pex.config.rangeField.RangeField Class Reference

Inheritance diagram for pex.config.rangeField.RangeField:

Public Member Functions
def	__init__ (self, doc, dtype, default=None, optional=False, min=None, max=None, inclusiveMin=True, inclusiveMax=False, deprecated=None)
def	rename (self, instance)
def	validate (self, instance)
def	freeze (self, instance)
def	save (self, outfile, instance)
def	toDict (self, instance)
def	__get__ (self, instance, owner=None, at=None, label="default")
def	__set__ (self, instance, value, at=None, label='assignment')
def	__delete__ (self, instance, at=None, label='deletion')

Public Attributes
	min
	max
	maxCheck
	minCheck
	rangeString
	dtype
	doc
	deprecated
	default
	check
	optional
	source

Static Public Attributes
	supportedTypes = set((int, float))

Detailed Description

A configuration field (`lsst.pex.config.Field` subclass) that requires
the value to be in a specific numeric range.

Parameters
----------
doc : `str`
    A description of the field.
dtype : {`int`-type, `float`-type}
    The field's data type: either the `int` or `float` type.
default : `int` or `float`, optional
    Default value for the field.
optional : `bool`, optional
    When `False`, `lsst.pex.config.Config.validate` will fail if the
    field's value is `None`.
min : int, float, or `None`, optional
    Minimum value accepted in the range. If `None`, the range has no
    lower bound (equivalent to negative infinity).
max : `int`, `float`, or None, optional
    Maximum value accepted in the range. If `None`, the range has no
    upper bound (equivalent to positive infinity).
inclusiveMin : `bool`, optional
    If `True` (default), the ``min`` value is included in the allowed
    range.
inclusiveMax : `bool`, optional
    If `True` (default), the ``max`` value is included in the allowed
    range.
deprecated : None or `str`, optional
    A description of why this Field is deprecated, including removal date.
    If not None, the string is appended to the docstring for this Field.

See also
--------
ChoiceField
ConfigChoiceField
ConfigDictField
ConfigField
ConfigurableField
DictField
Field
ListField
RegistryField

Definition at line 34 of file rangeField.py.

Constructor & Destructor Documentation

__init__()

def pex.config.rangeField.RangeField.__init__	(		self,
			doc,
			dtype,
			default = None,
			optional = False,
			min = None,
			max = None,
			inclusiveMin = True,
			inclusiveMax = False,
			deprecated = None
	)

Definition at line 83 of file rangeField.py.

    def __init__(self, doc, dtype, default=None, optional=False,
                 min=None, max=None, inclusiveMin=True, inclusiveMax=False,
                 deprecated=None):
        if dtype not in self.supportedTypes:
            raise ValueError("Unsupported RangeField dtype %s" % (_typeStr(dtype)))
        source = getStackFrame()
        if min is None and max is None:
            raise ValueError("min and max cannot both be None")
 
        if min is not None and max is not None:
            if min > max:
                raise ValueError("min = %s > %s = max" % (min, max))
            elif min == max and not (inclusiveMin and inclusiveMax):
                raise ValueError("min = max = %s and min and max not both inclusive" % (min,))
 
        self.min = min
        """Minimum value accepted in the range. If `None`, the range has no
        lower bound (equivalent to negative infinity).
        """
 
        self.max = max
        """Maximum value accepted in the range. If `None`, the range has no
        upper bound (equivalent to positive infinity).
        """
 
        if inclusiveMax:
            self.maxCheck = lambda x, y: True if y is None else x <= y
        else:
            self.maxCheck = lambda x, y: True if y is None else x < y
        if inclusiveMin:
            self.minCheck = lambda x, y: True if y is None else x >= y
        else:
            self.minCheck = lambda x, y: True if y is None else x > y
        self._setup(doc, dtype=dtype, default=default, check=None, optional=optional, source=source,
                    deprecated=deprecated)
        self.rangeString = "%s%s,%s%s" % \
            (("[" if inclusiveMin else "("),
             ("-inf" if self.min is None else self.min),
             ("inf" if self.max is None else self.max),
             ("]" if inclusiveMax else ")"))
        """String representation of the field's allowed range (`str`).
        """
 
        self.__doc__ += "\n\nValid Range = " + self.rangeString
 

Member Function Documentation

__delete__()

def pex.config.config.Field.__delete__ (   self,   instance,   at = None,   label = 'deletion'  )

inherited

Delete an attribute from a `lsst.pex.config.Config` instance.

Parameters
----------
instance : `lsst.pex.config.Config`
    The config instance that contains this field.
at : `list` of `lsst.pex.config.callStack.StackFrame`
    The call stack (created by
    `lsst.pex.config.callStack.getCallStack`).
label : `str`, optional
    Event label for the history.

Notes
-----
This is invoked by the owning `~lsst.pex.config.Config` object and
should not be called directly.

Definition at line 573 of file config.py.

    def __delete__(self, instance, at=None, label='deletion'):
        """Delete an attribute from a `lsst.pex.config.Config` instance.
 
        Parameters
        ----------
        instance : `lsst.pex.config.Config`
            The config instance that contains this field.
        at : `list` of `lsst.pex.config.callStack.StackFrame`
            The call stack (created by
            `lsst.pex.config.callStack.getCallStack`).
        label : `str`, optional
            Event label for the history.
 
        Notes
        -----
        This is invoked by the owning `~lsst.pex.config.Config` object and
        should not be called directly.
        """
        if at is None:
            at = getCallStack()
        self.__set__(instance, None, at=at, label=label)
 

__get__()

def pex.config.config.Field.__get__ (   self,   instance,   owner = None,   at = None,   label = "default"  )

inherited

Define how attribute access should occur on the Config instance
This is invoked by the owning config object and should not be called
directly

When the field attribute is accessed on a Config class object, it
returns the field object itself in order to allow inspection of
Config classes.

When the field attribute is access on a config instance, the actual
value described by the field (and held by the Config instance) is
returned.

Reimplemented in pex.config.configurableField.ConfigurableField.

Definition at line 498 of file config.py.

    def __get__(self, instance, owner=None, at=None, label="default"):
        """Define how attribute access should occur on the Config instance
        This is invoked by the owning config object and should not be called
        directly
 
        When the field attribute is accessed on a Config class object, it
        returns the field object itself in order to allow inspection of
        Config classes.
 
        When the field attribute is access on a config instance, the actual
        value described by the field (and held by the Config instance) is
        returned.
        """
        if instance is None or not isinstance(instance, Config):
            return self
        else:
            return instance._storage[self.name]
 

__set__()

def pex.config.config.Field.__set__ (   self,   instance,   value,   at = None,   label = 'assignment'  )

inherited

Set an attribute on the config instance.

Parameters
----------
instance : `lsst.pex.config.Config`
    The config instance that contains this field.
value : obj
    Value to set on this field.
at : `list` of `lsst.pex.config.callStack.StackFrame`
    The call stack (created by
    `lsst.pex.config.callStack.getCallStack`).
label : `str`, optional
    Event label for the history.

Notes
-----
This method is invoked by the owning `lsst.pex.config.Config` object
and should not be called directly.

Derived `~lsst.pex.config.Field` classes may need to override the
behavior. When overriding ``__set__``, `~lsst.pex.config.Field` authors
should follow the following rules:

- Do not allow modification of frozen configs.
- Validate the new value **before** modifying the field. Except if the
  new value is `None`. `None` is special and no attempt should be made
  to validate it until `lsst.pex.config.Config.validate` is called.
- Do not modify the `~lsst.pex.config.Config` instance to contain
  invalid values.
- If the field is modified, update the history of the
  `lsst.pex.config.field.Field` to reflect the changes.

In order to decrease the need to implement this method in derived
`~lsst.pex.config.Field` types, value validation is performed in the
`lsst.pex.config.Field._validateValue`. If only the validation step
differs in the derived `~lsst.pex.config.Field`, it is simpler to
implement `lsst.pex.config.Field._validateValue` than to reimplement
``__set__``. More complicated behavior, however, may require
reimplementation.

Reimplemented in pex.config.configChoiceField.ConfigChoiceField, pex.config.listField.ListField, pex.config.configurableField.ConfigurableField, pex.config.dictField.DictField, and pex.config.configField.ConfigField.

Definition at line 516 of file config.py.

    def __set__(self, instance, value, at=None, label='assignment'):
        """Set an attribute on the config instance.
 
        Parameters
        ----------
        instance : `lsst.pex.config.Config`
            The config instance that contains this field.
        value : obj
            Value to set on this field.
        at : `list` of `lsst.pex.config.callStack.StackFrame`
            The call stack (created by
            `lsst.pex.config.callStack.getCallStack`).
        label : `str`, optional
            Event label for the history.
 
        Notes
        -----
        This method is invoked by the owning `lsst.pex.config.Config` object
        and should not be called directly.
 
        Derived `~lsst.pex.config.Field` classes may need to override the
        behavior. When overriding ``__set__``, `~lsst.pex.config.Field` authors
        should follow the following rules:
 
        - Do not allow modification of frozen configs.
        - Validate the new value **before** modifying the field. Except if the
          new value is `None`. `None` is special and no attempt should be made
          to validate it until `lsst.pex.config.Config.validate` is called.
        - Do not modify the `~lsst.pex.config.Config` instance to contain
          invalid values.
        - If the field is modified, update the history of the
          `lsst.pex.config.field.Field` to reflect the changes.
 
        In order to decrease the need to implement this method in derived
        `~lsst.pex.config.Field` types, value validation is performed in the
        `lsst.pex.config.Field._validateValue`. If only the validation step
        differs in the derived `~lsst.pex.config.Field`, it is simpler to
        implement `lsst.pex.config.Field._validateValue` than to reimplement
        ``__set__``. More complicated behavior, however, may require
        reimplementation.
        """
        if instance._frozen:
            raise FieldValidationError(self, instance, "Cannot modify a frozen Config")
 
        history = instance._history.setdefault(self.name, [])
        if value is not None:
            value = _autocast(value, self.dtype)
            try:
                self._validateValue(value)
            except BaseException as e:
                raise FieldValidationError(self, instance, str(e))
 
        instance._storage[self.name] = value
        if at is None:
            at = getCallStack()
        history.append((value, at, label))
 

freeze()

def pex.config.config.Field.freeze (   self,   instance  )

inherited

Make this field read-only (for internal use only).

Parameters
----------
instance : `lsst.pex.config.Config`
    The config instance that contains this field.

Notes
-----
Freezing is only relevant for fields that hold subconfigs. Fields which
hold subconfigs should freeze each subconfig.

**Subclasses should implement this method.**

Reimplemented in pex.config.configChoiceField.ConfigChoiceField, pex.config.configurableField.ConfigurableField, pex.config.configDictField.ConfigDictField, and pex.config.configField.ConfigField.

Definition at line 377 of file config.py.

    def freeze(self, instance):
        """Make this field read-only (for internal use only).
 
        Parameters
        ----------
        instance : `lsst.pex.config.Config`
            The config instance that contains this field.
 
        Notes
        -----
        Freezing is only relevant for fields that hold subconfigs. Fields which
        hold subconfigs should freeze each subconfig.
 
        **Subclasses should implement this method.**
        """
        pass
 

rename()

def pex.config.config.Field.rename (   self,   instance  )

inherited

Rename the field in a `~lsst.pex.config.Config` (for internal use
only).

Parameters
----------
instance : `lsst.pex.config.Config`
    The config instance that contains this field.

Notes
-----
This method is invoked by the `lsst.pex.config.Config` object that
contains this field and should not be called directly.

Renaming is only relevant for `~lsst.pex.config.Field` instances that
hold subconfigs. `~lsst.pex.config.Fields` that hold subconfigs should
rename each subconfig with the full field name as generated by
`lsst.pex.config.config._joinNamePath`.

Reimplemented in pex.config.configChoiceField.ConfigChoiceField, pex.config.configurableField.ConfigurableField, pex.config.configDictField.ConfigDictField, and pex.config.configField.ConfigField.

Definition at line 327 of file config.py.

    def rename(self, instance):
        """Rename the field in a `~lsst.pex.config.Config` (for internal use
        only).
 
        Parameters
        ----------
        instance : `lsst.pex.config.Config`
            The config instance that contains this field.
 
        Notes
        -----
        This method is invoked by the `lsst.pex.config.Config` object that
        contains this field and should not be called directly.
 
        Renaming is only relevant for `~lsst.pex.config.Field` instances that
        hold subconfigs. `~lsst.pex.config.Fields` that hold subconfigs should
        rename each subconfig with the full field name as generated by
        `lsst.pex.config.config._joinNamePath`.
        """
        pass
 

save()

def pex.config.config.Field.save (   self,   outfile,   instance  )

inherited

Save this field to a file (for internal use only).

Parameters
----------
outfile : file-like object
    A writeable field handle.
instance : `Config`
    The `Config` instance that contains this field.

Notes
-----
This method is invoked by the `~lsst.pex.config.Config` object that
contains this field and should not be called directly.

The output consists of the documentation string
(`lsst.pex.config.Field.doc`) formatted as a Python comment. The second
line is formatted as an assignment: ``{fullname}={value}``.

This output can be executed with Python.

Reimplemented in pex.config.configChoiceField.ConfigChoiceField, pex.config.configurableField.ConfigurableField, pex.config.configDictField.ConfigDictField, and pex.config.configField.ConfigField.

Definition at line 435 of file config.py.

    def save(self, outfile, instance):
        """Save this field to a file (for internal use only).
 
        Parameters
        ----------
        outfile : file-like object
            A writeable field handle.
        instance : `Config`
            The `Config` instance that contains this field.
 
        Notes
        -----
        This method is invoked by the `~lsst.pex.config.Config` object that
        contains this field and should not be called directly.
 
        The output consists of the documentation string
        (`lsst.pex.config.Field.doc`) formatted as a Python comment. The second
        line is formatted as an assignment: ``{fullname}={value}``.
 
        This output can be executed with Python.
        """
        value = self.__get__(instance)
        fullname = _joinNamePath(instance._name, self.name)
 
        if self.deprecated and value == self.default:
            return
 
        # write full documentation string as comment lines
        # (i.e. first character is #)
        doc = "# " + str(self.doc).replace("\n", "\n# ")
        if isinstance(value, float) and (math.isinf(value) or math.isnan(value)):
            # non-finite numbers need special care
            outfile.write(u"{}\n{}=float('{!r}')\n\n".format(doc, fullname, value))
        else:
            outfile.write(u"{}\n{}={!r}\n\n".format(doc, fullname, value))
 

toDict()

def pex.config.config.Field.toDict (   self,   instance  )

inherited

Convert the field value so that it can be set as the value of an
item in a `dict` (for internal use only).

Parameters
----------
instance : `Config`
    The `Config` that contains this field.

Returns
-------
value : object
    The field's value. See *Notes*.

Notes
-----
This method invoked by the owning `~lsst.pex.config.Config` object and
should not be called directly.

Simple values are passed through. Complex data structures must be
manipulated. For example, a `~lsst.pex.config.Field` holding a
subconfig should, instead of the subconfig object, return a `dict`
where the keys are the field names in the subconfig, and the values are
the field values in the subconfig.

Reimplemented in pex.config.configChoiceField.ConfigChoiceField, pex.config.listField.ListField, pex.config.configurableField.ConfigurableField, pex.config.dictField.DictField, pex.config.configField.ConfigField, and pex.config.configDictField.ConfigDictField.

Definition at line 471 of file config.py.

    def toDict(self, instance):
        """Convert the field value so that it can be set as the value of an
        item in a `dict` (for internal use only).
 
        Parameters
        ----------
        instance : `Config`
            The `Config` that contains this field.
 
        Returns
        -------
        value : object
            The field's value. See *Notes*.
 
        Notes
        -----
        This method invoked by the owning `~lsst.pex.config.Config` object and
        should not be called directly.
 
        Simple values are passed through. Complex data structures must be
        manipulated. For example, a `~lsst.pex.config.Field` holding a
        subconfig should, instead of the subconfig object, return a `dict`
        where the keys are the field names in the subconfig, and the values are
        the field values in the subconfig.
        """
        return self.__get__(instance)
 

validate()

def pex.config.config.Field.validate (   self,   instance  )

inherited

Validate the field (for internal use only).

Parameters
----------
instance : `lsst.pex.config.Config`
    The config instance that contains this field.

Raises
------
lsst.pex.config.FieldValidationError
    Raised if verification fails.

Notes
-----
This method provides basic validation:

- Ensures that the value is not `None` if the field is not optional.
- Ensures type correctness.
- Ensures that the user-provided ``check`` function is valid.

Most `~lsst.pex.config.Field` subclasses should call
`lsst.pex.config.field.Field.validate` if they re-implement
`~lsst.pex.config.field.Field.validate`.

Reimplemented in pex.config.configChoiceField.ConfigChoiceField, pex.config.configurableField.ConfigurableField, pex.config.listField.ListField, pex.config.configField.ConfigField, pex.config.dictField.DictField, and pex.config.configDictField.ConfigDictField.

Definition at line 348 of file config.py.

    def validate(self, instance):
        """Validate the field (for internal use only).
 
        Parameters
        ----------
        instance : `lsst.pex.config.Config`
            The config instance that contains this field.
 
        Raises
        ------
        lsst.pex.config.FieldValidationError
            Raised if verification fails.
 
        Notes
        -----
        This method provides basic validation:
 
        - Ensures that the value is not `None` if the field is not optional.
        - Ensures type correctness.
        - Ensures that the user-provided ``check`` function is valid.
 
        Most `~lsst.pex.config.Field` subclasses should call
        `lsst.pex.config.field.Field.validate` if they re-implement
        `~lsst.pex.config.field.Field.validate`.
        """
        value = self.__get__(instance)
        if not self.optional and value is None:
            raise FieldValidationError(self, instance, "Required value cannot be None")
 

Member Data Documentation

check

pex.config.config.Field.check

inherited

Definition at line 311 of file config.py.

default

pex.config.config.Field.default

inherited

Definition at line 307 of file config.py.

deprecated

pex.config.config.Field.deprecated

inherited

Definition at line 298 of file config.py.

doc

pex.config.config.Field.doc

inherited

Definition at line 294 of file config.py.

dtype

pex.config.config.Field.dtype

inherited

Definition at line 287 of file config.py.

max

pex.config.rangeField.RangeField.max

Definition at line 101 of file rangeField.py.

maxCheck

pex.config.rangeField.RangeField.maxCheck

Definition at line 107 of file rangeField.py.

min

pex.config.rangeField.RangeField.min

Definition at line 96 of file rangeField.py.

minCheck

pex.config.rangeField.RangeField.minCheck

Definition at line 111 of file rangeField.py.

optional

pex.config.config.Field.optional

inherited

Definition at line 315 of file config.py.

rangeString

pex.config.rangeField.RangeField.rangeString

Definition at line 116 of file rangeField.py.

source

pex.config.config.Field.source

inherited

Definition at line 322 of file config.py.

supportedTypes

pex.config.rangeField.RangeField.supportedTypes = set((int, float))

static

Definition at line 78 of file rangeField.py.

---

The documentation for this class was generated from the following file:

• /j/snowflake/release/lsstsw/stack/cb4e2dc/Linux64/pex_config/20.0.0+34a42eae2c/python/lsst/pex/config/rangeField.py