# Coverage for pygeodesy/named.py : 97%

## 414 statements 400 run 14 missing 109 excluded

Hot-keys on this page

r m x p toggle line displays

j k next/prev highlighted chunk

0 (zero) top of page

1 (one) first highlighted chunk

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 | # -*- 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__ = '22.04.22' _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 no cover '''Not implemented.''' return _NotImplemented(self, other) # PYCHOK Python 3.5+ def __matmul__(self, other): # PYCHOK no cover '''Not implemented.''' return _NotImplemented(self, other) # PYCHOK Python 3.5+ def __repr__(self): '''Default C{repr(self)}. ''' return Fmt.ANGLE(_SPACE_(self, _at_, hex(id(self)))) def __rmatmul__(self, other): # PYCHOK no cover '''Not implemented.''' return _NotImplemented(self, other) # PYCHOK Python 3.5+ 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, all positional (C{str}). @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- or 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. ''' d = _xdup(self, **items) if name: d.rename(name=name) return d @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 no cover '''Default C{repr(self)}. ''' return repr(self) def toStr(self, **unused): # PYCHOK no cover '''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, sep=_COMMASPACE_, **kwds): # PYCHOK expected '''(INTERNAL) I{Could be overloaded}. @kwarg kwds: Optional, C{toStr} keyword arguments. @return: C{toStr}() with keyword arguments (as C{str}). ''' t = self.toStr(sep=sep, **kwds).lstrip('([{').rstrip('}])') # if self.name: # t = NN(Fmt.EQUAL(name=repr(self.name)), sep, t) 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 _update(self, updated, *attrs, **prop_ROs): '''(INTERNAL) Zap cached instance attributes and overwrite L{Property_RO} values. ''' if updated: _update_all(self, *attrs) if prop_ROs: d = self.__dict__ for n, v in prop_ROs.items(): if _hasProperty(self, n, Property_RO): d[n] = v else: raise _AssertionError(n, v, txt=repr(self)) 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 __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 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, name, prec, *attrs, **kwds): '''(INTERNAL) Format, used by C{Conic}, C{Ellipsoid}, C{Transform}. ''' t = Fmt.EQUAL(_name_, repr(name or 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[1:] if name is None else 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: Separator to join (C{str}). @kwarg fmt: Optional, C{float} format (C{str}). @return: Tuple items (C{str}). ''' t = pairs(self.items(), prec=prec, fmt=fmt) # if self.name: # t = (Fmt.EQUAL(name=repr(self.name)),) + t return Fmt.PAREN(self.named, sep.join(t)) # XXX (self.classname, sep.join(t)) 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: 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 C{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