object is a specification name, either relative or fully-qualified (`bool`).
`metric`	Metric name (`str`).
`package`	Package name (`str`).
`relative_name`	The relative specification name (`str`).
`spec`	Specification name (`str`).

Attributes Documentation

fqn#

The fully-qualified name (str).

Raises#

AttributeError: If the name is not a fully-qualified name (check is_fq)

Examples#

>>> Name('validate_drp', 'PA1').fqn
'validate_drp.PA1'
>>> Name('validate_drp', 'PA1', 'design').fqn
'validate_drp.PA1.design'

has_metric#

True if this object contains a metric name, either relative or fully-qualified (bool).

>>> Name('validate_drp.PA1').has_metric
True
>>> Name(spec='design').has_metric
False

has_package#

True if this object contains a package name (bool).

>>> Name('validate_drp.PA1').has_package
True
>>> Name(spec='design').has_package
False

has_relative#: True if a relative specification name can be formed from this object, i.e., metric and spec attributes are set (bool).

has_spec#

True if this object contains a specification name, either relative or fully-qualified (bool).

>>> Name(spec='design').has_spec
True
>>> Name('validate_drp.PA1').has_spec
False

is_fq#

True if this object is a fully-qualified name of either a package, metric or specification (bool).

Examples#

A fully-qualified package name:

>>> Name('validate_drp').is_fq
True

A fully-qualified metric name:

>>> Name('validate_drp.PA1').is_fq
True

A fully-qualified specification name:

>>> Name('validate_drp.PA1.design_gri').is_fq
True

is_metric#

True if this object is a metric name, either relative or fully-qualified (bool).

>>> Name('validate_drp.PA1').is_metric
True
>>> Name('validate_drp.PA1.design').is_metric
False

is_package#

True if this object is a package name (bool).

>>> Name('validate_drp').is_package
True
>>> Name('validate_drp.PA1').is_package
False

is_relative#

True if this object is a specification name that’s not fully-qualified, but is relative to a metric name (bool). relative to a base name. (bool).

Package and metric names are never relative.

A relative specification name:

>>> Name(spec='PA1.design_gri').is_relative
True

But not:

>>> Name('validate_drp.PA1.design_gri').is_relative
False

is_spec#

True if this object is a specification name, either relative or fully-qualified (bool).

>>> Name('validate_drp.PA1').is_spec
False
>>> Name('validate_drp.PA1.design').is_spec
True

metric#

Metric name (str).

>>> name = Name('validate_drp.PA1.design')
>>> name.metric
'PA1'

package#

Package name (str).

>>> name = Name('validate_drp.PA1.design')
>>> name.package
'validate_drp'

relative_name#

The relative specification name (str).

Raises#

AttributeError: If the object does not represent a specification, or if a relative name cannot be formed because the metric is None.

Examples#

>>> Name('validate_drp.PA1.design').relative_name
'PA1.design'

spec#

Specification name (str).

>>> name = Name('validate_drp.PA1.design')
>>> name.spec
'design'