# Coverage for pygeodesy/lazily.py : 93%

## 128 statements 119 run 9 missing 29 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 | # -*- coding: utf-8 -*- u'''Lazily import C{pygeodesy} modules and attributes, based on U{lazy_import<https://modutil.ReadTheDocs.io/en/latest/#lazy_import>} from I{Brett Cannon}'s U{modutil<https://PyPI.org/project/modutil>}. C{Lazy import} is I{supported only for }U{Python 3.7+ <https://Snarky.CA/lazy-importing-in-python-3-7>} and is I{enabled by default in }U{PyGeodesy 18.11.10+<https://PyPI.org/project/PyGeodesy>} I{ and later}. To I{enable} C{lazy import}, set C{env} variable C{PYGEODESY_LAZY_IMPORT} to C{1}, C{2}, C{3} or higher prior to C{import pygeodesy}. To I{disable} C{lazy import}, set C{env} variable C{PYGEODESY_LAZY_IMPORT} to C{0} or an empty string. Use C{2} or higher to print a message for each lazily imported module and attribute, similar to C{env} variable C{PYTHONVERBOSE} showing imports. Using C{3} or higher also shows the importing file name and line number. @note: C{Lazy import} applies only to top-level modules of C{pygeodesy}. A C{lazy import} of a top-level module inherently loads all sub-modules imported by that top-level module. ''' from pygeodesy.interns import MISSING, NN, __all__ as _interns_a_l_l_, \ _areaOf_, _attribute_, _COMMASPACE_, \ _doesn_t_exist_, _DOT_, _dunder_name, \ _enabled_, _EQUALSPACED_, _immutable_, \ _isclockwise_, _ispolar_, _module_, \ _NL_, _no_, _not_, _or_, _perimeterOf_, \ _Python_, _pygeodesy_abspath_, _sep_, \ _SPACE_, _UNDER_, _version_ from os import getenv as _getenv # in .errors, .geodsolve, .props, .units from os.path import basename as _basename import sys as _sys # in .props try: from importlib import import_module except ImportError: # no import_module in Python 2.6- def import_module(name, package=None): # PYCHOK raise LazyImportError(name=name, package=package, txt=_no_(import_module.__name__)) _a_l_l_ = '__all__' _FOR_DOCS = _getenv('PYGEODESY_FOR_DOCS', NN) # for epydoc ... _imports_ = 'imports' _p_a_c_k_a_g_e_ = '__package__' _PYGEODESY_LAZY_IMPORT_ = 'PYGEODESY_LAZY_IMPORT' _PYTHON_X_DEV = getattr(_sys, '_xoptions', {}).get('dev', # Python 3.2 _getenv('PYTHONDEVMODE', NN)) # PYCHOK exported _sub_packages = 'deprecated' , 'geodesicx' _sys_version_info2 = _sys.version_info[:2] # in .fmath, .geodsolve # @module_property[_RO?] <https://GitHub.com/jtushman/proxy_tools/> isLazy = None # see @var isLazy class LazyImportError(ImportError): '''Raised if C{lazy import} is not supported, disabled or failed some other way. ''' def __init__(self, *name_value, **txt): from pygeodesy.errors import _error_init _error_init(ImportError, self, name_value, **txt) class _Dict(dict): '''(INTERNAL) Imports C{dict}. ''' def add(self, key, value, *values): '''Add C{[key] = value}, typically C{[attr] = mod}. @raise AssertionError: The B{C{key}} already exists with different B{C{value}}. ''' if key in self: val = self[key] # duplicate OK if val != value and val not in values: # PYCHOK no cover from pygeodesy.streprs import Fmt as _Fmt t = _Fmt.SQUARE(_imports_, key), val, value raise AssertionError('%s: %r, not %r' % t) else: self[key] = value class _NamedEnum_RO(dict): '''(INTERNAL) C{Read_Only} enum-like C{dict} sub-class. ''' # _name = NN # also first kwd, __init__(_name=...) def _DOT_(self, attr): return _DOT_(self._name, attr) # PYCHOK _name def __getattr__(self, attr): try: return self[attr] except KeyError: # PYCHOK no cover from pygeodesy.errors import _AttributeError raise _AttributeError(self._DOT_(attr), txt=_doesn_t_exist_) def __setattr__(self, attr, value): # PYCHOK no cover from pygeodesy.errors import _TypeError t = _EQUALSPACED_(self._DOT_(attr), value) raise _TypeError(t, txt=_immutable_) def enums(self): for k, v in dict.items(self): if not k.startswith(_UNDER_): # skip _name yield k, v _ALL_INIT = _pygeodesy_abspath_, _version_ # __all__ value for most modules, accessible as _ALL_LAZY.<module> _ALL_LAZY = _NamedEnum_RO(_name='_ALL_LAZY', albers=('AlbersEqualArea', 'AlbersEqualArea2', 'AlbersEqualArea4', 'AlbersEqualAreaCylindrical', 'AlbersEqualAreaNorth', 'AlbersEqualAreaSouth', 'AlbersError', 'Albers7Tuple'), azimuthal=('AzimuthalError', 'Azimuthal7Tuple', 'Equidistant', 'EquidistantExact', 'EquidistantGeodSolve', 'EquidistantKarney', 'Gnomonic', 'GnomonicExact', 'GnomonicGeodSolve', 'GnomonicKarney', 'LambertEqualArea', 'Orthographic', 'Stereographic', 'equidistant', 'gnomonic'), basics=('clips', 'copysign0', 'copytype', 'halfs2', 'isbool', 'isclass', 'isfinite', 'isidentifier', 'isinf', 'isint', 'iskeyword', 'isnan', 'isnear0', 'isneg0', 'isnon0', 'isodd', 'isscalar', 'issequence', 'isstr', 'issubclassof', 'len2', 'map1', 'map2', 'neg', 'neg_', 'signOf', 'splice', 'ub2str', 'unsign0'), clipy=('ClipError', 'ClipCS4Tuple', 'ClipLB6Tuple', 'ClipSH3Tuple', 'clipCS4', 'clipLB6', 'clipSH', 'clipSH3'), css=('CassiniSoldner', 'Css', 'CSSError', 'toCss', 'EasNorAziRk4Tuple', 'LatLonAziRk4Tuple'), datums=('Datum', 'Datums', 'Transform', 'Transforms'), deprecated=('OK', # DEPRECATED constants 'bases', 'datum', 'nvector', # DEPRECATED modules 'ClipCS3Tuple', 'EcefCartesian', 'HeightIDW', 'HeightIDW2', 'HeightIDW3', 'RefFrameError', 'UtmUps4Tuple', # DEPRECATED classes 'anStr', 'areaof', 'bounds', 'clipCS3', 'clipDMS', 'clipStr', 'decodeEPSG2', 'encodeEPSG', # most of the DEPRECATED functions, ... 'equirectangular3', 'enStr2', 'false2f', 'falsed2f', 'fStr', 'fStrzs', # ... except ellipsoidal, spherical flavors 'hypot3', 'inStr', 'isenclosedby', 'joined', 'joined_', 'nearestOn3', 'nearestOn4', 'parseUTM', 'perimeterof', 'polygon', 'scalar', 'simplify2', 'toUtm', 'unStr', 'utmZoneBand2'), dms=('F_D', 'F_DM', 'F_DMS', 'F_DEG', 'F_MIN', 'F_SEC', 'F__E', 'F__F', 'F__G', 'F_RAD', 'F_D_', 'F_DM_', 'F_DMS_', 'F_DEG_', 'F_MIN_', 'F_SEC_', 'F__E_', 'F__F_', 'F__G_', 'F_RAD_', 'F_D__', 'F_DM__', 'F_DMS__', 'F_DEG__', 'F_MIN__', 'F_SEC__', 'F__E__', 'F__F__', 'F__G__', 'F_RAD__', 'S_DEG', 'S_MIN', 'S_SEC', 'S_RAD', 'S_SEP', 'ParseError', 'bearingDMS', 'clipDegrees', 'clipRadians', 'compassDMS', 'compassPoint', 'degDMS', 'latDMS', 'latlonDMS', 'lonDMS', 'normDMS', 'parseDDDMMSS', 'parseDMS', 'parseDMS2', 'parse3llh', 'parseRad', 'precision', 'toDMS'), ecef=('EcefError', 'EcefFarrell21', 'EcefFarrell22', 'EcefKarney', 'EcefMatrix', 'EcefSudano', 'Ecef9Tuple', 'EcefVeness', 'EcefYou'), elevations=('elevation2', 'geoidHeight2', 'Elevation2Tuple', 'GeoidHeight2Tuple'), ellipsoidalExact=(), # module only ellipsoidalGeodSolve=(), # module only ellipsoidalKarney=(), # module only ellipsoidalNvector=('Ned3Tuple',), # nothing else ellipsoidalVincenty=('VincentyError',), # nothing else ellipsoids=('R_M', 'R_MA', 'R_MB', 'R_KM', 'R_NM', 'R_SM', 'R_FM', 'R_GM', 'R_VM', 'a_f2Tuple', 'Circle4Tuple', 'Curvature2Tuple', 'Ellipsoid', 'Ellipsoid2', 'Ellipsoids', 'a_b2e', 'a_b2e2', 'a_b2e22', 'a_b2e32', 'a_b2f', 'a_b2f_', 'a_b2f2', 'a_b2n', 'a_f2b', 'a_f_2b', 'b_f2a', 'b_f_2a', 'f2e2', 'f2e22', 'f2e32', 'f_2f', 'f2f_', 'f2f2', 'f2n', 'n2e2', 'n2f', 'n2f_'), elliptic=('Elliptic', 'EllipticError', 'Elliptic3Tuple'), epsg=('Epsg', 'EPSGError'), errors=('CrossError', 'IntersectionError', 'NumPyError', 'LenError', 'LimitError', 'PointsError', 'RangeError', 'SciPyError', 'SciPyWarning', 'TRFError', 'UnitError', 'VectorError', 'crosserrors', 'exception_chaining', 'limiterrors', 'rangerrors'), etm=('Etm', 'ETMError', 'ExactTransverseMercator', 'EasNorExact4Tuple', 'LatLonExact4Tuple', 'parseETM5', 'toEtm8'), fmath=('Fdot', 'Fhorner', 'Fpolynomial', 'Fsum', 'cbrt', 'cbrt2', 'euclid', 'euclid_', 'facos1', 'fasin1', 'fatan', 'fatan1', 'fatan2', 'favg', 'fdot', 'fdot3', 'fmean', 'fmean_', 'fhorner', 'fidw', 'fpolynomial', 'fpowers', 'fprod', 'frange', 'freduce', 'fsum', 'fsum_', 'fsum1_', 'hypot', 'hypot_', 'hypot1', 'hypot2', 'hypot2_', 'norm2', 'norm_', 'sqrt0', 'sqrt3'), formy=('antipode', 'antipode_', 'bearing', 'bearing_', 'compassAngle', 'cosineForsytheAndoyerLambert', 'cosineForsytheAndoyerLambert_', 'cosineAndoyerLambert', 'cosineAndoyerLambert_', 'cosineLaw', 'cosineLaw_', 'equirectangular', 'equirectangular_', 'euclidean', 'euclidean_', 'excessAbc', 'excessGirard', 'excessLHuilier', 'excessKarney', 'excessKarney_', 'excessQuad', 'excessQuad_', 'flatLocal', 'flatLocal_', 'flatPolar', 'flatPolar_', 'hartzell', 'haversine', 'haversine_', 'heightOf', 'horizon', 'hubeny', 'hubeny_', 'intersections2', 'isantipode', 'isantipode_', 'latlon2n_xyz', 'n_xyz2latlon', 'n_xyz2philam', 'philam2n_xyz', 'radical2', 'thomas', 'thomas_', 'vincentys', 'vincentys_', 'Radical2Tuple'), frechet=('Frechet', 'FrechetDegrees', 'FrechetError', 'FrechetRadians', 'FrechetCosineAndoyerLambert', 'FrechetCosineForsytheAndoyerLambert', 'FrechetCosineLaw', 'FrechetDistanceTo', 'FrechetEquirectangular', 'FrechetEuclidean', 'FrechetExact', 'FrechetFlatLocal', 'FrechetFlatPolar', 'FrechetHaversine', 'FrechetHubeny', 'FrechetKarney', 'FrechetThomas', 'FrechetVincentys', 'Frechet6Tuple', 'frechet_'), gars=('Garef', 'GARSError'), geodesicx=('gx', 'gxarea', 'gxline', # modules 'Caps', 'GeodesicAreaExact', 'GeodesicExact', 'GeodesicLineExact', 'PolygonArea'), geodsolve=('GeodesicSolve', 'GeodesicLineSolve'), geohash=('Geohash', 'GeohashError', 'Neighbors8Dict', 'Resolutions2Tuple'), geoids=('GeoidError', 'GeoidG2012B', 'GeoidKarney', 'GeoidPGM', 'egmGeoidHeights', 'PGMError', 'GeoidHeight5Tuple'), hausdorff=('Hausdorff', 'HausdorffDegrees', 'HausdorffError', 'HausdorffRadians', 'HausdorffCosineAndoyerLambert', 'HausdorffCosineForsytheAndoyerLambert', 'HausdorffCosineLaw', 'HausdorffDistanceTo', 'HausdorffEquirectangular', 'HausdorffEuclidean', 'HausdorffExact', 'HausdorffFlatLocal', 'HausdorffFlatPolar', 'HausdorffHaversine', 'HausdorffHubeny', 'HausdorffKarney', 'HausdorffThomas', 'HausdorffVincentys', 'Hausdorff6Tuple', 'hausdorff_', 'randomrangenerator'), heights=('HeightError', 'HeightIDWcosineAndoyerLambert', 'HeightIDWcosineForsytheAndoyerLambert', 'HeightIDWcosineLaw', 'HeightIDWdistanceTo', 'HeightIDWequirectangular', 'HeightIDWeuclidean', 'HeightIDWflatLocal', 'HeightIDWflatPolar', 'HeightIDWhaversine', 'HeightIDWhubeny', 'HeightIDWkarney', 'HeightIDWthomas', 'HeightIDWvincentys', 'HeightCubic', 'HeightLinear', 'HeightLSQBiSpline', 'HeightSmoothBiSpline'), interns=_interns_a_l_l_, iters=('LatLon2PsxyIter', 'PointsIter', 'points2', 'isNumpy2', 'isPoints2', 'isTuple2', 'iterNumpy2', 'iterNumpy2over'), karney=('Direct9Tuple', 'GDict', 'GeodesicError', 'GeodSolve12Tuple', 'Inverse10Tuple'), lazily=('LazyImportError', 'isLazy', 'print_', 'printf'), lcc=('Conic', 'Conics', 'Lcc', 'LCCError', 'toLcc'), ltp=('Frustum', 'LocalCartesian', 'LocalError', 'Ltp'), ltpTuples=('Aer', 'Aer4Tuple', 'Enu', 'Enu4Tuple', 'Footprint5Tuple', 'Local9Tuple', 'Ned', 'Ned4Tuple', 'XyzLocal', 'Xyz4Tuple'), mgrs=('Mgrs', 'MGRSError', 'parseMGRS', 'toMgrs', 'Mgrs4Tuple', 'Mgrs6Tuple'), named=('callername', 'classname', 'classnaming', 'modulename', 'nameof', 'notImplemented', 'notOverloaded'), namedTuples=('Bearing2Tuple', 'Bounds2Tuple', 'Bounds4Tuple', 'Destination2Tuple', 'Destination3Tuple', 'Distance2Tuple', 'Distance3Tuple', 'Distance4Tuple', 'EasNor2Tuple', 'EasNor3Tuple', 'Intersection3Tuple', 'LatLon2Tuple', 'LatLon3Tuple', 'LatLon4Tuple', 'LatLonDatum3Tuple', 'LatLonDatum5Tuple', 'LatLonPrec3Tuple', 'LatLonPrec5Tuple', 'NearestOn3Tuple', 'PhiLam2Tuple', 'PhiLam3Tuple', 'PhiLam4Tuple', 'Point3Tuple', 'Points2Tuple', 'Triangle7Tuple', 'Triangle8Tuple', 'Trilaterate5Tuple', 'UtmUps2Tuple', 'UtmUps5Tuple', 'UtmUps8Tuple', 'UtmUpsLatLon5Tuple', 'Vector2Tuple', 'Vector3Tuple', 'Vector4Tuple'), osgr=('Osgr', 'OSGRError', 'parseOSGR', 'toOsgr'), points=('LatLon_', 'LatLon2psxy', 'NearestOn5Tuple', 'Numpy2LatLon', 'Shape2Tuple', 'Tuple2LatLon', _areaOf_, 'boundsOf', 'centroidOf', 'fractional', _isclockwise_, 'isconvex', 'isconvex_', 'isenclosedBy', _ispolar_, 'luneOf', 'nearestOn5', _perimeterOf_, 'quadOf'), props=('Property', 'Property_RO', 'property_RO', 'property_doc_', 'deprecated_class', 'deprecated_function', 'deprecated_method', 'deprecated_Property_RO', 'deprecated_property_RO', 'DeprecationWarnings'), sphericalNvector=(), # module only sphericalTrigonometry=(), # module only simplify=('simplify1', 'simplifyRDP', 'simplifyRDPm', 'simplifyRW', 'simplifyVW', 'simplifyVWm'), streprs=('anstr', 'attrs', 'enstr2', 'fstr', 'fstrzs', 'hstr', 'instr', 'pairs', 'reprs', 'strs', 'unstr'), trf=('RefFrame', 'RefFrames', 'Transform7Tuple', 'date2epoch', 'epoch2date', 'trfXform'), units=('Band', 'Bearing', 'Bearing_', 'Bool', 'Degrees', 'Degrees_', 'Degrees2', 'Distance', 'Distance_', 'Easting', 'Epoch', 'Feet', 'FIx', 'Float', 'Float_', 'Height', 'Int', 'Int_', 'Lam', 'Lam_', 'Lat', 'Lat_', 'Lon', 'Lon_', 'Meter', 'Meter_', 'Meter2', 'Meter3', 'Northing', 'Number_', 'Phi', 'Phi_', 'Precision_', 'Radians', 'Radians_', 'Radians2', 'Radius', 'Radius_', 'Scalar', 'Scalar_', 'Str', 'Zone'), ups=('Ups', 'UPSError', 'parseUPS5', 'toUps8', 'upsZoneBand5'), utily=('acos1', 'acre2ha', 'acre2m2', 'asin1', 'atand', 'atan2b', 'atan2d', 'chain2m', 'circle4', 'cotd', 'cotd_', 'degrees', 'degrees90', 'degrees180', 'degrees360', 'degrees2grades', 'degrees2m', 'fathom2m', 'ft2m', 'furlong2m', 'grades', 'grades400', 'grades2degrees', 'grades2radians', 'm2degrees', 'm2ft', 'm2km', 'm2NM', 'm2radians', 'm2SM', 'm2yard', 'radians', 'radiansPI', 'radiansPI2', 'radiansPI_2', 'radians2m', 'sincos2', 'sincos2_', 'sincos2d', 'sincos2d_', 'tand', 'tand_', 'tan_2', 'tanPI_2_2', 'unroll180', 'unrollPI', 'wrap90', 'wrap180', 'wrap360', 'wrapPI_2','wrapPI', 'wrapPI2', 'yard2m'), utm=('Utm', 'UTMError', 'parseUTM5', 'toUtm8', 'utmZoneBand5'), utmups=('UtmUps', 'UTMUPSError', 'parseUTMUPS5', 'toUtmUps8', 'utmupsValidate', 'utmupsValidateOK', 'utmupsZoneBand5'), vector2d=('Circin6Tuple', 'Circum3Tuple', 'Circum4Tuple', 'Meeus2Tuple', 'Radii11Tuple', 'Soddy4Tuple', 'circin6', 'circum3', 'circum4_', 'meeus2', 'radii11', 'soddy4'), vector3d=('Vector3d', 'intersection3d3', 'iscolinearWith', 'parse3d', 'trilaterate2d2', 'trilaterate3d2'), webmercator=('Wm', 'WebMercatorError', 'parseWM', 'toWm', 'EasNorRadius3Tuple'), wgrs=('Georef', 'WGRSError')) # DEPRECATED __all__ names overloading those in _ALL_LAZY.deprecated where # the new name is fully backward compatible in signature and return value _ALL_OVERRIDDEN = _NamedEnum_RO(_name='_ALL_OVERRIDING', # all DEPRECATED basics=('clips as clipStr',), fmath=('hypot_ as hypot3',), formy=('points2 as polygon',), heights=('HeightIDWequirectangular as HeightIDW2', 'HeightIDWeuclidean as HeightIDW', 'HeightIDWhaversine as HeightIDW3'), points=('areaOf as areaof', 'isenclosedBy as isenclosedby', 'perimeterOf as perimeterof'), simplify=('simplifyRW as simplify2',), streprs=('anstr as anStr', 'enstr2 as enStr2', 'fstr as fStr', 'fstrzs as fStrzs', 'instr as inStr', 'unstr as unStr')) __all__ = _ALL_LAZY.lazily __version__ = '21.09.06' def _ALL_OTHER(*objs): '''(INTERNAL) List local objects for __all__. ''' from pygeodesy import interns # PYCHOK import def _dun(o): n = _dunder_name(o).rsplit(_DOT_, 1)[-1] u = NN(_UNDER_, n, _UNDER_) return getattr(interns, u, n) return tuple(map(_dun, objs)) if _FOR_DOCS: _ALL_DOCS = _ALL_OTHER # (INTERNAL) Only export B{C{objs.__name__}} when making the # docs to force C{epydoc} to include certain classes, methods, # functions and other names in the documentation. Using the # C{epydoc --private ...} command line option tends to include # too much internal documentation. else: def _ALL_DOCS(*unused): return () def _all_imports(**more): '''(INTERNAL) Build C{dict} of all lazy imports. ''' # imports naming conventions stored below - [<key>] = <from>: # import <module> - [<module>] = <module> # from <module> import <attr> - [<attr>] = <module> # from pygeodesy import <attr> - [<attr>] = <attr> # from <module> import <attr> as <name> - [<name>] = <module>.<attr> imports = _Dict() imports_add = imports.add for ALL in (_ALL_LAZY, _ALL_OVERRIDDEN, more): for mod, attrs in ALL.items(): if isinstance(attrs, tuple) and not mod.startswith(_UNDER_): imports_add(mod, mod) for attr in attrs: attr, _, as_attr = attr.partition(' as ') if as_attr: imports_add(as_attr, _DOT_(mod, attr), *_sub_packages) else: imports_add(attr, mod) return imports def _all_missing2(_all_): '''(INTERNAL) Get diffs between pygeodesy.__all__ and lazily._all_imports. ''' _alzy = _all_imports(**_NamedEnum_RO((a, ()) for a in _ALL_INIT)) return ((_DOT_('lazily', _all_imports.__name__), _COMMASPACE_.join(a for a in _all_ if a not in _alzy)), (_DOT_('pygeodesy', _a_l_l_), _COMMASPACE_.join(a for a in _alzy if a not in _all_))) def _caller3(up): # in .named '''(INTERNAL) Get 3-tuple C{(caller name, file name, line number)} for the caller B{C{up}} stack frames in the Python call stack. ''' # sys._getframe(1) ... 'importlib._bootstrap' line 1032, # may throw a ValueError('call stack not deep enough') f = _sys._getframe(up + 1) return (f.f_code.co_name, # caller name _basename(f.f_code.co_filename), # file name f.f_lineno) # line number def _lazy_import2(_pygeodesy_): # MCCABE 15 '''Check for and set up C{lazy import}. @arg _pygeodesy_: The name of the package (C{str}) performing the imports, to help facilitate resolving relative imports, usually C{__package__}. @return: 2-Tuple C{(package, getattr)} of the importing package for easy reference within itself and the callable to be set to `__getattr__`. @raise LazyImportError: Lazy import not supported or not enabled, an import failed or the package name or module name or attribute name is invalid or does not exist. @note: This is the original function U{modutil.lazy_import <https://GitHub.com/brettcannon/modutil/blob/master/modutil.py>} modified to handle the C{__all__} and C{__dir__} attributes and call C{importlib.import_module(<module>.<name>, ...)} without causing a C{ModuleNotFoundError}. @see: The original U{modutil<https://PyPi.org/project/modutil>}, U{PEP 562<https://www.Python.org/dev/peps/pep-0562>} and the U{new way<https://Snarky.CA/lazy-importing-in-python-3-7/>}. ''' if _sys_version_info2 < (3, 7): # not supported before 3.7 t = _no_(_DOT_(_pygeodesy_, _lazy_import2.__name__)) raise LazyImportError(t, txt=_Python_(_sys)) package, parent = _lazy_init2(_pygeodesy_) packages = (parent, '__main__', NN) + tuple( _DOT_(parent, s) for s in _sub_packages) imports = _all_imports() def __getattr__(name): # __getattr__ only for Python 3.7+ # only called once for each undefined pygeodesy attribute if name in imports: # importlib.import_module() implicitly sets sub-modules # on this module as appropriate for direct imports (see # note in the _lazy_import.__doc__ above). mod, _, attr = imports[name].partition(_DOT_) if mod not in imports: raise LazyImportError(_no_(_module_), txt=_DOT_(parent, mod)) imported = import_module(_DOT_(_pygeodesy_, mod), parent) pkg = getattr(imported, _p_a_c_k_a_g_e_, None) if pkg not in packages: # invalid package raise LazyImportError(_DOT_(mod, _p_a_c_k_a_g_e_), pkg) # import the module or module attribute if attr: imported = getattr(imported, attr, MISSING) elif name != mod: imported = getattr(imported, name, MISSING) if imported is MISSING: raise LazyImportError(_no_(_attribute_), txt=_DOT_(mod, attr or name)) elif name in (_a_l_l_,): # XXX '_d_i_r_', '_m_e_m_b_e_r_s_'? imported = _ALL_INIT + tuple(imports.keys()) mod = NN else: raise LazyImportError(_no_(_module_, _or_, _attribute_), txt=_DOT_(parent, name)) setattr(package, name, imported) if isLazy > 1: z = NN if mod and mod != name: z = ' from .%s' % (mod,) if isLazy > 2: try: # see C{_caller3} _, f, s = _caller3(2) z = '%s by %s line %d' % (z, f, s) except ValueError: # PYCHOK no cover pass printf('# lazily imported %s%s', _DOT_(parent, name), z) return imported # __getattr__ return package, __getattr__ # _lazy_import2 def _lazy_init2(_pygeodesy_): '''(INTERNAL) Try to initialize lazy import. @arg _pygeodesy_: The name of the package (C{str}) performing the imports, to help facilitate resolving relative imports, usually C{__package__}. @return: 3-Tuple C{(import_module, package, parent)} of module C{importlib.import_module}, the importing C{package} for easy reference within itself, always C{pygeodesy} and the package name, aka the C{parent}, always C{'pygeodesy'}. @raise LazyImportError: Lazy import not supported or not enabled, an import failed or the package name is invalid or does not exist. @note: Global C{isLazy} is set accordingly. ''' global isLazy z = _getenv(_PYGEODESY_LAZY_IMPORT_, None) if z is None: # _PYGEODESY_LAZY_IMPORT_ not set isLazy = 1 # ... but on by default on 3.7 else: z = z.strip() # like PYTHONVERBOSE et.al. isLazy = int(z) if z.isdigit() else (1 if z else 0) if isLazy < 1: # not enabled raise LazyImportError(_PYGEODESY_LAZY_IMPORT_, repr(z), txt=_not_(_enabled_)) if _getenv('PYTHONVERBOSE', None): # PYCHOK no cover isLazy += 1 try: # to initialize in Python 3+ package = import_module(_pygeodesy_) parent = package.__spec__.parent # __spec__ only in Python 3.7+ if parent != _pygeodesy_: # assert t = _COMMASPACE_(parent, _not_(_pygeodesy_)) raise AttributeError(_EQUALSPACED_('parent', t)) except (AttributeError, ImportError) as x: # PYCHOK no cover isLazy = False # failed raise LazyImportError(_lazy_init2.__name__, _pygeodesy_, txt=str(x)) return package, parent def print_(*args, **nl_nt_prefix_end_file_flush_sep): '''Python 3-style C{print} function. @arg args: Values to be converted to C{str} and concatenated (C{any} types). @kwarg nl=0: Number of leading blank lines (C{int}). @kwarg nt=0: Number of additional , trailing blank lines (C{int}). @kwarg prefix=NN: To be inserted before the formatted text (C{str}). @note: Python 3+ keyword arguments C{end}, C{file} and C{flush} are silently ignored. ''' sep = nl_nt_prefix_end_file_flush_sep.get(_sep_, _SPACE_) txt = sep.join(map(str, args)) printf(txt, **nl_nt_prefix_end_file_flush_sep) def printf(fmt, *args, **nl_nt_prefix_end_file_flush_sep): '''C-style C{printf} function. @arg fmt: C-style formating text (C{str}). @arg args: Values to be formatted (C{any} types). @kwarg nl=0: Number of leading blank lines (C{int}). @kwarg nt=0: Number of additional , trailing blank lines (C{int}). @kwarg prefix=NN: To be inserted before the formatted text (C{str}). @note: Python 3+ keyword arguments C{end}, C{file}, C{flush} and C{sep} are silently ignored. ''' def _kwds(nl=0, nt=0, prefix=NN, **kwds): # XXX end? nl = (_NL_ * nl) if nl else NN nt = (_NL_ * nt) if nt else NN return nl, nt, prefix, kwds nl, nt, prefix, _ = _kwds(**nl_nt_prefix_end_file_flush_sep) if args: fmt %= args # elif kwds: # fmt %= kwds print(NN(nl, prefix, fmt, nt)) # **) MIT License # # Copyright (C) 2018-2021 -- 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.