Coverage for pygeodesy/lazily.py: 97%

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1 

2# -*- coding: utf-8 -*- 

3 

4u'''Lazily import C{pygeodesy} modules and attributes, based on 

5U{lazy_import<https://modutil.ReadTheDocs.io/en/latest/#lazy_import>} 

6from I{Brett Cannon}'s U{modutil<https://PyPI.org/project/modutil>}. 

7 

8C{Lazy import} is I{supported only for }U{Python 3.7+ 

9<https://Snarky.Ca/lazy-importing-in-python-3-7>} and is I{enabled by 

10default} in U{PyGeodesy 18.11.10<https://PyPI.org/project/PyGeodesy>} 

11I{and newer}. 

12 

13To I{enable} C{lazy import}, set C{env} variable C{PYGEODESY_LAZY_IMPORT} 

14to C{1}, C{2}, C{3} or higher prior to C{import pygeodesy}. To I{disable} 

15C{lazy import}, set C{env} variable C{PYGEODESY_LAZY_IMPORT} to C{0} or 

16an empty string. Use C{2} or higher to print a message for each lazily 

17imported module and attribute, similar to C{env} variable C{PYTHONVERBOSE} 

18showing imports. Using C{3} or higher also shows the importing file name 

19and line number. 

20 

21@note: C{Lazy import} applies only to top-level modules of C{pygeodesy}. 

22 The C{lazy import} of a top-level module invariably loads all 

23 sub-modules imported by that top-level module. 

24 

25@note: C{Lazy import} raises a L{LazyAttributeError} or L{LazyImportError} 

26 depending on the cause of the error and such errors can occur late, 

27 after all initial imports. 

28''' 

29 

30from pygeodesy import internals as _internals, interns as _interns, \ 

31 _isfrozen # DON'T _lazy_import2 

32# from pygeodesy.errors import _error_init, _xkwds_item2 # _ALL_MODS 

33from pygeodesy.internals import _caller3, _dunder_nameof, _dunder_ismain, \ 

34 _headof, printf, _Pythonarchine, _tailof # _Property_RO 

35from pygeodesy.interns import NN, _attribute_, _by_, _COLONSPACE_, _COMMASPACE_, \ 

36 _doesn_t_exist_, _DOT_, _EQUALSPACED_, _from_, \ 

37 _HASH_, _immutable_, _line_, _module_, _no_, _not_, \ 

38 _or_, _pygeodesy_abspath_, _pygeodesy_, _SPACE_, \ 

39 _SUB_PACKAGES, _UNDER_, _version_, _sys, \ 

40 _intern # function 

41# from pygeodesy.streprs import unstr # _ALL_MODS 

42 

43try: 

44 from importlib import import_module 

45except ImportError as x: # Python 2.6- 

46 raise ImportError(_COLONSPACE_(_Pythonarchine(sep=_SPACE_), x)) 

47from os import getenv as _getenv 

48# import sys as _sys # from .interns 

49 

50__as__ = ' as ' 

51_dunder_all_ = '__all__' # in .__main__ 

52_enabled_ = 'enabled' 

53_FOR_DOCS = _getenv('PYGEODESY_FOR_DOCS', NN) # for epydoc ... 

54_i0 = () # PYCHOK empty tuple 

55_init__all__ = _FOR_DOCS or _getenv('PYGEODESY_INIT__ALL__', _dunder_all_) == _dunder_all_ # PYCHOK exported 

56_lazily_ = 'lazily' 

57_lazily_imported_ = _SPACE_(_HASH_, _lazily_, 'imported') 

58_PYGEODESY_GEOCONVERT_ = 'PYGEODESY_GEOCONVERT' # PYCHOK .mgrs, test.bases 

59_PYGEODESY_GEODSOLVE_ = 'PYGEODESY_GEODSOLVE' # PYCHOK .geodsolve, test.bases 

60_PYGEODESY_INTERSECTTOOL_ = 'PYGEODESY_INTERSECTTOOL' # PYCHOK .intersectool, test.bases 

61_PYGEODESY_LAZY_IMPORT_ = 'PYGEODESY_LAZY_IMPORT' 

62_PYGEODESY_RHUMBSOLVE_ = 'PYGEODESY_RHUMBSOLVE' # PYCHOK .rhumb.solve, test.bases 

63_PYTHON_X_DEV = getattr(_sys, '_xoptions', {}).get('dev', # Python 3.2+ 

64 _getenv('PYTHONDEVMODE', NN)) # PYCHOK exported 

65_sys_version_info2 = _sys.version_info[:2] # in .basics, .fmath, ... 

66_unlazy = _unLazy0 = _isfrozen or _sys_version_info2 < (3, 7) # PYCHOK mod.__getattr__ 3.7+ 

67_WARNINGS_X_DEV = _getenv('PYGEODESY_WARNINGS', NN) and ( 

68 _PYTHON_X_DEV or bool(_sys.warnoptions)) # PYCHOK .props 

69# @module_property[_RO?] <https://GitHub.com/jtushman/proxy_tools/> 

70isLazy = None # see @var isLazy in .__init__ 

71 

72 

73class LazyAttributeError(AttributeError): 

74 '''Raised if a C{lazily imported} attribute is missing or invalid. 

75 ''' 

76 def __init__(self, *name_value, **txt): 

77 _ALL_MODS.errors._error_init(AttributeError, self, name_value, **txt) 

78 

79 

80class LazyImportError(ImportError): 

81 '''Raised if C{lazy import} is not supported, disabled or failed some other way. 

82 ''' 

83 def __init__(self, *name_value, **txt): 

84 _ALL_MODS.errors._error_init(ImportError, self, name_value, **txt) 

85 

86 

87class _Dict(dict): 

88 '''(INTERNAL) Imports C{dict}. 

89 ''' 

90 _name = NN 

91 

92 def __getattr__(self, attr): 

93 try: 

94 return self[attr] 

95 except KeyError: 

96 return dict.__getattr__(self, attr) 

97 

98# def __setattr__(self, attr, value): 

99# if attr in self: 

100# self[attr] = value 

101# else: 

102# dict.__setattr__(self, attr, value) 

103 

104 def add(self, name, mod_, *subs): 

105 '''Add a C{[name] = mod_} item. 

106 

107 @raise AssertionError: The B{C{name}} already exists 

108 with a different B{C{mod_}}. 

109 ''' 

110 if name in self: 

111 sub = self[name] # duplicate OK 

112 if sub != mod_ and sub not in subs: # PYCHOK no cover 

113 t = _DOT_(self._name, name) 

114 t = _COLONSPACE_(t, repr(sub)) 

115 t = _COMMASPACE_(t, _not_(repr(mod_))) 

116 raise AssertionError(t) 

117 else: 

118 self[name] = mod_ 

119 

120 def _NAME(self, which): 

121 self._name = _intern(_dunder_nameof(which).upper()) 

122 

123 

124class _NamedEnum_RO(dict): 

125 '''(INTERNAL) C{Read_Only} enum-like C{dict} sub-class. 

126 ''' 

127# _name = NN # also first kwd, __init__(_name=...) 

128 

129 def _DOT_(self, attr): # PYCHOK no cover 

130 return _DOT_(self._name, attr) # PYCHOK _name 

131 

132 def __getattr__(self, attr): 

133 try: 

134 return self[attr] 

135 except KeyError: 

136 t = self._DOT_(attr) 

137 raise LazyAttributeError(t, txt=_doesn_t_exist_) 

138 

139 def __setattr__(self, attr, value): # PYCHOK no cover 

140 t = _EQUALSPACED_(self._DOT_(attr), repr(value)) 

141 raise LazyAttributeError(_immutable_, txt=t) 

142 

143 def enums(self): 

144 # Yield all C{(mod_, tuple)} pairs 

145 for m, t in dict.items(self): 

146 n = m.replace(_UNDER_, _DOT_) 

147 if n != m: 

148 if m.startswith(_UNDER_): 

149 continue # skip _name= ... 

150 u = m.rstrip(_UNDER_) 

151 if u != m: 

152 u = len(u) 

153 n = n[:u] + m[u:] 

154 yield n, t 

155 

156 def fill_D(self, _D, which): 

157 # Fill C{_Dict _D}. 

158 _D._NAME(which) 

159 _a = _D.add 

160 for m, t in self.enums(): 

161 _a(m, _DOT_(m, NN, NN)) # import module 

162 for a in t: 

163 a, _, as_ = a.partition(__as__) 

164 if as_: # import attr as attr_ 

165 _a(as_, _DOT_(m, a, NN), *_SUB_PACKAGES) 

166 else: 

167 _a(a, m) 

168 return _D 

169 

170 

171def _i(*names): 

172 '''(INTERNAL) Intern all C{names}. 

173 ''' 

174 return tuple(map(_intern, names)) if names else _i0 

175 

176 

177def _ALL_ATTRS(*attrs): 

178 '''(INTERNAL) Unravel all exported module attributes. 

179 ''' 

180 t = () 

181 for attr in attrs: 

182 t += tuple(map(_getattrof, attr)) 

183 return t 

184 

185 

186_ALL_INIT = _i(_pygeodesy_abspath_, _version_) 

187 

188# __all__ value for most modules, accessible as _ALL_LAZY.<module> 

189_ALL_LAZY = _NamedEnum_RO(_name='_ALL_LAZY', 

190 albers=_i('AlbersEqualArea', 'AlbersEqualArea2', 'AlbersEqualArea4', 

191 'AlbersEqualAreaCylindrical', 'AlbersEqualAreaNorth', 'AlbersEqualAreaSouth', 

192 'AlbersError', 'Albers7Tuple'), 

193 auxilats=_i(), # module only 

194 azimuthal=_i('AzimuthalError', 'Azimuthal7Tuple', 

195 'Equidistant', 'EquidistantExact', 'EquidistantGeodSolve', 'EquidistantKarney', 

196 'Gnomonic', 'GnomonicExact', 'GnomonicGeodSolve', 'GnomonicKarney', 

197 'LambertEqualArea', 'Orthographic', 'Stereographic', 

198 'equidistant', 'gnomonic'), 

199 basics=_i('clips', 'copysign0', 'copytype', 'halfs2', 

200 'int1s', 'isbool', 'isCartesian', 'isclass', 'iscomplex', 'isDEPRECATED', 'isfloat', 

201 'isidentifier', 'isinstanceof', 'isint', 'isiterable', 'isiterablen', 'iskeyword', 

202 'isLatLon', 'islistuple', 'isNvector', 'isodd', 'isscalar', 'issequence', 'isstr', 

203 'issubclassof', 'itemsorted', 

204 'len2', 'map1', 'map2', 'neg', 'neg_', 

205 'signBit', 'signOf', 'splice', 'str2ub', 'ub2str', 'unsigned0'), 

206 booleans=_i('BooleanFHP', 'BooleanGH', 'LatLonFHP', 'LatLonGH', 

207 'isBoolean'), 

208 cartesianBase=_i('RadiusThetaPhi3Tuple', 'rtp2xyz', 'rtp2xyz_', 'xyz2rtp', 'xyz2rtp_'), 

209 clipy=_i('ClipCS4Tuple', 'ClipFHP4Tuple', 'ClipGH4Tuple', 'ClipLB6Tuple', 'ClipSH3Tuple', 

210 'clipCS4', 'clipFHP4', 'clipGH4', 'clipLB6', 'clipSH', 'clipSH3'), 

211 css=_i('CassiniSoldner', 'Css', 'CSSError', 'toCss', 

212 'EasNorAziRk4Tuple', 'EasNorAziRkEqu6Tuple', 'LatLonAziRk4Tuple'), 

213 constants=_i('DIG', 'EPS', 'EPS0', 'EPS02', 'EPS1', 'EPS2', 'EPS4', 'EPS_2', 

214 'INF', 'INT0', 'MANT_DIG', 'MAX', 'MAX_EXP', 'MIN', 'MIN_EXP', 'NAN', 'NEG0', 'NINF', 

215 'PI', 'PI2', 'PI_2', 'PI3', 'PI_3', 'PI3_2', 'PI4', 'PI_4', 

216 'R_FM', 'R_GM', 'R_KM', 'R_M', 'R_MA', 'R_MB', 'R_NM', 'R_QM', 'R_SM', 'R_VM', 

217 'float_', 'float0_', 'isclose', 'isfinite', 'isinf', 'isint0', 

218 'isnan', 'isnear0', 'isnear1', 'isnear90', 'isneg0', 'isninf', 'isnon0', 

219 'remainder'), 

220 datums=_i('Datum', 'Datums', 'Transform', 'Transforms'), 

221# deprecated=_i(), # module only 

222 dms=_i('F_D', 'F_DM', 'F_DMS', 'F_DEG', 'F_MIN', 'F_SEC', 'F_D60', 'F__E', 'F__F', 'F__G', 'F_RAD', 

223 'F_D_', 'F_DM_', 'F_DMS_', 'F_DEG_', 'F_MIN_', 'F_SEC_', 'F_D60_', 'F__E_', 'F__F_', 'F__G_', 'F_RAD_', 

224 'F_D__', 'F_DM__', 'F_DMS__', 'F_DEG__', 'F_MIN__', 'F_SEC__', 'F_D60__', 'F__E__', 'F__F__', 'F__G__', 'F_RAD__', 

225 'S_DEG', 'S_MIN', 'S_SEC', 'S_DMS', 'S_RAD', 'S_SEP', 

226 'bearingDMS', 'clipDegrees', 'clipRadians', 'compassDMS', 'compassPoint', 

227 'degDMS', 'latDMS', 'latlonDMS', 'latlonDMS_', 'lonDMS', 'normDMS', 

228 'parseDDDMMSS', 'parseDMS', 'parseDMS2', 'parse3llh', 'parseRad', 'precision', 'toDMS'), 

229 ecef=_i('EcefError', 'EcefFarrell21', 'EcefFarrell22', 'EcefKarney', 'EcefMatrix', 

230 'EcefSudano', 'Ecef9Tuple', 'EcefVeness', 'EcefYou'), 

231 elevations=_i('Elevation2Tuple', 'GeoidHeight2Tuple', 

232 'elevation2', 'geoidHeight2'), 

233 ellipsoidalBase=_i(), # module only 

234 ellipsoidalBaseDI=_i(), # module only 

235 ellipsoidalExact=_i(), # module only 

236 ellipsoidalGeodSolve=_i(), # module only 

237 ellipsoidalKarney=_i(), # module only 

238 ellipsoidalNvector=_i(), # module only 

239 ellipsoidalVincenty=_i('VincentyError',), # nothing else 

240 ellipsoids=_i('a_f2Tuple', 'Circle4Tuple', 'Curvature2Tuple', 

241 'Ellipsoid', 'Ellipsoid2', 'Ellipsoids', 

242 'a_b2e', 'a_b2e2', 'a_b2e22', 'a_b2e32', 'a_b2f', 'a_b2f_', 'a_b2f2', 'a_b2n', 

243 'a_f2b', 'a_f_2b', 'b_f2a', 'b_f_2a', 

244 'e2f', 'e22f', 

245 'f2e2', 'f2e22', 'f2e32', 'f_2f', 'f2f_', 'f2f2', 'f2n', 'n2e2', 'n2f', 'n2f_'), 

246 elliptic=_i('Elliptic', 'EllipticError', 'Elliptic3Tuple'), 

247 epsg=_i('Epsg', 'EPSGError'), 

248 errors=_i('AuxError', 'ClipError', 'CrossError', 'GeodesicError', 'IntersectionError', 

249 'NumPyError', 'LenError', 'LimitError', 'MGRSError', 

250 'ParseError', 'PointsError', 'RangeError', 'RhumbError', 

251 'SciPyError', 'SciPyWarning', 'TRFError', 'TriangleError', 'UnitError', 'VectorError', 

252 'crosserrors', 'exception_chaining', 'isError', 'limiterrors', 'rangerrors'), 

253 etm=_i('Etm', 'ETMError', 'ExactTransverseMercator', 

254 'parseETM5', 'toEtm8'), 

255 fmath=_i('Fdot', 'Fhorner', 'Fhypot', 'Fpolynomial', 'Fpowers', 'Fcbrt', 'Froot', 'Fsqrt', 

256 'bqrt', 'cbrt', 'cbrt2', 'euclid', 'euclid_', 

257 'facos1', 'fasin1', 'fatan', 'fatan1', 'fatan2', 'favg', 

258 'fdot', 'fdot3', 'fmean', 'fmean_', 'fhorner', 'fidw', 'fpolynomial', 

259 'fpowers', 'fprod', 'frandoms', 'frange', 'freduce', 'fremainder', 

260 'hypot', 'hypot_', 'hypot1', 'hypot2', 'hypot2_', 

261 'norm2', 'norm_', 'sqrt0', 'sqrt3', 'sqrt_a', 'zcrt', 'zqrt'), 

262 formy=_i('Radical2Tuple', 

263 'antipode', 'antipode_', 'bearing', 'bearing_', 

264 'compassAngle', 'cosineForsytheAndoyerLambert', 'cosineForsytheAndoyerLambert_', 

265 'cosineAndoyerLambert', 'cosineAndoyerLambert_', 'cosineLaw', 'cosineLaw_', 

266 'equirectangular', 'equirectangular4', 'euclidean', 'euclidean_', 

267 'excessAbc_', 'excessCagnoli_', 'excessGirard_', 'excessLHuilier_', 

268 'excessKarney', 'excessKarney_', 'excessQuad', 'excessQuad_', 

269 'flatLocal', 'flatLocal_', 'flatPolar', 'flatPolar_', 

270 'hartzell', 'haversine', 'haversine_', 'heightOf', 'heightOrthometric', 'horizon', 'hubeny', 'hubeny_', 

271 'intersection2', 'intersections2', 'isantipode', 'isantipode_', 'isnormal', 'isnormal_', 

272 'latlon2n_xyz', 'normal', 'normal_', 'n_xyz2latlon', 'n_xyz2philam', 

273 'opposing', 'opposing_', 'philam2n_xyz', 'radical2', 

274 'thomas', 'thomas_', 'vincentys', 'vincentys_'), 

275 frechet=_i('Frechet', 'FrechetDegrees', 'FrechetError', 'FrechetRadians', 

276 'FrechetCosineAndoyerLambert', 'FrechetCosineForsytheAndoyerLambert', 

277 'FrechetCosineLaw', 'FrechetDistanceTo', 'FrechetEquirectangular', 

278 'FrechetEuclidean', 'FrechetExact', 'FrechetFlatLocal', 'FrechetFlatPolar', 

279 'FrechetHaversine', 'FrechetHubeny', 'FrechetKarney', 'FrechetThomas', 

280 'FrechetVincentys', 'Frechet6Tuple', 

281 'frechet_'), 

282 fstats=_i('Fcook', 'Flinear', 'Fwelford'), 

283 fsums=_i('Fsum', 'DivMod2Tuple', 'Fsum2Tuple', 'ResidualError', 

284 'fsum', 'fsum_', 'fsumf_', 'fsum1', 'fsum1_', 'fsum1f_'), 

285 gars=_i('Garef', 'GARSError'), 

286 geodesici=_i('Intersectool', 'Intersectool5Tuple', 'Intersect7Tuple', 

287 'Intersector', 'Intersector5Tuple', 'Middle5Tuple', 'XDict'), 

288 geodesicw=_i('Geodesic', 'GeodesicLine', 'Geodesic_WGS84'), 

289 geodesicx=_i('gx', 'gxarea', 'gxbases', 'gxline', # modules 

290 'GeodesicAreaExact', 'GeodesicExact', 'GeodesicLineExact', 'PolygonArea'), 

291 geodsolve=_i('GeodesicSolve', 'GeodesicLineSolve', 'GeodSolve12Tuple'), 

292 geohash=_i('Geohash', 'Geohashed', 'GeohashError', 'Neighbors8Dict', 'Resolutions2Tuple', 'Sizes3Tuple'), 

293 geoids=_i('GeoidError', 'GeoidG2012B', 'GeoidKarney', 'GeoidPGM', 'egmGeoidHeights', 

294 'PGMError', 'GeoidHeight5Tuple'), 

295 hausdorff=_i('Hausdorff', 'HausdorffDegrees', 'HausdorffError', 'HausdorffRadians', 

296 'HausdorffCosineAndoyerLambert', 'HausdorffCosineForsytheAndoyerLambert', 

297 'HausdorffCosineLaw', 'HausdorffDistanceTo', 'HausdorffEquirectangular', 

298 'HausdorffEuclidean', 'HausdorffExact', 'HausdorffFlatLocal', 'HausdorffFlatPolar', 

299 'HausdorffHaversine', 'HausdorffHubeny', 'HausdorffKarney', 'HausdorffThomas', 

300 'HausdorffVincentys', 'Hausdorff6Tuple', 

301 'hausdorff_', 'randomrangenerator'), 

302 heights=_i('HeightCubic', 'HeightError', 

303 'HeightIDWcosineAndoyerLambert', 'HeightIDWcosineForsytheAndoyerLambert', 

304 'HeightIDWcosineLaw', 'HeightIDWdistanceTo', 'HeightIDWequirectangular', 

305 'HeightIDWeuclidean', 'HeightIDWexact', 'HeightIDWflatLocal', 'HeightIDWflatPolar', 

306 'HeightIDWhaversine', 'HeightIDWhubeny', 'HeightIDWkarney', 'HeightIDWthomas', 

307 'HeightIDWvincentys', 'HeightLinear', 'HeightLSQBiSpline', 'HeightSmoothBiSpline'), 

308 internals=_internals.__all__, 

309 interns=_interns.__all__, 

310 iters=_i('LatLon2PsxyIter', 'PointsIter', 'points2', 

311 'isNumpy2', 'isPoints2', 'isTuple2', 'iterNumpy2', 'iterNumpy2over'), 

312 karney=_i('Area3Tuple', 'Caps', 'Direct9Tuple', 'GDict', 'Inverse10Tuple', 'Rhumb8Tuple'), 

313 ktm=_i('KTMError', 'KTransverseMercator'), 

314 latlonBase=_i(), # module only 

315 lazily=_i('LazyAttributeError', 'LazyImportError', 'isLazy'), 

316 lcc=_i('Conic', 'Conics', 'Lcc', 'LCCError', 'toLcc'), 

317 ltp=_i('Attitude', 'AttitudeError', 'ChLV', 'ChLVa', 'ChLVe', 'Frustum', 

318 'LocalCartesian', 'LocalError', 'Ltp', 'tyr3d'), 

319 ltpTuples=_i('Aer', 'Aer4Tuple', 'Attitude4Tuple', 

320 'ChLVEN2Tuple', 'ChLV9Tuple', 'ChLVYX2Tuple', 'ChLVyx2Tuple', 

321 'Enu', 'Enu4Tuple', 'Footprint5Tuple', 'Local9Tuple', 'Los', 

322 'Ned', 'Ned4Tuple', 'Uvw', 'Uvw3Tuple', 'XyzLocal', 'Xyz4Tuple'), 

323 mgrs=_i('Mgrs', 'parseMGRS', 'toMgrs', 'Mgrs4Tuple', 'Mgrs6Tuple'), 

324 named=_i('ADict', 

325 'callername', 'classname', 'classnaming', 'modulename', 

326 'nameof', 'notImplemented', 'notOverloaded'), 

327 namedTuples=_i('Bearing2Tuple', 'Bounds2Tuple', 'Bounds4Tuple', 

328 'Destination2Tuple', 'Destination3Tuple', 

329 'Distance2Tuple', 'Distance3Tuple', 'Distance4Tuple', 

330 'EasNor2Tuple', 'EasNor3Tuple', 'Forward4Tuple', 'Intersection3Tuple', 

331 'LatLon2Tuple', 'LatLon3Tuple', 'LatLon4Tuple', 

332 'LatLonDatum3Tuple', 'LatLonDatum5Tuple', 

333 'LatLonPrec3Tuple', 'LatLonPrec5Tuple', 

334 'NearestOn2Tuple', 'NearestOn3Tuple', 'NearestOn6Tuple', 'NearestOn8Tuple', 

335 'PhiLam2Tuple', 'PhiLam3Tuple', 'PhiLam4Tuple', 'Point3Tuple', 'Points2Tuple', 

336 'Reverse4Tuple', 'Triangle7Tuple', 'Triangle8Tuple', 'Trilaterate5Tuple', 

337 'UtmUps2Tuple', 'UtmUps5Tuple', 'UtmUps8Tuple', 'UtmUpsLatLon5Tuple', 

338 'Vector2Tuple', 'Vector3Tuple', 'Vector4Tuple'), 

339 nvectorBase=_i('NorthPole', 'SouthPole'), 

340 osgr=_i('Osgr', 'OSGRError', 'parseOSGR', 'toOsgr'), 

341 points=_i('LatLon_', 'LatLon2psxy', 'Numpy2LatLon', 'Shape2Tuple', 'Tuple2LatLon', 

342 'areaOf', 'boundsOf', 'centroidOf', 'fractional', 

343 'isclockwise', 'isconvex', 'isconvex_', 'isenclosedBy', 'ispolar', 

344 'luneOf', 'nearestOn5', 'perimeterOf', 'quadOf'), 

345 props=_i('Property', 'Property_RO', 'property_doc_', 

346 'property_RO', 'property_ROnce', 'property_ROver', 

347 'deprecated_class', 'deprecated_function', 'deprecated_method', 

348 'deprecated_Property_RO', 'deprecated_property_RO', 'DeprecationWarnings'), 

349 resections=_i('Collins5Tuple', 'ResectionError', 'Survey3Tuple', 'Tienstra7Tuple', 

350 'TriAngle5Tuple', 'TriSide2Tuple', 'TriSide4Tuple', 

351 'cassini', 'collins5', 'pierlot', 'pierlotx', 'tienstra7', 

352 'snellius3', 'wildberger3', 

353 'triAngle', 'triAngle5', 'triArea', 'triSide', 'triSide2', 'triSide4'), 

354 rhumb=_i(), # module only 

355 rhumb_aux_=_i('RhumbAux', 'RhumbLineAux'), 

356 rhumb_ekx=_i('Rhumb', 'RhumbLine'), 

357 rhumb_solve=_i('RhumbSolve', 'RhumbLineSolve', 'RhumbSolve7Tuple'), 

358 sphericalBase=_i(), # module only 

359 sphericalNvector=_i(), # module only 

360 sphericalTrigonometry=_i(), # module only 

361 simplify=_i('simplify1', 'simplifyRDP', 'simplifyRDPm', 'simplifyRW', 'simplifyVW', 'simplifyVWm'), 

362 solveBase=_i(), # module only 

363 streprs=_i('anstr', 'attrs', 'enstr2', 'fstr', 'fstrzs', 'hstr', 'instr', 

364 'lrstrip', 'pairs', 'reprs', 'strs', 'unstr'), 

365 trf=_i('RefFrame', 'RefFrames', 'TransformXform', 'TRFXform', 'TRFXform7Tuple', 

366 'date2epoch', 'epoch2date', 'trfTransform0', 'trfTransforms', 'trfXform'), 

367 triaxials=_i('BetaOmega2Tuple', 'BetaOmega3Tuple', 'Jacobi2Tuple', 

368 'JacobiConformal', 'JacobiConformalSpherical', 

369 'Triaxial', 'Triaxial_', 'TriaxialError', 'Triaxials', 'hartzell4'), 

370 units=_i('Azimuth', 'Band', 'Bearing', 'Bearing_', 'Bool', 

371 'Degrees', 'Degrees_', 'Degrees2', 'Distance', 'Distance_', 'Easting', 'Epoch', 

372 'Feet', 'FIx', 'Float_', 'Height', 'Height_', 'HeightX', 'Int_', 

373 'Lam', 'Lamd', 'Lat', 'Lat_', 'Lon', 'Lon_', 

374 'Meter', 'Meter_', 'Meter2', 'Meter3', 'Northing', 'Number_', 

375 'Phi', 'Phid', 'Precision_', 'Radians', 'Radians_', 'Radians2', 

376 'Radius_', 'Scalar', 'Scalar_', 'Zone'), 

377 unitsBase=_i('Float', 'Int', 'Radius', 'Str'), 

378 ups=_i('Ups', 'UPSError', 'parseUPS5', 'toUps8', 'upsZoneBand5'), 

379 utily=_i('acos1', 'acre2ha', 'acre2m2', 'asin1', 'atan1', 'atan1d', 'atan2b', 'atan2d', 

380 'chain2m', 'circle4', 'cot', 'cot_', 'cotd', 'cotd_', 

381 'degrees', 'degrees90', 'degrees180', 'degrees360', 'degrees2grades', 'degrees2m', 

382# 'degrees2grades as degrees2gons', 

383 'fathom2m', 'ft2m', 'furlong2m', 

384 'grades', 'grades400', 'grades2degrees', 'grades2radians', 

385# 'grades as gons', 'grades400 as gons400', 'grades2degrees as gons2degrees', 'grades2radians as gons2radians', 

386 'km2m', 'm2chain', 'm2degrees', 'm2fathom', 'm2ft', 'm2furlong', 

387 'm2km', 'm2NM', 'm2radians', 'm2SM', 'm2toise', 'm2yard', 'NM2m', 

388 'radians', 'radiansPI', 'radiansPI2', 'radiansPI_2', 'radians2m', 

389 'sincos2', 'SinCos2', 'sincos2_', 'sincos2d', 'sincos2d_', 'sincostan3', 'SM2m', 

390 'tand', 'tand_', 'tan_2', 'tanPI_2_2', 'toise2m', 'truncate', 

391 'unroll180', 'unrollPI', 

392 'wrap90', 'wrap180', 'wrap360', 'wrapPI_2', 'wrapPI', 'wrapPI2', 'wrap_normal', 

393 'yard2m'), 

394 utm=_i('Utm', 'UTMError', 'parseUTM5', 'toUtm8', 'utmZoneBand5'), 

395 utmups=_i('UtmUps', 'UTMUPSError', 'parseUTMUPS5', 'toUtmUps8', 

396 'utmupsValidate', 'utmupsValidateOK', 'utmupsZoneBand5'), 

397 utmupsBase=_i(), # module only 

398 vector2d=_i('Circin6Tuple', 'Circum3Tuple', 'Circum4Tuple', 'Meeus2Tuple', 'Radii11Tuple', 'Soddy4Tuple', 

399 'circin6', 'circum3', 'circum4_', 'meeus2', 'radii11', 'soddy4'), 

400 vector3d=_i('Vector3d', 'intersection3d3', 'iscolinearWith', 'nearestOn', 'nearestOn6', 'parse3d', 

401 'trilaterate2d2', 'trilaterate3d2'), 

402 vector3dBase=_i(), # module only 

403 webmercator=_i('Wm', 'WebMercatorError', 'parseWM', 'toWm', 'EasNorRadius3Tuple'), 

404 wgrs=_i('Georef', 'WGRSError'),) 

405 

406_ALL_DEPRECATED = _NamedEnum_RO(_name='_ALL_DEPRECATED', 

407 deprecated=_i('bases', 'datum', 'nvector', # DEPRECATED modules and ... 

408 'rhumbaux', 'rhumbBase', 'rhumbsolve', 'rhumbx'), # ... names 

409 deprecated_bases=_i('LatLonHeightBase', 'points2'), 

410 deprecated_classes=_i('ClipCS3Tuple', 'EasNorExact4Tuple', 'EcefCartesian', 'Fn_rt', 

411 'HeightIDW', 'HeightIDW2', 'HeightIDW3', 'Helmert7Tuple', 

412 'Lam_', 'LatLonExact4Tuple', 'NearestOn4Tuple', 'Ned3Tuple', 

413 'Phi_', 'RefFrameError', 'Rhumb7Tuple', 'RhumbOrder2Tuple', 

414 'Transform7Tuple', 'TriAngle4Tuple', 'UtmUps4Tuple', 'XDist'), 

415 deprecated_consterns=_i('EPS1_2', 'MANTIS', 'OK'), 

416 deprecated_datum=_i('Curvature2Tuple', 'Datum', 'Ellipsoid', 'Transform', # assert 

417 'Datums', 'Ellipsoids', 'Transforms', 

418 'R_FM', 'R_KM', 'R_M', 'R_MA', 'R_MB', 'R_NM', 'R_SM', 'R_VM'), 

419 deprecated_functions=_i('anStr', 'areaof', 'atand', 'bounds', # most of the DEPRECATED functions, except ... 

420 'clipCS3', 'clipDMS', 'clipStr', 'collins', 'copysign', # ... ellipsoidal, spherical flavors 

421 'decodeEPSG2', 'encodeEPSG', 'enStr2', 'equirectangular_', 'equirectangular3', 

422 'excessAbc', 'excessGirard', 'excessLHuilier', 

423 'false2f', 'falsed2f', 'float0', 'fStr', 'fStrzs', 'hypot3', 

424 'inStr', 'isenclosedby', 'istuplist', 

425 'joined', 'joined_', 'nearestOn3', 'nearestOn4', 

426 'parseUTM', 'perimeterof', 'polygon', 'scalar', 'simplify2', 

427 'tienstra', 'toUtm', 'triAngle4', 

428 'unsign0', 'unStr', 'utmZoneBand2'), 

429 deprecated_nvector=_i('LatLonNvectorBase', 'Nvector', 'sumOf', 'NorthPole', 'SouthPole'),) 

430 

431 

432class _ALL_MODS(_internals._MODS_Base): 

433 '''(INTERNAL) Memoized import of any L{pygeodesy} module. 

434 ''' 

435 def __getattr__(self, name): 

436 '''Get a C{pygeodesy} module or attribute by B{C{name}}. 

437 

438 @arg name: Un/qualified module or qualified attribute name (C{str}). 

439 

440 @raise ImportError: Importing module B{C{name}} failed. 

441 

442 @raise AttributeError: No attribute named B{C{name}}. 

443 ''' 

444 try: 

445 v = _lazy_dict[name] # package.__dict__ 

446 except KeyError: 

447 v = _lazy_module(name) # package.__getattr__ 

448 if _tailof(_dunder_nameof(v)) != name: 

449 try: 

450 v = getattr(v, _tailof(name)) 

451 except AttributeError: 

452 pass # XXX LazyAttributeError? 

453 return v 

454 

455 def getattr(self, name, *attr_dflt): # , parent=_pygeodesy_ 

456 '''Get an attribute of/or a C{pygeodesy} module. 

457 

458 @arg name: Un/qualified module name (C{str}). 

459 @arg attr_dflt: Optional attribute name (C{str}) and 

460 optional default value (any C{type}). 

461 

462 @return: The C{pygeodesy} module's attribute value. 

463 

464 @raise ImportError: Importing module B{C{name}} failed. 

465 

466 @raise AttributeError: No attribute named B{C{attr}}. 

467 ''' 

468 v = self.getmodule(name) 

469 if attr_dflt: 

470 v = getattr(v, *attr_dflt) 

471 return v 

472 

473 def getmodule(self, name, parent=_pygeodesy_): 

474 '''Get a C{pygeodesy} module or the C{__main__}. 

475 

476 @arg name: Un/qualified module name (C{str}). 

477 

478 @return: The C{pygeodesy} module. 

479 

480 @raise ImportError: Importing module B{C{name}} failed. 

481 ''' 

482 if _headof(name) != parent and not _dunder_ismain(name): 

483 name = _DOT_(parent, name) 

484 try: 

485 return _sys.modules[name] 

486 except KeyError: 

487 return _getmodule(name, parent) 

488 

489 def into(self, **mod_dunder_name_): 

490 '''Lazily import module C{mod} into module C{_dunder_name_} 

491 and set C{_dunder_name_._mod} to module C{mod}, I{once}. 

492 ''' 

493 class _Into(object): 

494 

495 def __getattr__(unused, name): 

496 mod, dun = self.errors._xkwds_item2(mod_dunder_name_) 

497 _mod = _UNDER_(NN, mod) 

498 d = self.getmodule(dun) # '__main__' OK 

499 i = _getattribute(d, _mod, dun) 

500 assert isinstance(i, _Into) 

501 m = self.getmodule(mod) 

502 setattr(d, _mod, m) # overwrite C{d._mod} 

503 return getattr(m, name) 

504 

505 return _Into() 

506 

507# @_Property_RO 

508# def _isBoolean(self): 

509# '''(INTERNAL) Get function C(.booleans.isBoolean}, I{once}. 

510# ''' 

511# return self.booleans.isBoolean 

512 

513 def items(self): # no module named 'items' 

514 '''Yield the modules imported so far. 

515 ''' 

516 _hd = _headof 

517 for n, m in _sys.modules.items(): 

518 if _hd(n) == _pygeodesy_: 

519 yield n, m 

520 

521_internals._MODS = _ALL_MODS = _ALL_MODS() # PYCHOK singleton 

522 

523__all__ = _ALL_LAZY.lazily 

524__version__ = '24.08.01' 

525 

526 

527def _ALL_OTHER(*objs): 

528 '''(INTERNAL) Get class and function B{C{objs}} for __all__. 

529 ''' 

530 def _interned(o): # intern'd base name 

531 n = _tailof(_dunder_nameof(o)) 

532 i = NN(_UNDER_, n, _UNDER_) # intern'd 

533 return getattr(_interns, i, n) 

534 

535 return tuple(map(_interned, objs)) # map2 

536 

537 

538if _FOR_DOCS: 

539 _ALL_DOCS = _ALL_OTHER 

540 # (INTERNAL) Only export B{C{objs.__name__}} when making the 

541 # docs to force C{epydoc} to include certain classes, methods, 

542 # functions and other names in the documentation. Using the 

543 # C{epydoc --private ...} command line option tends to include 

544 # too much internal documentation. 

545else: 

546 def _ALL_DOCS(*unused): 

547 return () 

548 

549 

550def _all_deprecates(): 

551 '''(INTERNAL) Build C{dict} of all deprecated imports. 

552 ''' 

553 _D = _ALL_DEPRECATES 

554 if not _D: 

555 _ALL_DEPRECATED.fill_D(_D, _all_deprecates) # see _all_imports() 

556 return _D 

557 

558_ALL_DEPRECATES = _Dict() # PYCHOK _ALL_DEPRECATED.imports() 

559 

560 

561def _all_imports(): 

562 '''(INTERNAL) Build C{dict} of all lazy imports. 

563 ''' 

564 # imports naming conventions stored below - [<key>] = <from>: 

565 # import <module> - [<module>] = <module> 

566 # from <module> import <attr> - [<attr>] = <module> 

567 # from pygeodesy import <attr> - [<attr>] = <attr> 

568 # from <module> import <attr> as <name> - [<name>] = <module>.<attr>. 

569 _D = _ALL_IMPORTS 

570 if not _D: 

571 _ALL_LAZY.fill_D(_D, _all_imports) # see _all_deprecates() 

572 return _D 

573 

574_ALL_IMPORTS = _Dict() # PYCHOK _ALL_LAZY.imports() 

575 

576 

577def _all_missing2(_all_): 

578 '''(INTERNAL) Get diffs between pygeodesy.__all__ and lazily._all_imports. 

579 ''' 

580 def _diff(one, two): 

581 return tuple(sorted(a for a in one if a not in two)) 

582 

583 _alzy = _Dict((a, a) for a in _ALL_INIT) 

584 _alzy.update(_all_imports()) # without _all_backups! 

585 return ((_DOT_(_lazily_, _all_imports.__name__), _diff(_all_, _alzy)), 

586 (_DOT_(_pygeodesy_, _dunder_all_), _diff(_alzy.keys(), _all_))) 

587 

588 

589def _getattribute(m, name, mod=_pygeodesy_): 

590 '''(INTERNAL) Get attr C{m.name}. 

591 ''' 

592 try: 

593 return getattr(m, name) 

594 except AttributeError: 

595 name = _DOT_(mod, name) 

596 # <https://GitHub.com/mrJean1/PyGeodesy/issues/76> 

597 raise LazyAttributeError(_no_(_attribute_), txt=name) 

598 

599 

600def _getattrof(attr_as): # .testDeprecated 

601 '''(INTERNAL) Get the C{"as name"} or C{"name"} of a lazy entry. 

602 ''' 

603 a_, _, as_ = attr_as.partition(__as__) 

604 return as_ or a_.rstrip(_DOT_) 

605 

606 

607def _getmodule(name, *parent): 

608 '''(INTERNAL) Wrapper for C{import_module}. 

609 ''' 

610 try: 

611 return import_module(name, parent) 

612 except ImportError: 

613 # <https://GitHub.com/mrJean1/PyGeodesy/issues/76> 

614 raise LazyImportError(_no_(_module_), txt=name) 

615 

616 

617# def _lazy_attributes(_dunder_name_): 

618# '''(INTERNAL) Return a function to C{B{__name__}.__getattr__(attr)} 

619# on lazily imported modules and sub-modules. 

620# ''' 

621# if _unlazy: 

622# raise AssertionError(_COMMASPACE_(_dunder_name_, _not_(_DEPRECATED_))) 

623# 

624# def _getattr(attr, *dflt): 

625# try: # a module name 

626# return _ALL_MODS.getmodule(attr) 

627# except (AttributeError, ImportError): 

628# return _ALL_MODS.getattr(_dunder_name_, attr, *dflt) 

629# 

630# return _getattr 

631 

632 

633_lazy_dict = {} # PYCHOK overwritten by _lazy_import2 

634 

635 

636def _lazy_import2(pack): # MCCABE 14 

637 '''Check for and set up C{lazy import}. 

638 

639 @arg pack: The name of the package (C{str}) performing the imports, 

640 to help resolving relative imports, usually C{__package__}. 

641 

642 @return: 2-Tuple C{(package, getattr)} of the importing package for 

643 easy reference within itself and the callable to be set to 

644 C{package.__getattr__}. 

645 

646 @raise LazyAttributeError: The package, module or attribute name is 

647 invalid or does not exist. 

648 

649 @raise LazyImportError: Lazy import not supported or not enabled or 

650 an import failed. 

651 

652 @note: This is I{Brett Cannon}'s function U{modutil.lazy_import 

653 <https://GitHub.com/brettcannon/modutil/blob/master/modutil.py>} 

654 modified to handle the C{__all__} and C{__dir__} attributes and 

655 call C{importlib.import_module(<module>.<name>, ...)} without 

656 causing a C{ModuleNotFoundError}. 

657 

658 @see: The original U{modutil<https://PyPI.org/project/modutil>}, 

659 U{PEP 562<https://www.Python.org/dev/peps/pep-0562>} and the 

660 U{new way<https://Snarky.Ca/lazy-importing-in-python-3-7/>}. 

661 ''' 

662 _DOT_ = _interns._DOT_ 

663 _SPACE_ = _interns._SPACE_ 

664 

665 if pack != _pygeodesy_ or _unlazy: # Python 3.7+ 

666 t = _no_(_DOT_(pack, _dunder_nameof(_lazy_import2))) # PYCHOK no cover 

667 raise LazyImportError(t, txt=_Pythonarchine(sep=_SPACE_)) 

668 

669 package, parent = _lazy_init2(pack) # _pygeodesy_ 

670 sub_packages = set((parent, NN) + tuple( 

671 _DOT_(parent, s) for s in _SUB_PACKAGES)) 

672 imports = _all_imports() 

673 deprecates = _all_deprecates() 

674 _dunder_package_ = '__package__' 

675 

676 def __getattr__(name): # __getattr__ only for Python 3.7+ 

677 # only called once for each undefined pygeodesy attribute 

678 mod = imports.get(name, NN) or deprecates.get(name, NN) 

679 if mod: 

680 # importlib.import_module() implicitly sets sub-modules 

681 # on this module as appropriate for direct imports (see 

682 # note in the _lazy_import2.__doc__ above). 

683 if mod.endswith(_DOT_): # import mod[.attr] as name 

684 mod, _, attr = mod[:-1].rpartition(_DOT_) 

685 else: # from mod import name 

686 attr = name 

687 v = _getmodule(_DOT_(pack, mod), parent) 

688 t = getattr(v, _dunder_package_, None) 

689 if t not in sub_packages: # invalid module package 

690 raise LazyImportError(_DOT_(mod, _dunder_package_), t) 

691 if attr: # get mod.attr 

692 v = _getattribute(v, attr, mod) 

693 

694 elif name in (_dunder_all_,): # XXX _dunder_dir_, _dunder_members_? 

695 v = _ALL_INIT + tuple(imports.keys()) 

696 else: # PYCHOK no cover 

697 t = _no_(_module_, _or_, _attribute_) 

698 # <https://GitHub.com/mrJean1/PyGeodesy/issues/76> 

699 raise LazyAttributeError(t, txt=_DOT_(parent, name)) 

700 

701 setattr(package, name, v) # package.__dict__[name] = val 

702 if isLazy > 1: 

703 t = _SPACE_(_lazily_imported_, _DOT_(parent, name)) 

704 if mod and _tailof(mod) != name: 

705 t = _SPACE_(t, _from_, _DOT_(NN, mod)) 

706 if isLazy > 2: 

707 try: # see C{_caller3} 

708 _, f, s = _caller3(2) 

709 t = _SPACE_(t, _by_, f, _line_, s) 

710 except ValueError: 

711 pass 

712 printf(t) # XXX print 

713 

714 return v # __getattr__ 

715 

716 global _lazy_dict, _lazy_module 

717 _lazy_dict = package.__dict__ 

718 _lazy_module = __getattr__ 

719 

720 return package, __getattr__ # _lazy_import2 

721 

722 

723# def _lazy_import_all(_dunder_name_): 

724# '''(INTERNAL) Return a function mimicking C{from B{__name__} import *}, 

725# of all items, see .deprecated.__init__ 

726# ''' 

727# if _unlazy: 

728# raise AssertionError(_COMMASPACE_(_dunder_name_, _not_(_DEPRECATED_))) 

729# 

730# _getattr = _lazy_attributes(_dunder_name_) # __name__.__getattr__ 

731# _import_start = _lazy_import_star(_dunder_name_, ALL_=_ALL_IMPORTS) 

732# 

733# def _import_all(attr, *dflt): 

734# return _import_star(_dunder_name_) if attr == _dunder_all_ else \ 

735# _getattr(attr, *dflt) 

736# 

737# return _import_all 

738 

739 

740def _lazy_import_as(_dunder_name_): 

741 '''(INTERNAL) Return a function to C{import B{__name__}.mod as mod} 

742 I{of modules only}, see .deprecated, .rhumb or get an attribute 

743 lazily exported by C{__name__}. 

744 ''' 

745 if _unlazy: 

746 return None 

747 

748 def _import_as(mod): 

749 try: 

750 return _ALL_MODS.getmodule(_DOT_(_dunder_name_, mod)) 

751 except ImportError: 

752 return _lazy_module(mod) 

753 

754 return _import_as 

755 

756 

757# def _lazy_import_star(_dunder_name_, ALL_=_ALL_DEPRECATES): 

758# '''(INTERNAL) Return a function to mimick C{from B{__name__} import *}, 

759# of all DEPRECATED items, see .deprecated, .testDeprecated 

760# ''' 

761# if _unlazy: 

762# raise AssertionError(_COMMASPACE_(_dunder_name_, _not_(_DEPRECATED_))) 

763# 

764# def _import_star(_into_): 

765# '''Do C{from B{__name__} import *} inside module C{B{__into__}}. 

766# ''' 

767# d = dict() 

768# nm = _tailof(_dunder_name_) 

769# _g = _ALL_MODS.getattr # pygeodesy.__getattr__ 

770# _h = _headof 

771# for a, m in ALL_.items(): 

772# if _h(m) == nm: 

773# try: 

774# d[a] = _g(m, a) 

775# except (AttributeError, ImportError): 

776# pass 

777# _sys.modules[_into_].__dict__.update(d) 

778# return d.keys() # imported names 

779# 

780# return _import_star 

781 

782 

783def _lazy_init2(pack): 

784 '''(INTERNAL) Initialize lazy import and set globals C{isLazy} and C{_unLazy0}. 

785 

786 @arg pack: The name of the package (C{str}) performing the imports, 

787 to help resolving relative imports, usually C{__package__}. 

788 

789 @return: 2-Tuple C{(package, parent)} with the importing C{package} 

790 for easy reference within itself and its name aka the 

791 C{parent}, same as B{C{pack}}. 

792 

793 @raise LazyImportError: Lazy import not supported or not enabled, 

794 an import failed or the package name is 

795 invalid or does not exist. 

796 

797 @note: Global C{isLazy} is set accordingly. 

798 ''' 

799 global isLazy, _unLazy0 

800 

801 z = _getenv(_PYGEODESY_LAZY_IMPORT_, None) 

802 if z is None: # _PYGEODESY_LAZY_IMPORT_ not set 

803 isLazy = 1 # ... but only by default on 3.7 

804 else: 

805 z = z.strip() # like PYTHONVERBOSE et.al. 

806 isLazy = int(z) if z.isdigit() else (1 if z else 0) 

807 

808 _unLazy0 = _unlazy or not isLazy # pre-3.7 or w/o lazy import 

809 

810 if isLazy < 1: # not enabled 

811 raise LazyImportError(_PYGEODESY_LAZY_IMPORT_, repr(z), txt_not_=_enabled_) 

812 if _getenv('PYTHONVERBOSE', None): # PYCHOK no cover 

813 isLazy += 1 

814 

815 try: # to initialize in Python 3+ 

816 package = import_module(pack) 

817 parent = package.__spec__.parent # __spec__ only in Python 3.7+ 

818 if parent != pack: # assert 

819 t = _COMMASPACE_(parent, _not_(pack)) # PYCHOK no cover 

820 raise AttributeError(_EQUALSPACED_('parent', t)) 

821 

822 except (AttributeError, ImportError) as x: 

823 isLazy = False # failed 

824 raise LazyImportError(_lazy_init2.__name__, pack, cause=x) 

825 

826 return package, parent 

827 

828 

829def _lazy_module(name): # overwritten by _lazy_import2 

830 '''(INTERNAL) Get or import a C{pygeodesy} module. 

831 ''' 

832 try: # most likely ... module has been imported 

833 m = _ALL_MODS.getmodule(name) 

834 except (AttributeError, ImportError) as x: 

835 raise LazyImportError(name, cause=x) 

836 _lazy_dict[name] = m # cache 

837 return m 

838 

839 

840# def _lazy_subs(_dunder_name_, force=_FOR_DOCS, over=False): 

841# '''(INTERNAL) Return the names of a package's sub-packages and 

842# update the package's C{__dict__} accordingly. 

843# ''' 

844# sm = dict() 

845# if force and not _dunder_ismain(_dunder_name_): 

846# nm = _tailof(_dunder_name_) 

847# _a = _ALL_MODS.getattr 

848# _m = _ALL_MODS.getmodule 

849# d = _a(_dunder_name_, _dunder_dict_, {}) 

850# for n in _a(_dunder_name_, _dunder_all_, ()): 

851# try: # n is a class name, get its mod name 

852# m = _a(_dunder_name_, n).__module__ 

853# n, s = m.split(_DOT_)[-2:] 

854# if n == nm and s not in sm: 

855# # like import m as s 

856# m = _m(m) 

857# sm[s] = m if over else d.get(s, m) 

858# except (AttributeError, ImportError, ValueError) as x: 

859# pass 

860# d.update(sm) 

861# 

862# return _ALL_OTHER(*sm.values()) 

863 

864# del _i, _i0 

865 

866# _ = _ALL_MODS.errors # force import pygeodesy.errors 

867 

868if _dunder_ismain(__name__): # PYCHOK no cover 

869 

870 from pygeodesy.internals import _versions 

871 from timeit import timeit 

872 

873 def t1(): 

874 from pygeodesy.trf import RefFrame 

875 return RefFrame 

876 

877 def t2(): 

878 return _ALL_MODS.trf.RefFrame 

879 

880 assert t1() is t2() # prime each 

881 

882 t1 = timeit(t1, number=1000000) 

883 t2 = timeit(t2, number=1000000) 

884 printf('%.6f import vs %.6f _ALL_MODS: %.2fX, %s', t1, t2, t1 / t2, _versions()) 

885 

886# del t1, t2, timeit, v 

887 

888# % python3.13 -W ignore -m pygeodesy.lazily 

889# 0.102670 import vs 0.076113 _ALL_MODS: 1.35X, pygeodesy 24.8.4 Python 3.13.0b4 64bit arm64 macOS 14.5 

890 

891# % python3.12 -W ignore -m pygeodesy.lazily 

892# 0.132801 import vs 0.079125 _ALL_MODS: 1.68X, pygeodesy 24.8.4 Python 3.12.4 64bit arm64 macOS 14.5 

893 

894# % python3.11 -W ignore -m pygeodesy.lazily 

895# 0.381723 import vs 0.251589 _ALL_MODS: 1.52X, pygeodesy 24.8.4 Python 3.11.5 64bit arm64 macOS 14.4.1 

896 

897# % python3.8 -W ignore -m pygeodesy.lazily 

898# 0.570353 import vs 0.382842 _ALL_MODS: 1.49X, pygeodesy 24.8.4 Python 3.8.10 64bit arm64_x86_64 macOS 10.16 

899 

900# % python2 -m pygeodesy.lazily 

901# 1.213805 import vs 0.474075 _ALL_MODS: 2.56X, pygeodesy 24.8.4 Python 2.7.18 64bit arm64_x86_64 macOS 10.16 

902 

903# **) MIT License 

904# 

905# Copyright (C) 2018-2024 -- mrJean1 at Gmail -- All Rights Reserved. 

906# 

907# Permission is hereby granted, free of charge, to any person obtaining a 

908# copy of this software and associated documentation files (the "Software"), 

909# to deal in the Software without restriction, including without limitation 

910# the rights to use, copy, modify, merge, publish, distribute, sublicense, 

911# and/or sell copies of the Software, and to permit persons to whom the 

912# Software is furnished to do so, subject to the following conditions: 

913# 

914# The above copyright notice and this permission notice shall be included 

915# in all copies or substantial portions of the Software. 

916# 

917# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 

918# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 

919# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 

920# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 

921# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 

922# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 

923# OTHER DEALINGS IN THE SOFTWARE.