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# -*- coding: utf-8 -*- 

 

u'''(INTERNAL) Nameable class instances. 

 

Classes C{_Named}, C{_NamedDict} and C{_NamedTuple} and several 

subclasses thereof, all with nameable instances. 

 

In addition, the items in a C{_NamedDict} are accessable as attributes 

and the items in a C{_NamedTuple} can be named to be accessable as 

attributes, similar to standard Python C{namedtuple}s. 

 

@see: Module L{pygeodesy.namedTuples} for the C{Named-Tuples}. 

''' 

 

from pygeodesy.basics import isclass, isidentifier, iskeyword, isstr, \ 

issubclassof, _xcopy 

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_, _COLON_, _COLONSPACE_, _COMMASPACE_, \ 

_doesn_t_exist_, _DOT_, _DUNDER_, _dunder_name, \ 

_EQUAL_, _EQUALSPACED_, _exists_, _immutable_, \ 

_name_, _other_, _s_, _SPACE_, _UNDER_, _valid_, _vs_ 

from pygeodesy.lazily import _ALL_DOCS, _ALL_LAZY, _caller3 

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__ = '21.06.27' 

 

_at_ = 'at' 

_del_ = 'del' 

_I_ = 'I' 

_item_ = 'item' 

_MRO_ = 'MRO' 

_O_ = 'O' 

# __DUNDER gets mangled in class 

_name = '_name' 

_Names_ = '_Names_' 

_registered_ = 'registered' # PYCHOK used! 

_Units_ = '_Units_' 

_use_ = 'use' # PYCHOK used! 

 

 

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 __repr__(self): 

'''Default C{repr(self)}. 

''' 

return Fmt.ANGLE(_SPACE_(self, _at_, hex(id(self)))) 

 

def __str__(self): 

'''Default C{str(self)}. 

''' 

return self.named2 

 

def attrs(self, *names, **pairs_kwds): 

'''Join attributes as I{name=value} strings, with C{float}s 

formatted by function L{fstr}. 

 

@arg names: The attribute names (C{str}s). 

@kwarg pairs_kwds: Keyword argument for function L{pairs}, 

except C{B{Nones}=True} to in- or exclude 

missing or C{None}-valued attributes. 

 

@return: All C{name=value} pairs, joined (C{str}). 

 

@see: Functions L{pygeodesy.attrs}. 

''' 

return _COMMASPACE_.join(attrs(self, *names, **pairs_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 subclass thereof). 

''' 

c = _xcopy(self, deep=deep) 

if name: 

c._name = str(name) # c.rename(name) updates all 

return c 

 

def _DOT_(self, *names): 

'''(INTERNAL) Period-join C{self.name} and C{names}. 

''' 

return _DOT_(self.name, *names) 

 

@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 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)) 

t = _COMMASPACE_(repr(m), _SPACE_(_use_, t)) 

n = _DOT_(c, _EQUALSPACED_(_name_, n)) 

raise _NameError(n, txt=t) 

# 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, used 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 other 

 

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: # PYCHOK no cover 

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: # PYCHOK no cover 

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_(', .'.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, *args, **name_only): 

'''New L{_NamedTuple} initialized with B{C{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}. 

''' 

self = tuple.__new__(cls, args) 

if not self._validated: 

self._validate() 

 

n = len(self._Names_) 

if len(args) != n: 

raise LenError(self.__class__, args=len(args), _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{name}}. 

''' 

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 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 _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))) 

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 toRepr(self, prec=6, sep=_COMMASPACE_, **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}). 

 

@return: Tuple items (C{str}). 

''' 

return Fmt.PAREN(self.named, sep.join(pairs(self.items(), prec=prec))) 

 

def toStr(self, prec=6, sep=_COMMASPACE_, **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}). 

 

@return: Tuple items (C{str}). 

''' 

return Fmt.PAREN(sep.join(reprs(self, prec=prec))) 

 

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 callername(up=1, dflt=NN, source=False): 

'''Get the name of the calling 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}). 

 

@return: Name of the non-internal callable (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 (n.startswith(_DUNDER_) or 

not n.startswith(_UNDER_)): 

if source: 

n = NN(n, _AT_, f, _COLON_, str(s)) 

return n 

except (AttributeError, ValueError): # PYCHOK no cover 

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: # PYCHOK no cover 

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, *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) 2016-2021 -- 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