# Coverage for pygeodesy/errors.py : 95%

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Error, exception classes and functions to format PyGeodesy errors, including the setting of I{exception chaining} in Python 3+. By default, I{exception chaining} is turned I{off}. To enable I{exception chaining}, use command line option C{python -X dev} I{OR} set env var C{PYTHONDEVMODE} to C{1} or any non-empyty string I{OR} set env var C{PYGEODESY_EXCEPTION_CHAINING=std} or to any other non-empty string. ''' from pygeodesy.interns import MISSING, NN, _a_, _an_, _and_, _COLON_, \ _COLONSPACE_, _COMMASPACE_, _datum_, \ _ellipsoidal_, _EQUAL_, _incompatible_, \ _invalid_, _len_, _name_, _no_, _not_, _or_, \ _SPACE_, _specified_, _UNDER_, _value_, \ _vs_, _with_ from pygeodesy.lazily import _ALL_LAZY, _ALL_MODS as _MODS, _getenv, \ _pairs, _PYTHON_X_DEV __all__ = _ALL_LAZY.errors # _ALL_DOCS('_InvalidError', '_IsnotError') _UNDER __version__ = '22.10.08' _default_ = 'default' _kwargs_ = 'kwargs' # XXX _kwds_? _limiterrors = True # imported by .formy _multiple_ = 'multiple' _name_value_ = repr('name=value') _rangerrors = True # imported by .dms _vs__ = _SPACE_(NN, _vs_, NN) try: _exception_chaining = None # not available _ = Exception().__cause__ # Python 3+ exception chaining if _PYTHON_X_DEV or _getenv('PYGEODESY_EXCEPTION_CHAINING', NN): # == _std_ _exception_chaining = True # turned on, std raise AttributeError # allow exception chaining _exception_chaining = False # turned off def _error_cause(inst, cause=None): '''(INTERNAL) Set or avoid Python 3+ exception chaining. Setting C{inst.__cause__ = None} is equivalent to syntax C{raise Error(...) from None} to avoid exception chaining. @arg inst: An error instance (caught C{Exception}). @kwarg cause: A previous error instance (caught C{Exception}) or C{None} to avoid exception chaining. @see: Alex Martelli, et.al., "Python in a Nutshell", 3rd Ed., page 163, O'Reilly, 2017, U{PEP-3134<https://www.Python.org/dev/peps/pep-3134>}, U{here<https://StackOverflow.com/questions/17091520/how-can-i-more- easily-suppress-previous-exceptions-when-i-raise-my-own-exception>} and U{here<https://StackOverflow.com/questions/1350671/ inner-exception-with-traceback-in-python>}. ''' inst.__cause__ = cause # None, no exception chaining return inst except AttributeError: # Python 2+ def _error_cause(inst, **unused): # PYCHOK expected return inst # no-op class _AssertionError(AssertionError): '''(INTERNAL) Format an C{AssertionError} with/-out exception chaining. ''' def __init__(self, *args, **kwds): _error_init(AssertionError, self, args, **kwds) class _AttributeError(AttributeError): '''(INTERNAL) Format an C{AttributeError} with/-out exception chaining. ''' def __init__(self, *args, **kwds): _error_init(AttributeError, self, args, **kwds) class _ImportError(ImportError): '''(INTERNAL) Format an C{ImportError} with/-out exception chaining. ''' def __init__(self, *args, **kwds): _error_init(ImportError, self, args, **kwds) class _IndexError(IndexError): '''(INTERNAL) Format an C{IndexError} with/-out exception chaining. ''' def __init__(self, *args, **kwds): _error_init(IndexError, self, args, **kwds) class _KeyError(KeyError): '''(INTERNAL) Format a C{KeyError} with/-out exception chaining. ''' def __init__(self, *args, **kwds): # txt=_invalid_ _error_init(KeyError, self, args, **kwds) class _NameError(NameError): '''(INTERNAL) Format a C{NameError} with/-out exception chaining. ''' def __init__(self, *args, **kwds): _error_init(NameError, self, args, **kwds) class _NotImplementedError(NotImplementedError): '''(INTERNAL) Format a C{NotImplementedError} with/-out exception chaining. ''' def __init__(self, *args, **kwds): _error_init(NotImplementedError, self, args, **kwds) class _OverflowError(OverflowError): '''(INTERNAL) Format an C{OverflowError} with/-out exception chaining. ''' def __init__(self, *args, **kwds): # txt=_invalid_ _error_init(OverflowError, self, args, **kwds) class _TypeError(TypeError): '''(INTERNAL) Format a C{TypeError} with/-out exception chaining. ''' def __init__(self, *args, **kwds): _error_init(TypeError, self, args, fmt_name_value='type(%s) (%r)', **kwds) class _TypesError(_TypeError): '''(INTERNAL) Format a C{TypeError} with/-out exception chaining. ''' def __init__(self, name, value, *Types, **kwds): t = _not_(_an(_or(*(t.__name__ for t in Types)))) _TypeError.__init__(self, name, value, txt=t, **kwds) class _ValueError(ValueError): '''(INTERNAL) Format a C{ValueError} with/-out exception chaining. ''' def __init__(self, *args, **kwds): # ..., cause=None, txt=_invalid_, ... _error_init(ValueError, self, args, **kwds) class _ZeroDivisionError(ZeroDivisionError): '''(INTERNAL) Format a C{ZeroDivisionError} with/-out exception chaining. ''' def __init__(self, *args, **kwds): _error_init(ZeroDivisionError, self, args, **kwds) class CrossError(_ValueError): '''Error raised for zero or near-zero vectorial cross products, occurring for coincident or colinear points, paths or bearings. ''' pass class IntersectionError(_ValueError): # in .ellipsoidalBaseDI, .formy, ... '''Error raised for path or circle intersection issues. ''' def __init__(self, *args, **kwds): '''New L{IntersectionError}. ''' if args: _ValueError.__init__(self, _SPACE_(*args), **kwds) else: _ValueError.__init__(self, **kwds) class LenError(_ValueError): # in .ecef, .fmath, .heights, .iters, .named '''Error raised for mis-matching C{len} values. ''' def __init__(self, where, **lens_txt): # txt=None '''New L{LenError}. @arg where: Object with C{.__name__} attribute (C{class}, C{method}, or C{function}). @kwarg lens_txt: Two or more C{name=len(name)} pairs (C{keyword arguments}). ''' x, txt = _xkwds_pop_(lens_txt, cause=None, txt=_invalid_) ns, vs = zip(*itemsorted(lens_txt)) # unzip ns = _COMMASPACE_.join(ns) t = _MODS.streprs.Fmt.PAREN(where.__name__, ns) vs = _vs__.join(map(str, vs)) t = _SPACE_(t, _len_, vs) _ValueError.__init__(self, t, txt=txt, cause=x) class LimitError(_ValueError): '''Error raised for lat- or longitudinal deltas exceeding the B{C{limit}} in functions L{pygeodesy.equirectangular} and L{pygeodesy.equirectangular_} and several C{nearestOn*} and C{simplify*} functions or methods. ''' pass class MGRSError(_ValueError): '''Military Grid Reference System (MGRS) parse or other L{Mgrs} issue. ''' pass class NumPyError(_ValueError): '''Error raised for C{NumPy} issues. ''' pass class ParseError(_ValueError): # in .dms, .elevations, .utmupsBase '''Error parsing degrees, radians or several other formats. ''' pass class PointsError(_ValueError): # in .clipy, .frechet, ... '''Error for an insufficient number of points. ''' pass class RangeError(_ValueError): # in .dms, .ellipsoidalBase, .geoids, .units, .ups, .utm, .utmups '''Error raised for lat- or longitude values outside the B{C{clip}}, B{C{clipLat}}, B{C{clipLon}} or B{C{limit}} range in function L{pygeodesy.clipDegrees}, L{pygeodesy.clipRadians}, L{pygeodesy.parse3llh}, L{pygeodesy.parseDMS}, L{pygeodesy.parseDMS2} or L{pygeodesy.parseRad}. @see: Function L{pygeodesy.rangerrors}. ''' pass class TriangleError(_ValueError): # in .resections, .vector2d '''Error raised for triangle, inter- or resection issues. ''' pass class SciPyError(PointsError): '''Error raised for C{SciPy} issues. ''' pass class SciPyWarning(PointsError): '''Error thrown for C{SciPy} warnings. To raise C{SciPy} warnings as L{SciPyWarning} exceptions, Python C{warnings} must be filtered as U{warnings.filterwarnings('error') <https://docs.Python.org/3/library/warnings.html#the-warnings-filter>} I{prior to} C{import scipy} OR by setting env var U{PYTHONWARNINGS <https://docs.Python.org/3/using/cmdline.html#envvar-PYTHONWARNINGS>} OR by invoking C{python} with command line option U{-W<https://docs. Python.org/3/using/cmdline.html#cmdoption-w>} set to C{-W error}. ''' pass class TRFError(_ValueError): # in .ellipsoidalBase, .trf, .units '''Terrestrial Reference Frame (TRF), L{Epoch}, L{RefFrame} or L{RefFrame} conversion issue. ''' pass class UnitError(_ValueError): # in .named, .units '''Default exception for L{units} issues. ''' pass class VectorError(_ValueError): # in .nvectorBase, .vector3d, .vector3dBase '''L{Vector3d}, C{Cartesian*} or C{*Nvector} issues. ''' pass def _an(noun): '''(INTERNAL) Prepend an article to a noun based on the pronounciation of the first letter. ''' a = _an_ if noun[:1].lower() in 'aeinoux' else _a_ return _SPACE_(a, noun) def _and(*words): '''(INTERNAL) Join C{words} with C{", "} and C{" and "}. ''' return _and_or(_and_, *words) def _and_or(last, *words): '''(INTERNAL) Join C{words} with C{", "} and C{B{last}}. ''' t, w = NN, list(words) if w: t = w.pop() if w: w = _COMMASPACE_.join(w) t = _SPACE_(w, last, t) return t def crosserrors(raiser=None): '''Report or ignore vectorial cross product errors. @kwarg raiser: Use C{True} to throw or C{False} to ignore L{CrossError} exceptions. Use C{None} to leave the setting unchanged. @return: Previous setting (C{bool}). @see: Property C{Vector3d[Base].crosserrors}. ''' B = _MODS.vector3dBase.Vector3dBase t = B._crosserrors # XXX class attr! if raiser in (True, False): B._crosserrors = raiser return t def _error_init(Error, inst, args, fmt_name_value='%s (%r)', txt=NN, cause=None, **kwds): # by .lazily '''(INTERNAL) Format an error text and initialize an C{Error} instance. @arg Error: The error super-class (C{Exception}). @arg inst: Sub-class instance to be __init__-ed (C{_Exception}). @arg args: Either just a value or several name, value, ... positional arguments (C{str}, any C{type}), in particular for name conflicts with keyword arguments of C{error_init} or which can't be given as C{name=value} keyword arguments. @kwarg fmt_name_value: Format for (name, value) (C{str}). @kwarg txt: Optional explanation of the error (C{str}). @kwarg cause: Optional, caught error (L{Exception}), for exception chaining (supported in Python 3+). @kwarg kwds: Additional C{B{name}=value} pairs, if any. ''' def _fmtuple(pairs): return tuple(fmt_name_value % t for t in pairs) t, n = (), len(args) if n > 2: s = _MODS.basics.isodd(n) t = _fmtuple(zip(args[0::2], args[1::2])) if s: # XXX _xzip(..., strict=s) t += args[-1:] elif n == 2: t = (fmt_name_value % args), elif n: # == 1 t = str(args[0]), if kwds: t += _fmtuple(itemsorted(kwds)) t = _or(*t) if t else _SPACE_(_name_value_, MISSING) if txt is not None: x = str(txt) or (str(cause) if cause else _invalid_) C = _COMMASPACE_ if _COLON_ in t else _COLONSPACE_ t = C(t, x) # else: # LenError, _xzip, .dms, .heights, .vector2d # x = NN # XXX or t? Error.__init__(inst, t) # inst.__x_txt__ = x # hold explanation _error_cause(inst, cause=cause if _exception_chaining else None) _error_under(inst) def _error_under(inst): '''(INTERNAL) Remove leading underscore from instance' class name. ''' n = inst.__class__.__name__ if n.startswith(_UNDER_): inst.__class__.__name__ = n.lstrip(_UNDER_) return inst def exception_chaining(error=None): '''Get an error's I{cause} or the exception chaining setting. @kwarg error: An error instance (C{Exception}) or C{None}. @return: If C{B{error} is None}, return C{True} if exception chaining is enabled for PyGeodesy errors, C{False} if turned off and C{None} if not available. If B{C{error}} is not C{None}, return it's error I{cause} or C{None}. @note: To enable exception chaining for C{pygeodesy} errors, set env var C{PYGEODESY_EXCEPTION_CHAINING} to any non-empty value prior to C{import pygeodesy}. ''' return _exception_chaining if error is None else \ getattr(error, '__cause__', None) def _incompatible(this): '''(INTERNAL) Format an C{"incompatible with ..."} text. ''' return _SPACE_(_incompatible_, _with_, this) def _InvalidError(Error=_ValueError, **txt_name_values_cause): # txt=_invalid_, name=value [, ...] '''(INTERNAL) Create an C{Error} instance. @kwarg Error: The error class or sub-class (C{Exception}). @kwarg txt_name_values: One or more C{B{name}=value} pairs and optionally, keyword argument C{B{txt}=str} to override the default C{B{txt}='invalid'} and C{B{cause}=None} for exception chaining. @return: An B{C{Error}} instance. ''' return _XError(Error, **txt_name_values_cause) def isError(obj): '''Check a (caught) exception. @arg obj: The exception C({Exception}). @return: C{True} if B{C{obj}} is a C{pygeodesy} error, C{False} if B{C{obj}} is a standard Python error of C{None} if neither. ''' return True if isinstance(obj, _XErrors) else ( False if isinstance(obj, Exception) else None) def _IsnotError(*nouns, **name_value_Error_cause): # name=value [, Error=TypeError, cause=None] '''Create a C{TypeError} for an invalid C{name=value} type. @arg nouns: One or more expected class or type names, usually nouns (C{str}). @kwarg name_value_Error_cause: One C{B{name}=value} pair and optionally, keyword argument C{B{Error}=TypeError} to override the default and C{B{cause}=None} for exception chaining. @return: A C{TypeError} or an B{C{Error}} instance. ''' x, Error = _xkwds_pop_(name_value_Error_cause, cause=None, Error=TypeError) n, v = _xkwds_popitem(name_value_Error_cause) if name_value_Error_cause \ else (_name_value_, MISSING) # XXX else tuple(...) n = _MODS.streprs.Fmt.PARENSPACED(n, repr(v)) t = _not_(_an(_or(*nouns)) if nouns else _specified_) return _XError(Error, n, txt=t, cause=x) def itemsorted(adict, *args, **asorted_reverse): '''Return the items of C{B{adict}} sorted I{alphabetically, case-insensitively} and in I{ascending} order. @arg args: Optional argument(s) for method C{B{adict}.items(B*{args})}. @kwarg asorted_reverse: Use keyword argument C{B{asorted}=False} for I{case-sensitive} sorting and C{B{reverse}=True} for results in C{descending} order. ''' def _un(item): return item[0].lower() # see .rhumb.Rhumb and ._RhumbLine a, r = _xkwds_get_(asorted_reverse, asorted=True, reverse=False) \ if asorted_reverse else (True, False) items = adict.items(*args) if args else adict.items() return sorted(items, reverse=r, key=_un if a else None) def limiterrors(raiser=None): '''Get/set the throwing of L{LimitError}s. @kwarg raiser: Choose C{True} to raise or C{False} to ignore L{LimitError} exceptions. Use C{None} to leave the setting unchanged. @return: Previous setting (C{bool}). ''' global _limiterrors t = _limiterrors if raiser in (True, False): _limiterrors = raiser return t def _or(*words): '''(INTERNAL) Join C{words} with C{", "} and C{" or "}. ''' return _and_or(_or_, *words) def _parseX(parser, *args, **name_values_Error): # name=value[, ..., Error=ParseError] '''(INTERNAL) Invoke a parser and handle exceptions. @arg parser: The parser (C{callable}). @arg args: Any B{C{parser}} arguments (any C{type}s). @kwarg name_values_Error: Any C{B{name}=value} pairs and optionally, C{B{Error}=ParseError} keyword argument to override the default. @return: Parser result. @raise ParseError: Or the specified C{B{Error}}. ''' try: return parser(*args) except Exception as x: E = _xkwds_pop(name_values_Error, Error=type(x) if isError(x) else ParseError) raise _XError(E, **_xkwds(name_values_Error, cause=x)) def rangerrors(raiser=None): '''Get/set the throwing of L{RangeError}s. @kwarg raiser: Choose C{True} to raise or C{False} to ignore L{RangeError} exceptions. Use C{None} to leave the setting unchanged. @return: Previous setting (C{bool}). ''' global _rangerrors t = _rangerrors if raiser in (True, False): _rangerrors = raiser return t def _SciPyIssue(x, *extras): # PYCHOK no cover if isinstance(x, (RuntimeWarning, UserWarning)): Error = SciPyWarning else: Error = SciPyError # PYCHOK not really t = _SPACE_(str(x).strip(), *extras) return Error(t, cause=x) def _xdatum(datum1, datum2, Error=None): '''(INTERNAL) Check for datum, ellipsoid or rhumb mis-match. ''' if Error: E1, E2 = datum1.ellipsoid, datum2.ellipsoid if E1 != E2: raise Error(E2.named2, txt=_incompatible(E1.named2)) elif datum1 != datum2: t = _SPACE_(_datum_, repr(datum1.name), _not_, repr(datum2.name)) raise _AssertionError(t) def _xellipsoidal(**name_value): '''(INTERNAL) Check an I{ellipsoidal} item. @return: The B{C{value}} if ellipsoidal. @raise TypeError: Not ellipsoidal B{C{value}}. ''' try: for n, v in name_value.items(): if v.isEllipsoidal: return v break else: n = v = MISSING except AttributeError: pass raise _TypeError(n, v, txt=_not_(_ellipsoidal_)) def _XError(Error, *args, **kwds): '''(INTERNAL) Format an C{Error} or C{_Error}. ''' try: # C{_Error} style return Error(*args, **kwds) except TypeError: # no keyword arguments pass e = _ValueError(*args, **kwds) E = Error(str(e)) if _exception_chaining: _error_cause(E, cause=e.__cause__) # PYCHOK OK return E _XErrors = _TypeError, _ValueError # map certain C{Exception} classes to the C{_Error} _X2Error = {AssertionError: _AssertionError, AttributeError: _AttributeError, ImportError: _ImportError, IndexError: _IndexError, KeyError: _KeyError, NameError: _NameError, NotImplementedError: _NotImplementedError, OverflowError: _OverflowError, TypeError: _TypeError, ValueError: _ValueError, ZeroDivisionError: _ZeroDivisionError} def _xError(x, *args, **kwds): '''(INTERNAL) Embellish a (caught) exception. @arg x: The exception (usually, C{_Error}). @arg args: Embelishments (C{any}). @kwarg kwds: Embelishments (C{any}). ''' return _XError(type(x), *args, **_xkwds(kwds, cause=x)) def _xError2(x): # in .fsums '''(INTERNAL) Map an exception to 2-tuple (C{_Error} class, error C{txt}). @arg x: The exception instance (usually, C{Exception}). ''' X = type(x) E = _X2Error.get(X, X) if E is X and not isError(x): E = _NotImplementedError t = repr(x) else: t = str(x) return E, t try: _ = {}.__or__ # {} | {} # Python 3.9+ def _xkwds(kwds, **dflts): '''(INTERNAL) Override C{dflts} with specified C{kwds}. ''' return (dflts | kwds) if kwds else dflts except AttributeError: from copy import copy as _copy def _xkwds(kwds, **dflts): # PYCHOK expected '''(INTERNAL) Override C{dflts} with specified C{kwds}. ''' d = dflts if kwds: d = _copy(d) d.update(kwds) return d def _xkwds_Error(where, kwds, name_txt, txt=_default_): # Helper for _xkwds_get, _xkwds_pop and _xkwds_popitem below f = _COMMASPACE_.join(_pairs(kwds) + _pairs(name_txt)) f = _MODS.streprs.Fmt.PAREN(where.__name__, f) t = _multiple_ if name_txt else _no_ t = _SPACE_(t, _EQUAL_(_name_, txt), _kwargs_) return _AssertionError(f, txt=t) def _xkwds_get(kwds, **name_default): '''(INTERNAL) Get a C{kwds} value by C{name}, or the C{default}. ''' if len(name_default) == 1: for n, d in name_default.items(): return kwds.get(n, d) raise _xkwds_Error(_xkwds_get, kwds, name_default) def _xkwds_get_(kwds, **names_defaults): '''(INTERNAL) Yield each C{kwds} value or its C{default} in I{case-insensitive, alphabetical} order. ''' for n, d in itemsorted(names_defaults): yield kwds.get(n, d) def _xkwds_not(*args, **kwds): '''(INTERNAL) Return C{kwds} with a value not in C{args}. ''' return dict((n, v) for n, v in kwds.items() if v not in args) def _xkwds_pop(kwds, **name_default): '''(INTERNAL) Pop a C{kwds} value by C{name}, or the C{default}. ''' if len(name_default) == 1: for n, d in name_default.items(): return kwds.pop(n, d) raise _xkwds_Error(_xkwds_pop, kwds, name_default) def _xkwds_pop_(kwds, **names_defaults): '''(INTERNAL) Pop and yield each C{kwds} value or its C{default} in I{case-insensitive, alphabetical} order. ''' for n, d in itemsorted(names_defaults): yield kwds.pop(n, d) def _xkwds_popitem(name_value): '''(INTERNAL) Return exactly one C{(name, value)} item. ''' if len(name_value) == 1: # XXX TypeError return name_value.popitem() # XXX AttributeError raise _xkwds_Error(_xkwds_popitem, (), name_value, txt=_value_) def _xzip(*args, **strict): # PYCHOK no cover '''(INTERNAL) Standard C{zip(..., strict=True)}. ''' s = _xkwds_get(strict, strict=True) if s: _zip = _MODS.basics._zip if _zip is zip: # < (3, 10) t = _MODS.streprs.unstr(_xzip.__name__, *args, strict=s) raise _NotImplementedError(t, txt=None) return _zip(*args) return zip(*args) # **) MIT License # # Copyright (C) 2016-2022 -- mrJean1 at Gmail -- All Rights Reserved. # # Permission is hereby granted, free of charge, to any person obtaining a # copy of this software and associated documentation files (the "Software"), # to deal in the Software without restriction, including without limitation # the rights to use, copy, modify, merge, publish, distribute, sublicense, # and/or sell copies of the Software, and to permit persons to whom the # Software is furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included # in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR # OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR # OTHER DEALINGS IN THE SOFTWARE.