Source code for openmdao.utils.options_dictionary

"""Define the OptionsDictionary class."""

import re

from openmdao.utils.om_warnings import warn_deprecation
from openmdao.utils.notebook_utils import notebook_mode

from openmdao.core.constants import _UNDEFINED


# regex to check for valid names.
namecheck_rgx = re.compile('[a-zA-Z_][_a-zA-Z0-9]*')


#
# Template for `check_valid` function
#
[docs]def check_valid(name, value): """ Check the validity of value for the option with name. Parameters ---------- name : str Name of the option. value : any Value for the option. Raises ------ ValueError If value is not valid for option. """ raise ValueError(f"Option '{name}' with value {value} is not valid.")
[docs]class OptionsDictionary(object): """ Dictionary with pre-declaration of keys for value-checking and default values. This class is instantiated for: 1. the options attribute in solvers, drivers, and processor allocators 2. the supports attribute in drivers 3. the options attribute in systems Parameters ---------- parent_name : str Name or class name of System that owns this OptionsDictionary. read_only : bool If True, setting (via __setitem__ or update) is not permitted. Attributes ---------- _dict : dict of dict Dictionary of entries. Each entry is a dictionary consisting of value, values, types, desc, lower, and upper. _parent_name : str or None If defined, prepend this name to beginning of all exceptions. _read_only : bool If True, no options can be set after declaration. _all_recordable : bool Flag to determine if all options in UserOptions are recordable. _widget : OptionsWidget If running in a Jupyter notebook, a widget for viewing/setting options. """
[docs] def __init__(self, parent_name=None, read_only=False): """ Initialize all attributes. """ self._dict = {} self._parent_name = parent_name self._read_only = read_only self._all_recordable = True
def __getstate__(self): """ Return state as a dict. Returns ------- dict State to get. """ if self._all_recordable: return self.__dict__ else: state = self.__dict__.copy() state['_dict'] = {key: val for key, val in state['_dict'].items() if val['recordable']} return state def __repr__(self): """ Return a dictionary representation of the options. Returns ------- dict The options dictionary. """ return self._dict.__repr__() def _repr_pretty_(self, p, cycle): if not cycle and notebook_mode(): try: from openmdao.visualization.options_widget import OptionsWidget return OptionsWidget(self) except Exception: pass return repr(self) def __rst__(self): """ Generate reStructuredText view of the options table. Returns ------- list of str A rendition of the options as an rST table. """ lines = self.to_table(fmt='rst').split('\n') return lines
[docs] def to_table(self, fmt='github', missingval='N/A'): """ Get a table representation of this OptionsDictionary as a table in the requested format. Parameters ---------- fmt : str The formatting of the requested table. Options are the same as those available to the tabulate package. See tabulate.tabulate_formats for a complete list. Default value of 'github' produces a table in GitHub-flavored markdown. missingval : str The value to be displayed in place of None. Returns ------- str A string representation of the table in the requested format. """ try: from tabulate import tabulate except ImportError as e: msg = "'to_table' requires the tabulate package but it is not currently installed." \ " Use `pip install tabulate` or install openmdao with" \ " `pip install openmdao[notebooks]`." raise ImportError(msg) hdrs = ['Option', 'Default', 'Acceptable Values', 'Acceptable Types', 'Description'] rows = [] for key in sorted(self._dict.keys()): option = self._dict[key] deprecations = False default = option['val'] if option['val'] is not _UNDEFINED else '**Required**' default_str = str(default) # if the default is an object instance, replace with the (unqualified) object type idx = default_str.find(' object at ') if idx >= 0 and default_str[0] == '<': parts = default_str[:idx].split('.') default = parts[-1] acceptable_values = option['values'] if acceptable_values is not None: if not isinstance(acceptable_values, (set, tuple, list)): acceptable_values = (acceptable_values,) acceptable_values = [value for value in acceptable_values] acceptable_types = option['types'] if acceptable_types is not None: if not isinstance(acceptable_types, (set, tuple, list)): acceptable_types = (acceptable_types,) acceptable_types = [type_.__name__ for type_ in acceptable_types] desc = option['desc'] deprecation = option['deprecation'] if deprecation is not None: if not deprecations: hdrs.append('Deprecation') deprecations = True rows.append([key, default, acceptable_values, acceptable_types, desc, deprecation[0]]) else: rows.append([key, default, acceptable_values, acceptable_types, desc]) return tabulate(rows, headers=hdrs, tablefmt=fmt, missingval=missingval)
def __str__(self, width=100): """ Generate text string representation of the options table. Parameters ---------- width : int The maximum width of the text. Returns ------- str A text representation of the options table. """ rst = self.to_table(fmt='rst').split('\n') cols = [len(header) for header in rst[0].split()] desc_col = sum(cols[:-1]) + 2 * (len(cols) - 1) desc_len = width - desc_col # if it won't fit in allowed width, just return the rST if desc_len < 10: return '\n'.join(rst) text = [] for row in rst: if len(row) > width: text.append(row[:width]) if not row.startswith('==='): row = row[width:].rstrip() while(len(row) > 0): text.append(' ' * desc_col + row[:desc_len]) row = row[desc_len:] else: text.append(row) return '\n'.join(text) def _raise(self, msg, exc_type=RuntimeError): """ Raise the given exception type, with parent's name prepended to the message. Parameters ---------- msg : str The error message. exc_type : class The type of the exception to be raised. """ if self._parent_name is None: full_msg = msg else: full_msg = '{}: {}'.format(self._parent_name, msg) raise exc_type(full_msg) def _assert_valid(self, name, value): """ Check whether the given value is valid, where the key has already been declared. The optional checks consist of ensuring: the value is one of a list of acceptable values, the type of value is one of a list of acceptable types, value is not less than lower, value is not greater than upper, and value satisfies check_valid. Parameters ---------- name : str The key for the declared option. value : object The default or user-set value to check for value, type, lower, and upper. """ meta = self._dict[name] values = meta['values'] types = meta['types'] lower = meta['lower'] upper = meta['upper'] if not (value is None and meta['allow_none']): # If only values is declared if values is not None: check_vals = [value] if types is not list else value for val in check_vals: if val not in values: if isinstance(value, str): value = f"'{value}'" self._raise(f"Value ({value}) of option '{name}' is not one of {values}.", ValueError) # If only types is declared elif types is not None: if not isinstance(value, types): vtype = type(value).__name__ if isinstance(value, str): value = "'{}'".format(value) if isinstance(types, (set, tuple, list)): typs = tuple([type_.__name__ for type_ in types]) self._raise("Value ({}) of option '{}' has type '{}', but one of " "types {} was expected.".format(value, name, vtype, typs), exc_type=TypeError) else: self._raise("Value ({}) of option '{}' has type '{}', but type '{}' " "was expected.".format(value, name, vtype, types.__name__), exc_type=TypeError) if upper is not None: if value > upper: self._raise("Value ({}) of option '{}' " "exceeds maximum allowed value of {}.".format(value, name, upper), exc_type=ValueError) if lower is not None: if value < lower: self._raise("Value ({}) of option '{}' " "is less than minimum allowed value of {}.".format(value, name, lower), exc_type=ValueError) # General function test if meta['check_valid'] is not None: meta['check_valid'](name, value)
[docs] def declare(self, name, default=_UNDEFINED, values=None, types=None, desc='', upper=None, lower=None, check_valid=None, allow_none=False, recordable=True, deprecation=None): r""" Declare an option. The value of the option must satisfy the following: 1. If values only was given when declaring, value must be in values. 2. If types only was given when declaring, value must satisfy isinstance(value, types). 3. It is an error if both values and types are given. Parameters ---------- name : str Name of the option. default : object or Null Optional default value that must be valid under the above 3 conditions. values : set or list or tuple or None Optional list of acceptable option values. types : type or tuple of types or None Optional type or list of acceptable option types. desc : str Optional description of the option. upper : float or None Maximum allowable value. lower : float or None Minimum allowable value. check_valid : function or None User-supplied function with arguments (name, value) that raises an exception if the value is not valid. allow_none : bool If True, allow None as a value regardless of values or types. recordable : bool If True, add to recorder. deprecation : str or tuple or None If None, it is not deprecated. If a str, use as a DeprecationWarning during __setitem__ and __getitem__. If a tuple of the form (msg, new_name), display msg as with str, and forward any __setitem__/__getitem__ to new_name. """ match = namecheck_rgx.match(name) if match is None or match.group() != name: warn_deprecation(f"'{name}' is not a valid python name and will become an invalid " "option name in a future release. You can prevent this warning (and " "future exceptions) by declaring this option using a valid python " "name.") if values is not None and not isinstance(values, (set, list, tuple)): self._raise(f"In declaration of option '{name}', the 'values' arg must be of type None," f" list, or tuple - not {values}.", exc_type=TypeError) if types is not None and not isinstance(types, (type, set, list, tuple)): self._raise(f"In declaration of option '{name}', the 'types' arg must be None, a type " f"or a tuple - not {types}.", exc_type=TypeError) if types is not None and types is not list and values is not None: self._raise(f"'types' and 'values' were both specified for option '{name}'.") if types is bool: values = (True, False) if not recordable: self._all_recordable = False default_provided = default is not _UNDEFINED if default_provided and default is None: # specifying default=None implies allow_none allow_none = True alias = None if deprecation is not None: if isinstance(deprecation, (list, tuple)): if len(deprecation) != 2: self._raise("deprecation must be None, str, or a tuple or list containing " "(str, str).", RuntimeError) dep, alias = deprecation # [message, alias, display warning (becomes False after first display)] deprecation = [dep, alias, True] else: deprecation = [deprecation, None, True] self._dict[name] = { 'val': default, 'values': values, 'types': types, 'desc': desc, 'upper': upper, 'lower': lower, 'check_valid': check_valid, 'has_been_set': default_provided, 'allow_none': allow_none, 'recordable': recordable, 'deprecation': deprecation, } # If a default is given, check for validity if default_provided: self._assert_valid(name, default)
[docs] def undeclare(self, name): """ Remove entry from the OptionsDictionary, for classes that don't use that option. Parameters ---------- name : str The name of a key, the entry of which will be removed from the internal dictionary. """ if name in self._dict: del self._dict[name]
[docs] def update(self, in_dict): """ Update the internal dictionary with the given one. Parameters ---------- in_dict : dict The incoming dictionary to add to the internal one. """ for name in in_dict: self[name] = in_dict[name]
[docs] def __iter__(self): """ Provide an iterator. Returns ------- iterable iterator over the keys in the dictionary. """ return iter(self._dict)
[docs] def __contains__(self, key): """ Check if the key is in the local dictionary. Parameters ---------- key : str name of the option. Returns ------- bool whether key is in the local dict. """ return key in self._dict
[docs] def __setitem__(self, name, value): """ Set an option in the local dictionary. Parameters ---------- name : str name of the option. value : - value of the option to be value- and type-checked if declared. """ try: meta = self._dict[name] except KeyError: # The key must not have been declared. self._raise(f"Option '{name}' cannot be set because it has not been declared.", exc_type=KeyError) if self._read_only: self._raise(f"Tried to set read-only option '{name}'.", exc_type=KeyError) if meta['deprecation'] is not None: name, meta = self._handle_deprecation(name, meta) self._assert_valid(name, value) meta['val'] = value meta['has_been_set'] = True
[docs] def __getitem__(self, name): """ Get an option from the dict or declared default. Parameters ---------- name : str name of the option. Returns ------- value : - value of the option. """ # If the option has been set in this system, return the set value try: meta = self._dict[name] except KeyError: self._raise(f"Option '{name}' has not been declared.", exc_type=KeyError) if meta['deprecation'] is not None: name, meta = self._handle_deprecation(name, meta) if meta['has_been_set']: return meta['val'] else: self._raise(f"Option '{name}' is required but has not been set.")
[docs] def items(self): """ Yield name and value of options. Yields ------ key : str Name of option. value : int or bool or float or string Value of the option. """ for key, val in self._dict.items(): try: yield key, val['val'] except KeyError: yield key, val['value']
def _handle_deprecation(self, name, meta): """ Update the warning counter and do name translation of deprecated variable if needed. Parameters ---------- name : str Name of the deprecated variable. meta : dict Metadata dictionary corresponding to the deprecated variable. Returns ------- str The variable name, updated to the non-deprecated name if found. dict Metadata dictionary corresponding to either the original variable or to the non-deprecated varsion if found. """ msg, alias, show_warn = meta['deprecation'] if show_warn: warn_deprecation(msg) meta['deprecation'][2] = False # turn off future warnings for this variable if alias: try: meta = self._dict[alias] except KeyError: msg = f"Can't find aliased option '{alias}' for deprecated option '{name}'." self._raise(msg, exc_type=KeyError) name = alias return name, meta