# Coverage for pygeodesy/named.py : 93%

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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 | # -*- coding: utf-8 -*- u'''(INTERNAL) Nameable class instances. Classes C{_Named}, C{_NamedDict}, C{_NamedEnum}, C{_NamedEnumItem} and C{_NamedTuple} and several subclasses thereof, all with nameable instances. The items in a C{_NamedDict} are accessable as attributes and the items in a C{_NamedTuple} are named to be accessable as attributes, similar to standard Python C{namedtuple}s. @see: Module L{pygeodesy.namedTuples} for (most of) the C{Named-Tuples}. ''' from pygeodesy.basics import isclass, isidentifier, iskeyword, isstr, \ issubclassof, len2, _xcopy, _xdup from pygeodesy.errors import _AssertionError, _AttributeError, _incompatible, \ _IndexError, _IsnotError, LenError, _NameError, \ _NotImplementedError, _TypeError, _TypesError, \ _ValueError, UnitError, _xkwds, _xkwds_popitem from pygeodesy.interns import NN, _at_, _AT_, _COLON_, _COLONSPACE_, _COMMASPACE_, \ _doesn_t_exist_, _DOT_, _DUNDER_, _dunder_name, \ _EQUAL_, _EQUALSPACED_, _exists_, _I_, _immutable_, \ _name_, _not_, _O_, _other_, _s_, _SPACE_, _std_, \ _UNDER_, _valid_, _vs_ from pygeodesy.lazily import _ALL_DOCS, _ALL_LAZY, _caller3, _getenv from pygeodesy.props import deprecated_method, _hasProperty, Property_RO, \ property_doc_, property_RO, _update_all from pygeodesy.streprs import attrs, Fmt, pairs, reprs, unstr __all__ = _ALL_LAZY.named __version__ = '22.01.20' _COMMASPACEDOT_ = _COMMASPACE_ + _DOT_ _del_ = 'del' _item_ = 'item' _MRO_ = 'MRO' # __DUNDER gets mangled in class _name = '_name' _Names_ = '_Names_' _registered_ = 'registered' # PYCHOK used! _std_NotImplemented = _getenv('PYGEODESY_NOTIMPLEMENTED', NN).lower() == _std_ _Units_ = '_Units_' def _xjoined_(prefix, name): '''(INTERNAL) Join C{pref} and non-empty C{name}. ''' return _SPACE_(prefix, repr(name)) if name and prefix else (prefix or name) def _xnamed(inst, name, force=False): '''(INTERNAL) Set the instance' C{.name = B{name}}. @arg inst: The instance (C{_Named}). @arg name: The name (C{str}). @kwarg force: Force name change (C{bool}). @return: The B{C{inst}}, named if B{C{force}}d or not named before. ''' if name and isinstance(inst, _Named): if not inst.name: inst.name = name elif force: inst.rename(name) return inst def _xother3(inst, other, name=_other_, up=1, **name_other): '''(INTERNAL) Get C{name} and C{up} for a named C{other}. ''' if name_other: # and not other and len(name_other) == 1 name, other = _xkwds_popitem(name_other) elif other and len(other) == 1: other = other[0] else: raise _AssertionError(name, other, txt=classname(inst, prefixed=True)) return other, name, up def _xotherError(inst, other, name=_other_, up=1): '''(INTERNAL) Return a C{_TypeError} for an incompatible, named C{other}. ''' n = _callname(name, classname(inst, prefixed=True), inst.name, up=up + 1) return _TypeError(name, other, txt=_incompatible(n)) def _xvalid(name, _OK=False): '''(INTERNAL) Check valid attribute name C{name}. ''' return True if (name and isstr(name) and name != _name_ and (_OK or not name.startswith(_UNDER_)) and (not iskeyword(name)) and isidentifier(name)) else False class _Dict(dict): '''(INTERNAL) An C{dict} with both key I{and} attribute access to the C{dict} items. ''' def __getattr__(self, name): '''Get an attribute or item by B{C{name}}. ''' try: return self[name] except KeyError: pass name = _DOT_(self.__class__.__name__, name) raise _AttributeError(item=name, txt=_doesn_t_exist_) def __repr__(self): '''Default C{repr(self)}. ''' return self.toRepr() def __str__(self): '''Default C{str(self)}. ''' return self.toStr() def set_(self, **attrs): # PYCHOK signature '''Add one or several new items or replace existing ones. @kwarg attrs: One or more C{name=value} pairs. ''' dict.update(self, attrs) def toRepr(self, prec=6, fmt=Fmt.F): # PYCHOK signature '''Like C{repr(dict)} but with C{name} prefix and with C{floats} formatting by C{fstr}. ''' t = pairs(self.items(), prec=prec, fmt=fmt, sep=_EQUAL_) n = self.get(_name_, classname(self)) return Fmt.PAREN(n, _COMMASPACE_.join(sorted(t))) def toStr(self, prec=6, fmt=Fmt.F): # PYCHOK signature '''Like C{str(dict)} but with C{floats} formatting by C{fstr}. ''' t = pairs(self.items(), prec=prec, fmt=fmt, sep=_COLONSPACE_) return Fmt.CURLY(_COMMASPACE_.join(sorted(t))) class _Named(object): '''(INTERNAL) Root class for named objects. ''' _name = NN # name (C{str}) _classnaming = False # prefixed (C{bool}) def __imatmul__(self, other): # PYCHOK Python 3.5+ '''Not implemented.''' return _NotImplemented(self, other) def __matmul__(self, other): # PYCHOK Python 3.5+ '''Not implemented.''' return _NotImplemented(self, other) def __repr__(self): '''Default C{repr(self)}. ''' return Fmt.ANGLE(_SPACE_(self, _at_, hex(id(self)))) def __rmatmul__(self, other): # PYCHOK Python 3.5+ '''Not implemented.''' return _NotImplemented(self, other) def __str__(self): '''Default C{str(self)}. ''' return self.named2 def attrs(self, *names, **sep_COMMASPACE_Nones_True_pairs_kwds): '''Join named attributes as I{name=value} strings, with C{float}s formatted by function L{pygeodesy.fstr}. @arg names: The attribute names (C{str}s). @kwarg sep_COMMASPACE_Nones_True_pairs_kwds: Keyword argument for function L{pygeodesy.pairs}, except C{B{sep}=", "} and C{B{Nones}=True} to in-/exclude missing or C{None}-valued attributes. @return: All C{name=value} pairs, joined by B{C{sep}} (C{str}). @see: Functions L{pygeodesy.attrs}, L{pygeodesy.fstr} and L{pygeodesy.pairs}. ''' def _sep_kwds(sep=_COMMASPACE_, **kwds): return sep, kwds sep, kwds = _sep_kwds(**sep_COMMASPACE_Nones_True_pairs_kwds) return sep.join(attrs(self, *names, **kwds)) @Property_RO def classname(self): '''Get this object's C{[module.]class} name (C{str}), see property C{.classnaming} and function C{classnaming}. ''' return classname(self, prefixed=self._classnaming) @property_doc_(''' the class naming (C{bool}).''') def classnaming(self): '''Get the class naming (C{bool}), see function C{classnaming}. ''' return self._classnaming @classnaming.setter # PYCHOK setter! def classnaming(self, prefixed): '''Set the class naming for C{[module.].class} names. @arg prefixed: Include the module name (C{bool}). ''' self._classnaming = bool(prefixed) def classof(self, *args, **kwds): '''Create another instance of this very class. @arg args: Optional, positional arguments. @kwarg kwds: Optional, keyword arguments. @return: New instance (B{self.__class__}). ''' return _xnamed(self.__class__(*args, **kwds), self.name) def copy(self, deep=False, name=NN): '''Make a shallow or deep copy of this instance. @kwarg deep: If C{True} make a deep, otherwise a shallow copy (C{bool}). @kwarg name: Optional, non-empty name (C{str}). @return: The copy (C{This class} or sub-class thereof). ''' c = _xcopy(self, deep=deep) if name: c._name = name # # c.rename(name) _update_all! return c def _DOT_(self, *names): '''(INTERNAL) Period-join C{self.name} and C{names}. ''' return _DOT_(self.name, *names) def dup(self, name=NN, **items): '''Duplicate this instance, replacing some items. @kwarg name: Optional new name (C{str}). @kwarg items: Attributes to be changed (C{any}). @return: The duplicate (C{This class} or sub-class thereof). @raise AttributeError: Some B{C{items}} invalid. ''' return _xdup(self, name=name, **items) @property_doc_(''' the name (C{str}).''') def name(self): '''Get the name (C{str}). ''' return self._name @name.setter # PYCHOK setter! def name(self, name): '''Set the name. @arg name: New name (C{str}). @raise NameError: Can't rename, use method L{rename}. ''' m, n = self._name, str(name) if not m: self._name = n elif n != m: n = repr(n) c = self.classname t = _DOT_(c, Fmt.PAREN(self.rename.__name__, n)) m = Fmt.PAREN(_SPACE_('was', repr(m))) n = _DOT_(c, _EQUALSPACED_(_name_, n)) n = _SPACE_(n, m) raise _NameError(_SPACE_('use', t), txt=_not_(n)) # to set the name from a sub-class, use # self.name = name or # _Named.name.fset(self, name), but NOT # _Named(self).name = name @Property_RO def named(self): '''Get the name I{or} class name or C{""} (C{str}). ''' return self.name or self.classname @Property_RO def named2(self): '''Get the C{class} name I{and/or} the name or C{""} (C{str}). ''' return _xjoined_(self.classname, self.name) @Property_RO def named3(self): '''Get the I{prefixed} C{class} name I{and/or} the name or C{""} (C{str}). ''' return _xjoined_(classname(self, prefixed=True), self.name) @Property_RO def named4(self): '''Get the C{package.module.class} name I{and/or} the name or C{""} (C{str}). ''' return _xjoined_(_DOT_(self.__module__, self.__class__.__name__), self.name) def rename(self, name): '''Change the name. @arg name: The new name (C{str}). @return: The old name (C{str}). ''' m, n = self._name, str(name) if n != m: self._name = n _update_all(self) return m def toRepr(self, **unused): # PYCHOK expected '''Default C{repr(self)}. ''' return repr(self) def toStr(self, **unused): # PYCHOK expected '''Default C{str(self)}. ''' return str(self) @deprecated_method def toStr2(self, **kwds): # PYCHOK no cover '''DEPRECATED, use method C{toRepr}.''' return self.toRepr(**kwds) def _xnamed(self, inst, name=NN, force=False): '''(INTERNAL) Set the instance' C{.name = self.name}. @arg inst: The instance (C{_Named}). @kwarg name: Optional name, overriding C{self.name} (C{str}). @kwarg force: Force name change (C{bool}). @return: The B{C{inst}}, named if not named before. ''' return _xnamed(inst, name or self.name, force=force) def _xrenamed(self, inst): '''(INTERNAL) Rename the instance' C{.name = self.name}. @arg inst: The instance (C{_Named}). @return: The B{C{inst}}, named if not named before. ''' if not isinstance(inst, _Named): raise _IsnotError(_valid_, inst=inst) inst.rename(self.name) return inst class _NamedBase(_Named): '''(INTERNAL) Base class with name. ''' def __repr__(self): '''Default C{repr(self)}. ''' return self.toRepr() def __str__(self): '''Default C{str(self)}. ''' return self.toStr() # def notImplemented(self, attr): # '''Raise error for a missing method, function or attribute. # # @arg attr: Attribute name (C{str}). # # @raise NotImplementedError: No such attribute. # ''' # c = self.__class__.__name__ # return NotImplementedError(_DOT_(c, attr)) def others(self, *other, **name_other_up): # see .points.LatLon_.others '''Refined class comparison, invoked as C{.others(other=other)}, C{.others(name=other)} or C{.others(other, name='other')}. @arg other: The other instance (any C{type}). @kwarg name_other_up: Overriding C{name=other} and C{up=1} keyword arguments. @return: The B{C{other}} iff compatible with this instance's C{class} or C{type}. @raise TypeError: Mismatch of the B{C{other}} and this instance's C{class} or C{type}. ''' if other: # most common, just one arg B{C{other}} other0 = other[0] if isinstance(other0, self.__class__) or \ isinstance(self, other0.__class__): return other0 other, name, up = _xother3(self, other, **name_other_up) if isinstance(self, other.__class__) or \ isinstance(other, self.__class__): return _xnamed(other, name) raise _xotherError(self, other, name=name, up=up + 1) def toRepr(self, **kwds): # PYCHOK expected '''(INTERNAL) I{Could be overloaded}. @kwarg kwds: Optional, keyword arguments. @return: C{toStr}() with keyword arguments (as C{str}). ''' t = self.toStr(**kwds).lstrip('([{').rstrip('}])') return Fmt.PAREN(self.classname, t) # XXX (self.named, t) # def toRepr(self, **kwds) # if kwds: # s = NN.join(reprs((self,), **kwds)) # else: # super().__repr__ only for Python 3+ # s = super(self.__class__, self).__repr__() # return Fmt.PAREN(self.named, s) # clips(s) def toStr(self, **kwds): # PYCHOK no cover '''(INTERNAL) I{Must be overloaded}, see function C{notOverloaded}. ''' notOverloaded(self, **kwds) # def toStr(self, **kwds): # if kwds: # s = NN.join(strs((self,), **kwds)) # else: # super().__str__ only for Python 3+ # s = super(self.__class__, self).__str__() # return s def _overwrite(self, **name_values): '''(INTERNAL) Overwrite L{Property_RO} values. ''' d = self.__dict__ for n, v in name_values.items(): if _hasProperty(self, n, Property_RO): d[n] = v else: raise _AssertionError(n, v, txt=repr(self)) def _update(self, updated, *attrs): '''(INTERNAL) Zap cached instance attributes. ''' if updated: _update_all(self, *attrs) class _NamedDict(_Dict, _Named): '''(INTERNAL) Named C{dict} with key I{and} attribute access to the items. ''' def __init__(self, *args, **kwds): if args: # args override kwds if len(args) != 1: t = unstr(self.classname, *args, **kwds) # PYCHOK no cover raise _ValueError(args=len(args), txt=t) kwds = _xkwds(dict(args[0]), **kwds) if _name_ in kwds: _Named.name.fset(self, kwds.pop(_name_)) # see _Named.name _Dict.__init__(self, kwds) def __delattr__(self, name): '''Delete an attribute or item by B{C{name}}. ''' if name in _Dict.keys(self): _Dict.pop(name) elif name in (_name_, _name): # _Dict.__setattr__(self, name, NN) _Named.rename(self, NN) else: _Dict.__delattr__(self, name) def __getattr__(self, name): '''Get an attribute or item by B{C{name}}. ''' try: return self[name] except KeyError: if name == _name_: return _Named.name.fget(self) raise _AttributeError(item=self._DOT_(name), txt=_doesn_t_exist_) def __getitem__(self, key): '''Get the value of an item by B{C{key}}. ''' if key == _name_: raise KeyError(Fmt.SQUARE(self.classname, key)) return _Dict.__getitem__(self, key) def __repr__(self): '''Default C{repr(self)}. ''' return self.toRepr() def __setattr__(self, name, value): '''Set attribute or item B{C{name}} to B{C{value}}. ''' if name in _Dict.keys(self): _Dict.__setitem__(self, name, value) # self[name] = value else: _Dict.__setattr__(self, name, value) def __setitem__(self, key, value): '''Set item B{C{key}} to B{C{value}}. ''' if key == _name_: raise KeyError(_EQUAL_(Fmt.SQUARE(self.classname, key), repr(value))) _Dict.__setitem__(self, key, value) def __str__(self): '''Default C{str(self)}. ''' return self.toStr() def toRepr(self, prec=6, fmt=Fmt.F): # PYCHOK signature '''Like C{repr(dict)} but with C{name} prefix and with C{floats} formatting by C{fstr}. ''' t = pairs(self.items(), prec=prec, fmt=fmt, sep=_EQUAL_) return Fmt.PAREN(self.name, _COMMASPACE_.join(sorted(t))) def toStr(self, prec=6, fmt=Fmt.F): # PYCHOK signature '''Like C{str(dict)} but with C{floats} formatting by C{fstr}. ''' t = pairs(self.items(), prec=prec, fmt=fmt, sep=_COLONSPACE_) return Fmt.CURLY(_COMMASPACE_.join(sorted(t))) class _NamedEnum(_NamedDict): '''(INTERNAL) Enum-like C{_NamedDict} with attribute access restricted to valid keys. ''' _item_Classes = () def __init__(self, Class, *Classes, **name): '''New C{_NamedEnum}. @arg Class: Initial class or type acceptable as items values (C{type}). @arg Classes: Additional, acceptable classes or C{type}s. ''' self._item_Classes = (Class,) + Classes n = name.get(_name_, NN) or NN(Class.__name__, _s_) if n and _xvalid(n, _OK=True): _Named.name.fset(self, n) # see _Named.name def __getattr__(self, name): '''Get the value of an attribute or item by B{C{name}}. ''' try: return self[name] except KeyError: if name == _name_: return _NamedDict.name.fget(self) raise _AttributeError(item=self._DOT_(name), txt=_doesn_t_exist_) def __repr__(self): '''Default C{repr(self)}. ''' return self.toRepr() def __str__(self): '''Default C{str(self)}. ''' return self.toStr() def _assert(self, **kwds): '''(INTERNAL) Check attribute name against given, registered name. ''' for n, v in kwds.items(): if isinstance(v, _LazyNamedEnumItem): # property assert n is v.name # assert not hasattr(self.__class__, n) setattr(self.__class__, n, v) elif isinstance(v, self._item_Classes): # PYCHOK no cover assert self[n] is v and getattr(self, n) \ and self.find(v) == n else: raise _TypeError(v, name=n) def find(self, item, dflt=None): '''Find a registered item. @arg item: The item to look for (any C{type}). @kwarg dflt: Value to return if not found (any C{type}). @return: The B{C{item}}'s name if found (C{str}), or C{{dflt}} if there is no such I{registered} B{C{item}}. ''' for k, v in _Dict.items(self): # XXX not self.items() if v is item: return k return dflt def get(self, name, dflt=None): '''Get the value of a I{registered} item. @arg name: The name of the item (C{str}). @kwarg dflt: Value to return (any C{type}). @return: The item with B{C{name}} if found, or B{C{dflt}} if there is no item I{registered} with that B{C{name}}. ''' # getattr needed to instantiate L{_LazyNamedEnumItem} return getattr(self, name, dflt) def items(self, all=False): '''Yield all or only the I{registered} items. @kwarg all: Use C{True} to yield {all} items or C{False} for only the currently I{registered} ones. ''' if all: # instantiate any remaining L{_LazyNamedEnumItem}s, # removing the L{_LazyNamedEnumItem} from the class for n in tuple(n for n, p in self.__class__.__dict__.items() if isinstance(p, _LazyNamedEnumItem)): _ = getattr(self, n) return _Dict.items(self) def keys(self, all=False): '''Yield the keys of all or only the I{registered} items. @kwarg all: Use C{True} to yield {all} item keys or C{False} for only the currently I{registered} ones. ''' for k, _ in self.items(all=all): yield k def popitem(self): '''Remove I{an, any} curretly I{registed} item. @return: The removed item. ''' return self._zapitem(*_Dict.pop(self)) def register(self, item): '''Registed a new item. @arg item: The item (any C{type}). @return: The item name (C{str}). @raise NameError: An B{C{item}} already registered with that name or the B{C{item}} has no, an empty or an invalid name. @raise TypeError: The B{C{item}} type invalid. ''' try: n = item.name if not (n and isstr(n) and isidentifier(n)): raise ValueError except (AttributeError, ValueError, TypeError) as x: raise _NameError(_DOT_(_item_, _name_), item, txt=str(x)) if n in self: raise _NameError(self._DOT_(n), item, txt=_exists_) if not (self._item_Classes and isinstance(item, self._item_Classes)): raise _TypesError(self._DOT_(n), item, *self._item_Classes) self[n] = item def unregister(self, name_or_item): '''Remove a I{registered} item. @arg name_or_item: Name (C{str}) or the item (any C{type}). @return: The unregistered item. @raise NameError: No item with that B{C{name}}. @raise ValueError: No such item. ''' if isstr(name_or_item): name = name_or_item else: name = self.find(name_or_item) try: item = _Dict.pop(self, name) except KeyError: raise _NameError(item=self._DOT_(name), txt=_doesn_t_exist_) return self._zapitem(name, item) pop = unregister def toRepr(self, prec=6, fmt=Fmt.F, sep=',\n', **all): # PYCHOK _NamedDict '''Like C{repr(dict)} but with C{name} and C{floats} formatting by C{fstr}. ''' t = sorted((self._DOT_(n), v) for n, v in self.items(**all)) return sep.join(pairs(t, prec=prec, fmt=fmt, sep=_COLONSPACE_)) def toStr(self, *unused, **all): # PYCHOK _NamedDict '''Like C{str(dict)} but with C{floats} formatting by C{fstr}. ''' return self._DOT_(_COMMASPACEDOT_.join(sorted(self.keys(**all)))) def values(self, all=False): '''Yield the value of all or only the I{registered} items. @kwarg all: Use C{True} to yield {all} item values or C{False} for only the currently registered ones. ''' for _, v in self.items(all=all): yield v def _zapitem(self, name, item): # remove _LazyNamedEnumItem property value if still present if self.__dict__.get(name, None) is item: self.__dict__.pop(name) # [name] = None item._enum = None return item class _LazyNamedEnumItem(property_RO): # XXX or descriptor? '''(INTERNAL) Lazily instantiated L{_NamedEnumItem}. ''' pass def _lazyNamedEnumItem(name, *args, **kwds): '''(INTERNAL) L{_LazyNamedEnumItem} property-like factory. @see: Luciano Ramalho, "Fluent Python", page 636, O'Reilly, 2016, "Coding a Property Factory", especially Example 19-24. ''' def _fget(inst): # assert isinstance(inst, _NamedEnum) try: # get the item from the instance' __dict__ item = inst.__dict__[name] except KeyError: # instantiate an _NamedEnumItem, it self-registers item = inst._Lazy(*args, **_xkwds(kwds, name=name)) # assert inst[name] is item # MUST be registered # store the item in the instance' __dict__ inst.__dict__[name] = item # remove the property from the registry class, such that # (a) the property no longer overrides the instance' item # in inst.__dict__ and (b) _NamedEnum.items(all=True) only # sees un-instantiated ones to be instantiated p = getattr(inst.__class__, name, None) if isinstance(p, _LazyNamedEnumItem): delattr(inst.__class__, name) # assert isinstance(item, _NamedEnumItem) return item p = _LazyNamedEnumItem(_fget) p.name = name return p class _NamedEnumItem(_NamedBase): '''(INTERNAL) Base class for items in a C{_NamedEnum} registery. ''' _enum = None def __ne__(self, other): '''Compare this and an other item. @return: C{True} if different, C{False} otherwise. ''' return not self.__eq__(other) def _instr(self, prec, *attrs, **kwds): '''(INTERNAL) Format, used by C{Conic}, C{Ellipsoid}, C{Transform}. ''' t = Fmt.EQUAL(_name_, repr(self.name)), if attrs: t += pairs(((a, getattr(self, a)) for a in attrs), prec=prec, ints=True) if kwds: t += pairs(kwds, prec=prec) return _COMMASPACE_.join(t) @property_doc_(''' the I{registered} name (C{str}).''') def name(self): '''Get the I{registered} name (C{str}). ''' return self._name @name.setter # PYCHOK setter! def name(self, name): '''Set the name, unless already registered. @arg name: New name (C{str}). ''' if self._enum: raise _NameError(str(name), self, txt=_registered_) # XXX _TypeError self._name = str(name) def _register(self, enum, name): '''(INTERNAL) Add this item as B{C{enum.name}}. @note: Don't register if name is empty or doesn't start with a letter. ''' if name and _xvalid(name, _OK=True): self.name = name if name[:1].isalpha(): # '_...' not registered enum.register(self) self._enum = enum def unregister(self): '''Remove this instance from its C{_NamedEnum} registry. @raise AssertionError: Mismatch of this and registered item. @raise NameError: This item is unregistered. ''' enum = self._enum if enum and self.name and self.name in enum: item = enum.unregister(self.name) if item is not self: t = _SPACE_(repr(item), _vs_, repr(self)) # PYCHOK no cover raise _AssertionError(t) class _NamedTuple(tuple, _Named): '''(INTERNAL) Base for named C{tuple}s with both index I{and} attribute name access to the items. @note: This class is similar to Python's C{namedtuple}, but statically defined, lighter and limited. ''' _iteration = None # Iteration number (C{int}) or C{None} _Names_ = () # item names, non-identifier, no leading underscore '''Tuple specifying the C{name} of each C{Named-Tuple} item. @note: Specify at least 2 item names. ''' _Units_ = () # .units classes '''Tuple defining the C{units} of the value of each C{Named-Tuple} item. @note: The C{len(_Units_)} must match C{len(_Names_)}. ''' _validated = False # set to True I{per sub-class!} def __new__(cls, arg, *args, **name_only): '''New L{_NamedTuple} initialized with B{C{positional}} arguments. @arg arg: Tuple items (C{tuple}, C{list}, ...) or first tuple item of several more in other positional arguments. @arg args: Tuple items (C{any}), all positional arguments. @kwarg name_only: Only C{B{name}='name'} is used, all other keyword arguments are I{silently} ignored. @raise LenError: Unequal number of positional arguments and number of item C{_Names_} or C{_Units_}. @raise TypeError: The C{_Names_} or C{_Units_} attribute is not a C{tuple} of at least 2 items. @raise ValueError: Item name is not a C{str} or valid C{identifier} or starts with C{underscore}. ''' n, args = len2(((arg,) + args) if args else arg) self = tuple.__new__(cls, args) if not self._validated: self._validate() N = len(self._Names_) if n != N: raise LenError(self.__class__, args=n, _Names_=N) if name_only: # name=NN n = name_only.get(_name_, NN) if n: self.name = n return self def __delattr__(self, name): '''Delete an attribute by B{C{name}}. @note: Items can not be deleted. ''' if name in self._Names_: raise _TypeError(_del_, _DOT_(self.classname, name), txt=_immutable_) elif name in (_name_, _name): _Named.__setattr__(self, name, NN) # XXX _Named.name.fset(self, NN) else: tuple.__delattr__(self, name) def __getattr__(self, name): '''Get the value of an attribute or item by B{C{name}}. ''' try: return tuple.__getitem__(self, self._Names_.index(name)) except IndexError: raise _IndexError(_DOT_(self.classname, Fmt.ANGLE(_name_)), name) except ValueError: return tuple.__getattribute__(self, name) def __getitem__(self, item): # index, slice, etc. '''Get the value of an item by B{C{index}}. ''' return tuple.__getitem__(self, item) def __repr__(self): '''Default C{repr(self)}. ''' return self.toRepr() def __setattr__(self, name, value): '''Set attribute or item B{C{name}} to B{C{value}}. ''' if name in self._Names_: raise _TypeError(_DOT_(self.classname, name), value, txt=_immutable_) elif name in (_name_, _name): _Named.__setattr__(self, name, value) # XXX _Named.name.fset(self, value) else: tuple.__setattr__(self, name, value) def __str__(self): '''Default C{repr(self)}. ''' return self.toStr() def dup(self, name=NN, **items): '''Duplicate this tuple replacing one or more items. @kwarg name: Optional new name (C{str}). @kwarg items: Items to be replaced (C{name=value} pairs), if any. @return: A copy of this tuple with B{C{items}}. @raise NameError: Some B{C{items}} invalid. ''' tl = list(self) if items: _ix = self._Names_.index try: for n, v in items.items(): tl[_ix(n)] = v except ValueError: # bad item name raise _NameError(_DOT_(self.classname, n), v, this=self) return self.classof(*tl, name=name or self.name) def items(self): '''Yield the items, each as a C{(name, value)} pair (C{2-tuple}). @see: Method C{.units}. ''' for n, v in zip(self._Names_, self): yield n, v iteritems = items @property_RO def iteration(self): '''Get the iteration number (C{int}) or C{None} if not available/applicable. ''' return self._iteration def toRepr(self, prec=6, sep=_COMMASPACE_, fmt=Fmt.F, **unused): # PYCHOK signature '''Return this C{Named-Tuple} items as C{name=value} string(s). @kwarg prec: The C{float} precision, number of decimal digits (0..9). Trailing zero decimals are stripped for B{C{prec}} values of 1 and above, but kept for negative B{C{prec}} values. @kwarg sep: Optional separator to join (C{str}). @kwarg fmt: Optional, C{float} format (C{str}). @return: Tuple items (C{str}). ''' return Fmt.PAREN(self.named, sep.join(pairs(self.items(), prec=prec, fmt=fmt))) def toStr(self, prec=6, sep=_COMMASPACE_, fmt=Fmt.F, **unused): # PYCHOK signature '''Return this C{Named-Tuple} items as string(s). @kwarg prec: The C{float} precision, number of decimal digits (0..9). Trailing zero decimals are stripped for B{C{prec}} values of 1 and above, but kept for negative B{C{prec}} values. @kwarg sep: Optional separator to join (C{str}). @kwarg fmt: Optional, C{float} format (C{str}). @return: Tuple items (C{str}). ''' return Fmt.PAREN(sep.join(reprs(self, prec=prec, fmt=fmt))) def toUnits(self, Error=UnitError): # overloaded in .frechet, .hausdorff '''Return a copy of this C{Named-Tuple} with each item value wrapped as an instance of its L{units} class. @kwarg Error: Error to raise for L{units} issues (C{UnitError}). @return: A duplicate of this C{Named-Tuple} (C{C{Named-Tuple}}). @raise Error: Invalid C{Named-Tuple} item or L{units} class. ''' t = (v for _, v in self.units(Error=Error)) return self.classof(*tuple(t)) def units(self, Error=UnitError): '''Yield the items, each as a C{(name, value}) pair (C{2-tuple}) with the value wrapped as an instance of its L{units} class. @kwarg Error: Error to raise for L{units} issues (C{UnitError}). @raise Error: Invalid C{Named-Tuple} item or L{units} class. @see: Method C{.items}. ''' for n, v, U in zip(self._Names_, self, self._Units_): if not (v is None or U is None or (isclass(U) and isinstance(v, U) and hasattr(v, _name_) and v.name == n)): # PYCHOK indent v = U(v, name=n, Error=Error) yield n, v iterunits = units def _validate(self, _OK=False): # see .EcefMatrix '''(INTERNAL) One-time check of C{_Names_} and C{_Units_} for each C{_NamedUnit} I{sub-class separately}. ''' ns = self._Names_ if not (isinstance(ns, tuple) and len(ns) > 1): # XXX > 0 raise _TypeError(_DOT_(self.classname, _Names_), ns) for i, n in enumerate(ns): if not _xvalid(n, _OK=_OK): t = Fmt.SQUARE(_Names_=i) # PYCHOK no cover raise _ValueError(_DOT_(self.classname, t), n) us = self._Units_ if not isinstance(us, tuple): raise _TypeError(_DOT_(self.classname, _Units_), us) if len(us) != len(ns): raise LenError(self.__class__, _Units_=len(us), _Names_=len(ns)) for i, u in enumerate(us): if not (u is None or callable(u)): t = Fmt.SQUARE(_Units_=i) # PYCHOK no cover raise _TypeError(_DOT_(self.classname, t), u) self.__class__._validated = True def _xtend(self, xTuple, *items): '''(INTERNAL) Extend this C{Named-Tuple} with C{items} to an other B{C{xTuple}}. ''' if (issubclassof(xTuple, _NamedTuple) and (len(self._Names_) + len(items)) == len(xTuple._Names_) and self._Names_ == xTuple._Names_[:len(self)]): return self._xnamed(xTuple(self + items)) # *(self + items) c = NN(self.classname, repr(self._Names_)) # PYCHOK no cover x = NN(xTuple.__name__, repr(xTuple._Names_)) # PYCHOK no cover raise TypeError(_SPACE_(c, _vs_, x)) def callername(up=1, dflt=NN, source=False, underOK=False): '''Get the name of the invoking callable. @kwarg up: Number of call stack frames up (C{int}). @kwarg dflt: Default return value (C{any}). @kwarg source: Include source file name and line number (C{bool}). @kwarg underOK: Private, internal callables are OK (C{bool}). @return: The callable name (C{str}) or B{C{dflt}} if none found. ''' try: # see .lazily._caller3 for u in range(up, up + 32): n, f, s = _caller3(u) if n and (underOK or n.startswith(_DUNDER_) or not n.startswith(_UNDER_)): if source: n = NN(n, _AT_, f, _COLON_, str(s)) return n except (AttributeError, ValueError): pass return dflt def _callname(name, class_name, self_name, up=1): '''(INTERNAL) Assemble the name for an invokation. ''' n, c = class_name, callername(up=up + 1) if c: n = _DOT_(n, Fmt.PAREN(c, name)) if self_name: n = _SPACE_(n, repr(self_name)) return n def classname(inst, prefixed=None): '''Return the instance' class name optionally prefixed with the module name. @arg inst: The object (any C{type}). @kwarg prefixed: Include the module name (C{bool}), see function C{classnaming}. @return: The B{C{inst}}'s C{[module.]class} name (C{str}). ''' if prefixed is None: prefixed = getattr(inst, classnaming.__name__, prefixed) return modulename(inst.__class__, prefixed=prefixed) def classnaming(prefixed=None): '''Get/set the default class naming for C{[module.]class} names. @kwarg prefixed: Include the module name (C{bool}). @return: Previous class naming setting (C{bool}). ''' t = _Named._classnaming if prefixed in (True, False): _Named._classnaming = prefixed return t def modulename(clas, prefixed=None): # in .basics._xversion '''Return the class name optionally prefixed with the module name. @arg clas: The class (any C{class}). @kwarg prefixed: Include the module name (C{bool}), see function C{classnaming}. @return: The B{C{class}}'s C{[module.]class} name (C{str}). ''' try: n = clas.__name__ except AttributeError: n = '__name__' # _DUNDER_(NN, _name_, NN) if prefixed or (classnaming() if prefixed is None else False): try: m = clas.__module__.rsplit(_DOT_, 1) n = _DOT_.join(m[1:] + [n]) except AttributeError: pass return n def nameof(inst): '''Get the name of an instance. @arg inst: The object (any C{type}). @return: The instance' name (C{str}) or C{""}. ''' n = getattr(inst, _name_, NN) if not n: # and isinstance(inst, property): try: n = inst.fget.__name__ except AttributeError: n = NN return n def _notError(inst, name, args, kwds): # PYCHOK no cover '''(INTERNAL) Format an error message. ''' n = _DOT_(classname(inst, prefixed=True), _dunder_name(name, name)) m = _COMMASPACE_.join(modulename(c, prefixed=True) for c in inst.__class__.__mro__[1:-1]) return _COMMASPACE_(unstr(n, *args, **kwds), Fmt.PAREN(_MRO_, m)) def _NotImplemented(inst, *other, **kwds): '''(INTERNAL) Raise a C{__special__} error or return C{NotImplemented}, but only if env variable PYGEODESY_NOTIMPLEMENTED=std. ''' if _std_NotImplemented: return NotImplemented n = _DOT_(classname(inst), callername(up=2, underOK=True)) # source=True raise _NotImplementedError(unstr(n, *other, **kwds), txt=repr(inst)) def notImplemented(inst, *args, **kwds): # PYCHOK no cover '''Raise a C{NotImplementedError} for a missing method or property. @arg inst: Instance (C{any}). @arg args: Method or property positional arguments (any C{type}s). @arg kwds: Method or property keyword arguments (any C{type}s). ''' n = kwds.pop(callername.__name__, NN) or callername(up=2) t = _notError(inst, n, args, kwds) raise _NotImplementedError(t, txt=notImplemented.__name__.replace(_I_, ' i')) def notOverloaded(inst, *args, **kwds): # PYCHOK no cover '''Raise an C{AssertionError} for a method or property not overloaded. @arg inst: Instance (C{any}). @arg args: Method or property positional arguments (any C{type}s). @arg kwds: Method or property keyword arguments (any C{type}s). ''' n = kwds.pop(callername.__name__, NN) or callername(up=2) t = _notError(inst, n, args, kwds) raise _AssertionError(t, txt=notOverloaded.__name__.replace(_O_, ' o')) def _Pass(arg, **unused): # PYCHOK no cover '''(INTERNAL) I{Pass-thru} class for C{_NamedTuple._Units_}. ''' return arg __all__ += _ALL_DOCS(_Named, _NamedBase, # _NamedDict, _NamedEnum, _NamedEnumItem, _NamedTuple) # **) MIT License # # Copyright (C) 2016-2022 -- mrJean1 at Gmail -- All Rights Reserved. # # Permission is hereby granted, free of charge, to any person obtaining a # copy of this software and associated documentation files (the "Software"), # to deal in the Software without restriction, including without limitation # the rights to use, copy, modify, merge, publish, distribute, sublicense, # and/or sell copies of the Software, and to permit persons to whom the # Software is furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included # in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR # OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR # OTHER DEALINGS IN THE SOFTWARE. # % env PYGEODESY_FOR_DOCS=1 python -m pygeodesy.named # all 71 locals OK