# Coverage for pygeodesy/lazily.py : 96%

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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_, _COLONSPACE_, \ _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_ = 'pygeodesy' _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 in .__init__ class LazyImportError(ImportError): '''Raised if C{lazy import} is not supported, disabled or failed some other way. ''' def __init__(self, *name_value, **txt): _ALL_MODS.errors._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 k = _ALL_MODS.streprs.Fmt.SQUARE(_imports_, key) raise AssertionError('%s: %r, not %r' % (k, val, value)) 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: t = self._DOT_(attr) raise AttributeError(_COLONSPACE_(t, _doesn_t_exist_)) def __setattr__(self, attr, value): # PYCHOK no cover t = _EQUALSPACED_(self._DOT_(attr), value) raise TypeError(_COLONSPACE_(t, _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', 'iscomplex', 'isfinite', 'isidentifier', 'isinf', 'isint', 'iskeyword', 'isnan', 'isnear0', 'isnear1', 'isneg0', 'isnon0', 'isodd', 'isscalar', 'issequence', 'isstr', 'issubclassof', 'len2', 'map1', 'map2', 'neg', 'neg_', 'signOf', 'splice', 'ub2str', 'unsigned0'), cartesianBase=(), # module only 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', 'collins', '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', 'tienstra', 'toUtm', 'unsign0', 'unStr', 'utmZoneBand2'), dms=('F_D', 'F_DM', 'F_DMS', 'F_DEG', 'F_MIN', 'F_SEC', 'F_D60', 'F__E', 'F__F', 'F__G', 'F_RAD', 'F_D_', 'F_DM_', 'F_DMS_', 'F_DEG_', 'F_MIN_', 'F_SEC_', 'F_D60_', 'F__E_', 'F__F_', 'F__G_', 'F_RAD_', 'F_D__', 'F_DM__', 'F_DMS__', 'F_DEG__', 'F_MIN__', 'F_SEC__', 'F_D60__', 'F__E__', 'F__F__', 'F__G__', 'F_RAD__', 'S_DEG', 'S_MIN', 'S_SEC', 'S_RAD', 'S_SEP', 'bearingDMS', 'clipDegrees', 'clipRadians', 'compassDMS', 'compassPoint', 'degDMS', 'latDMS', 'latlonDMS', 'latlonDMS_', 'lonDMS', 'normDMS', 'parseDDDMMSS', 'parseDMS', 'parseDMS2', 'parse3llh', 'parseRad', 'precision', 'toDMS'), ecef=('EcefError', 'EcefFarrell21', 'EcefFarrell22', 'EcefKarney', 'EcefMatrix', 'EcefSudano', 'Ecef9Tuple', 'EcefVeness', 'EcefYou'), elevations=('Elevation2Tuple', 'GeoidHeight2Tuple', 'elevation2', 'geoidHeight2'), ellipsoidalBase=(), # module only ellipsoidalBaseDI=(), # module only ellipsoidalExact=(), # module only ellipsoidalGeodSolve=(), # module only ellipsoidalKarney=(), # module only ellipsoidalNvector=(), # module only 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', 'ParseError', 'PointsError', 'RangeError', 'SciPyError', 'SciPyWarning', 'TRFError', 'TriangleError', 'UnitError', 'VectorError', 'crosserrors', 'exception_chaining', 'limiterrors', 'rangerrors'), etm=('Etm', 'ETMError', 'ExactTransverseMercator', 'EasNorExact4Tuple', 'LatLonExact4Tuple', 'parseETM5', 'toEtm8'), fmath=('Fdot', 'Fhorner', 'Fpolynomial', 'cbrt', 'cbrt2', 'euclid', 'euclid_', 'facos1', 'fasin1', 'fatan', 'fatan1', 'fatan2', 'favg', 'fdot', 'fdot3', 'fmean', 'fmean_', 'fhorner', 'fidw', 'fpolynomial', 'fpowers', 'fprod', 'frange', 'freduce', 'hypot', 'hypot_', 'hypot1', 'hypot2', 'hypot2_', 'norm2', 'norm_', 'sqrt0', 'sqrt3', 'sqrt_a'), formy=('Radical2Tuple', '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', 'opposing', 'opposing_', 'philam2n_xyz', 'radical2', 'thomas', 'thomas_', 'vincentys', 'vincentys_'), frechet=('Frechet', 'FrechetDegrees', 'FrechetError', 'FrechetRadians', 'FrechetCosineAndoyerLambert', 'FrechetCosineForsytheAndoyerLambert', 'FrechetCosineLaw', 'FrechetDistanceTo', 'FrechetEquirectangular', 'FrechetEuclidean', 'FrechetExact', 'FrechetFlatLocal', 'FrechetFlatPolar', 'FrechetHaversine', 'FrechetHubeny', 'FrechetKarney', 'FrechetThomas', 'FrechetVincentys', 'Frechet6Tuple', 'frechet_'), fstats=('Fcook', 'Flinear', 'Fwelford'), fsums=('Fsum', 'Fsum2Tuple', 'ResidualError', 'fsum', 'fsum_', 'fsum1', 'fsum1_',), 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'), latlonBase=(), # module only lazily=('LazyImportError', 'isLazy', 'print_', 'printf'), lcc=('Conic', 'Conics', 'Lcc', 'LCCError', 'toLcc'), ltp=('Attitude', 'AttitudeError', 'Frustum', 'LocalCartesian', 'LocalError', 'Ltp', 'tyr3d'), ltpTuples=('Aer', 'Aer4Tuple', 'Attitude4Tuple', 'Enu', 'Enu4Tuple', 'Footprint5Tuple', 'Local9Tuple', 'Ned', 'Ned3Tuple', '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', 'NearestOn2Tuple', 'NearestOn3Tuple', 'NearestOn5Tuple', 'NearestOn6Tuple', 'NearestOn8Tuple', 'PhiLam2Tuple', 'PhiLam3Tuple', 'PhiLam4Tuple', 'Point3Tuple', 'Points2Tuple', 'Triangle7Tuple', 'Triangle8Tuple', 'Trilaterate5Tuple', 'UtmUps2Tuple', 'UtmUps5Tuple', 'UtmUps8Tuple', 'UtmUpsLatLon5Tuple', 'Vector2Tuple', 'Vector3Tuple', 'Vector4Tuple'), nvectorBase=(), # module only osgr=('Osgr', 'OSGRError', 'parseOSGR', 'toOsgr'), points=('LatLon_', 'LatLon2psxy', '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'), resections=('Collins5Tuple', 'ResectionError', 'Survey3Tuple', 'Tienstra7Tuple', 'TriAngle4Tuple', 'TriSide2Tuple', 'TriSide4Tuple', 'cassini', 'collins5', 'pierlot', 'tienstra7', 'snellius3', 'wildberger3', 'triAngle', 'triAngle4', 'triSide', 'triSide2', 'triSide4'), sphericalBase=(), # module only 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', 'cot', 'cot_', 'cotd', 'cotd_', 'degrees', 'degrees90', 'degrees180', 'degrees360', 'degrees2grades', 'degrees2m', # 'degrees2grades as degrees2gons', 'fathom2m', 'ft2m', 'furlong2m', 'grades', 'grades400', 'grades2degrees', 'grades2radians', # 'grades as gons', 'grades400 as gons400', 'grades2degrees as gons2degrees', 'grades2radians as gons2radians', 'm2chain', 'm2degrees', 'm2fathom', 'm2ft', 'm2furlong', 'm2km', 'm2NM', 'm2radians', 'm2SM', 'm2toise', 'm2yard', 'radians', 'radiansPI', 'radiansPI2', 'radiansPI_2', 'radians2m', 'sincos2', 'sincos2_', 'sincos2d', 'sincos2d_', 'tand', 'tand_', 'tan_2', 'tanPI_2_2', 'toise2m', 'unroll180', 'unrollPI', 'wrap90', 'wrap180', 'wrap360', 'wrapPI_2','wrapPI', 'wrapPI2', 'yard2m'), utm=('Utm', 'UTMError', 'parseUTM5', 'toUtm8', 'utmZoneBand5'), utmups=('UtmUps', 'UTMUPSError', 'parseUTMUPS5', 'toUtmUps8', 'utmupsValidate', 'utmupsValidateOK', 'utmupsZoneBand5'), utmupsBase=(), # module only vector2d=('Circin6Tuple', 'Circum3Tuple', 'Circum4Tuple', 'Meeus2Tuple', 'Radii11Tuple', 'Soddy4Tuple', 'circin6', 'circum3', 'circum4_', 'meeus2', 'radii11', 'soddy4'), vector3d=('Vector3d', 'intersection3d3', 'iscolinearWith', 'nearestOn', 'nearestOn6', 'parse3d', 'trilaterate2d2', 'trilaterate3d2'), vector3dBase=(), # module only 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')) class _ALL_MODS(object): '''(INTERNAL) Memoize import of any L{pygeodesy} module. ''' def _DOT_(self, name): # PYCHOK no cover return _DOT_(self.__class__.__name__, name) def __getattr__(self, name): try: n = _DOT_(_pygeodesy_, name) m = import_module(n, _pygeodesy_) except ImportError as x: raise LazyImportError(str(x), txt=_doesn_t_exist_) return self._insert(name, m) def __setattr__(self, name, value): # PYCHOK no cover t = _EQUALSPACED_(self._DOT_(name), repr(value)) raise AttributeError(_COLONSPACE_(t, _immutable_)) def _insert(self, name, module): # see _lazy_import2 below try: # after .props.Property_RO.__get__ if name not in self.__dict__: self.__dict__[name] = module except (AttributeError, KeyError): pass return module def items(self): # no module named 'items' '''Yield the modules imported so far. ''' for n, m in self.__dict__.items(): yield n, m _ALL_MODS = _ALL_MODS() # PYCHOK singleton __all__ = _ALL_LAZY.lazily __version__ = '22.03.08' def _ALL_OTHER(*objs): '''(INTERNAL) Get class and function B{C{objs}} for __all__. ''' from pygeodesy import interns # PYCHOK import def _dun(o): n = _dunder_name(o).rsplit(_DOT_, 1)[-1] i = NN(_UNDER_, n, _UNDER_) # intern'd return getattr(interns, i, 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(package_name): # MCCABE 15 '''Check for and set up C{lazy import}. @arg package_name: 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 package_name != _pygeodesy_ or _sys_version_info2 < (3, 7): # not supported before 3.7 t = _no_(_DOT_(package_name, _lazy_import2.__name__)) raise LazyImportError(t, txt=_Python_(_sys.version)) 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_import2.__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) _ALL_MODS._insert(mod, imported) # 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: pass printf('# lazily imported %s%s', _DOT_(parent, name), z) return imported # __getattr__ return package, __getattr__ # _lazy_import2 def _lazy_init2(package_name): '''(INTERNAL) Try to initialize lazy import. @arg package_name: The name of the package (C{str}) performing the imports, to help facilitate resolving relative imports, usually C{__package__}. @return: 2-Tuple C{(package, parent)} of the importing C{package} for easy reference within itself and its name aka the C{parent}, same as B{C{package_name}}. @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(package_name) parent = package.__spec__.parent # __spec__ only in Python 3.7+ if parent != package_name: # assert t = _COMMASPACE_(parent, _not_(package_name)) raise AttributeError(_EQUALSPACED_('parent', t)) except (AttributeError, ImportError) as x: isLazy = False # failed raise LazyImportError(_lazy_init2.__name__, package_name, txt=str(x)) return package, parent def print_(*args, **nl_nt_prefix_end_file_flush_sep): # PYCHOK no cover '''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)) if __name__ == '__main__': from timeit import timeit def t1(): from pygeodesy.trf import RefFrame return RefFrame def t2(): return _ALL_MODS.trf.RefFrame t1(); t2() # PYCHOK prime each t1 = timeit(t1, number=1000000) t2 = timeit(t2, number=1000000) v = _Python_(_sys.version) printf('%.8f vs %.8f: %.3fX slower, %s', t1, t2, t1 / t2, v) # _ALL_MODS above in t2 is 5X to 12X faster than t1 with # Python 2.7.18 and 3.10.2 (on M1 Apple Silicon). The # implementation below is far too verbose to be worthwhile. # class _Property_RO(property): # '''(INTERNAL) Sub-set of L{pygeodesy.props.Property_RO}. # ''' # def __init__(self, method): # self.method = method # self.name = n = method.__name__ # d = _N_A_ if not _FOR_DOCS else \ # '(INTERNAL) Get and cache module L{%s}.' % (n,) # property.__init__(self, self._fget, None, self._fdel, d) # # def _fdel(self, inst): # PYCHOK no cover # '''Zap the I{cached/memoized} C{property} value. # ''' # self._update(inst, None) # PYCHOK no cover # # def _fget(self, inst): # getter # '''Get and I{cache/memoize} the C{property} value. # ''' # try: # to get the value cached in instance' __dict__ # return inst.__dict__[self.name] # except KeyError: # # cache the value in the instance' __dict__ # inst.__dict__[self.name] = val = self.method(inst) # return val # # def __get__(self, inst, *unused): # PYCHOK 2 vs 3 args # if inst is None: # return self # try: # to get the cached value immediately # return inst.__dict__[self.name] # except (AttributeError, KeyError): # return self._fget(inst) # # def _update(self, inst, *unused): # PYCHOK no cover # '''(INTERNAL) Zap the I{cached/memoized} C{inst.__dict__[name]} item. # ''' # inst.__dict__.pop(self.name, None) # name, NOT _name # # def deleter(self, fdel): # PYCHOK no cover # '''Throws a C{LazyImportError}, always. # ''' # raise self._Error(_invalid_, self.deleter, fdel) # # def getter(self, fget): # PYCHOK no cover # '''Throws a C{LazyImportError}, always. # ''' # raise self._Error(_invalid_, self.getter, fget) # # def reload(self): # PYCHOK no cover # '''Zap all cached module, forcing a reload. # ''' # _ALL_MODS.props._update_all(_ALL_MODS, Base=_Property_RO) # # def setter(self, fset): # PYCHOK no cover # '''Throws a C{LazyImportError}, always. # ''' # raise self._Error(_immutable_, self.setter, fset) # # def _Error(self, kind, xter, farg): # PYCHOK no cover # '''(INTERNAL) Return a C{LazyImportError} instance. # ''' # e = _SPACE_(kind, self.__class__.__name__) # n = _DOT_(self.name, xter.__name__) # t = _SPACE_(n, farg.__name__) # return LazyImportError(e, txt=t) # class _ALL_MODS(object): # '''(INTERNAL) Memoized imports of about half the L{pygeodesy} modules. # ''' # @_Property_RO # def albers(self): # import pygeodesy.albers as m # return m # # @_Property_RO # def azimuthal(self): # import pygeodesy.azimuthal as m # return m # # @_Property_RO # def cartesianBase(self): # import pygeodesy.cartesianBase as m # return m # # # ... etc. # # @_Property_RO # def webmercator(self): # import pygeodesy.webmercator as m # return m # **) MIT License # # Copyright (C) 2018-2022 -- 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.