# Coverage for pygeodesy/errors.py : 98%

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By default, I{exception chaining} is turned off. Set environment variable C{PYGEODESY_EXCEPTION_CHAINING} to 'std' or any other non-empty string to enable I{exception chaining}. ''' from pygeodesy.lazily import _ALL_LAZY, _environ # all public contants, classes and functions __all__ = _ALL_LAZY.errors # _ALL_DOCS('_InvalidError', '_IsnotError') __version__ = '20.07.01' _Degrees = 'degrees' # PYCHOK exported to .dms, .frechet, .hausdorff, .units _Invalid = 'invalid' _limiterrors = True # imported by .formy _Meter = 'meter' # PYCHOK exported to .frechet, .hausdorff, .heights _Not_convex = 'not convex' # PYCHOK exported to .clipy, .sphericalTrigonometry _Radians = 'radians' # PYCHOK exported to .dms, .frechet, .hausdorff, .units _Radians2 = 'radians**2' # PYCHOK exported to .frechet, .hausdorff _rangerrors = True # imported by .dms _Valid = 'valid' # PYCHOK exported to .points try: _exception_chaining = None # not available _ = Exception().__cause__ # Python 3+ exception chaining if _environ.get('PYGEODESY_EXCEPTION_CHAINING', None): # == 'std' _exception_chaining = True # turned on, std raise AttributeError # allow exception chaining _exception_chaining = False # turned off def _cause_(inst, other=None): '''(INTERNAL) Set or avoid Python 3+ exception chaining. Setting C{inst.__cause__ = None} is equivalent to syntax C{raise Error(...) from None} to avoids exception chaining. @arg inst: An error instance (C{Exception}). @kwarg other: The previous error instance (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__ = other # no exception chaining return inst except AttributeError: # Python 2+ def _cause_(inst, **unused): # PYCHOK expected return inst # no-op class _AssertionError(AssertionError): '''(INTERNAL) Format an C{AssertionError} without exception chaining. ''' def __init__(self, *name_value, **txt_name_values): # txt=_Invalid _error_init(AssertionError, self, name_value, **txt_name_values) class _AttributeError(AttributeError): '''(INTERNAL) Format an C{AttributeError} without exception chaining. ''' def __init__(self, *name_value, **txt_name_values): # txt=_Invalid _error_init(AttributeError, self, name_value, **txt_name_values) class _IndexError(IndexError): '''(INTERNAL) Format an C{IndexError} without exception chaining. ''' def __init__(self, *name_value, **txt_name_values): # txt=_Invalid _error_init(IndexError, self, name_value, **txt_name_values) class _NameError(NameError): '''(INTERNAL) Format a C{NameError} without exception chaining. ''' def __init__(self, *name_value, **txt_name_values): # txt=_Invalid _error_init(NameError, self, name_value, **txt_name_values) class _OverflowError(OverflowError): '''(INTERNAL) Format an C{OverflowError} without exception chaining. ''' def __init__(self, *name_value, **txt_name_values): # txt=_Invalid _error_init(OverflowError, self, name_value, **txt_name_values) class _TypeError(TypeError): '''(INTERNAL) Format a C{TypeError} without exception chaining. ''' def __init__(self, *name_value, **txt_name_values): _error_init(TypeError, self, name_value, fmt_name_value='type(%s) (%r)', **txt_name_values) class _TypesError(_TypeError): '''(INTERNAL) Format a C{TypeError} without exception chaining. ''' def __init__(self, name, value, *Types): t = 'not ' + _an(_or(*(t.__name__ for t in Types))) _TypeError.__init__(self, name, value, txt=t) class _ValueError(ValueError): '''(INTERNAL) Format a C{ValueError} without exception chaining. ''' def __init__(self, *name_value, **txt_name_values): # name, value, txt=_Invalid _error_init(ValueError, self, name_value, **txt_name_values) 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): '''Error raised for path or circle intersection issues. ''' def __init__(self, txt=_Invalid, **kwds): '''New L{IntersectionError}. ''' _ValueError.__init__(self, txt=txt, **kwds) class LenError(_ValueError): '''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 = _xkwds_pop(lens_txt, txt=_Invalid) ns, vs = zip(*sorted(lens_txt.items())) ns = ', '.join(ns) vs = ' vs '.join(map(str, vs)) t = '%s(%s) len %s' % (where.__name__, ns, vs) _ValueError.__init__(self, t, txt=x) class LimitError(_ValueError): '''Error raised for lat- or longitudinal deltas exceeding the B{C{limit}} in functions L{equirectangular} and L{equirectangular_} and C{nearestOn*} and C{simplify*} functions or methods. ''' pass class ParseError(_ValueError): '''Error parsing degrees, radians or several other formats. ''' pass class PointsError(_ValueError): '''Error for an insufficient number of points. ''' pass class RangeError(_ValueError): '''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{clipDegrees}, L{clipRadians}, L{parse3llh}, L{parseDMS}, L{parseDMS2} or L{parseRad}. @see: Function L{rangerrors}. ''' pass class SciPyError(PointsError): '''Error raised for C{SciPy} errors. ''' 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 environment variable U{PYTHONWARNINGS<https://docs.Python.org/3/using/cmdline.html #envvar-PYTHONWARNINGS>} or with C{python} command line option U{-W<https://docs.Python.org/3/using/cmdline.html#cmdoption-w>} as C{error}. ''' pass def _an(noun): '''(INTERNAL) Prepend an article to a noun based on the pronounciation of the first letter. ''' return ('an ' if noun[:1].lower() in 'aeinoux' else 'a ') + noun 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.crosserrors}. ''' from pygeodesy.vector3d import Vector3d t = Vector3d._crosserrors # XXX class attr! if raiser in (True, False): Vector3d._crosserrors = raiser return t def _ename_(inst): '''(INTERNAL) Remove leading underscore from instance' class name. ''' n = inst.__class__.__name__ if n.startswith('_'): inst.__class__.__name__ = n.lstrip('_') return inst def _error_init(Error, inst, name_value, fmt_name_value='%s (%r)', txt=_Invalid, **name_values): # 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 initialized (C{_Exception}). @arg name_value: 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 used as C{name=value} keyword arguments. @kwarg name_value_fmt: Format for (name, value) (C{str}). @kwarg txt: Optional explanation of the error (C{str}). @kwarg name_values: One or more B{C{name=value}} pairs overriding any B{C{name_value}} positional arguments. ''' if name_values: t = _or(*(fmt_name_value % t for t in name_values.items())) # XXX sorted elif len(name_value) > 1: t = _or(*(fmt_name_value % t for t in zip(name_value[0::2], name_value[1::2]))) elif name_value: t = str(name_value[0]) else: t = '%s %r' % (_Missing, 'name[, value]',) if txt is None: x = '' else: x = str(txt) or _Invalid c = ',' if ':' in t else ':' t = ''.join((t, c, ' ', x)) Error.__init__(inst, t) # inst.__x_txt__ = x # hold explanation _cause_(inst) # no Python 3+ exception chaining _ename_(inst) def exception_chaining(error=None): '''Get the previous exception or exception chaining setting. @kwarg error: An error instance (C{Exception}) or C{None}. @return: If B{C{error=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 the previous, chained error or C{None} otherwise. ''' return _exception_chaining if error is None else \ getattr(error, '__cause__', None) def _incompatible(this): '''(INTERNAL) Format an incompatible text. ''' return ' '.join(('incompatible', 'with', str(this))) def _InvalidError(Error=_ValueError, **txt_name_values): # txt='', 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 B{C{name=value}} pairs and optionally, a B{C{txt=...}} keyword argument to override the default B{C{txt=_Invalid}} @return: An B{C{Error}} instance. ''' try: e = Error(**txt_name_values) except TypeError: # std *Error takes no keyword arguments e = _ValueError(**txt_name_values) e = Error(str(e)) _cause_(e) _ename_(e) return e def _IsnotError(*nouns, **name_value_Error): # name=value [, Error=TypeeError] '''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: One B{C{name=value}} pair and optionally, an B{C{Error=...}} keyword argument to override the default B{C{Error=TypeError}}. @return: A C{TypeError} or an B{C{Error}} instance. ''' Error = _xkwds_pop(name_value_Error, Error=TypeError) for n, v in name_value_Error.items(): break else: n, v = repr('name=value'), _Missing t = _or(*nouns) or 'specified' if len(nouns) > 1: t = _an(t) e = Error('%s (%r) not %s' % (n, v, t)) _cause_(e) _ename_(e) return e def _item_(*name_key_arg, **name_key_kwd): '''(INTERNAL) Return an indexed or keyed name. ''' for n_k in name_key_kwd.items(): break else: n_k = name_key_arg return '%s[%r]' % n_k 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 class _Missing(object): '''(INTERNAL) Singleton. ''' def toRepr(self, **unused): return 'missing' # self.__class__.__name__.strip('_'),lower() __repr__ = toRepr __str__ = toRepr toStr = toRepr _Missing = _Missing() # PYCHOK singleton def _or(*words): '''(INTERNAL) Join C{words} with C{', '} and C{' or '}. ''' t, w = '', list(words) if w: t = w.pop() if w: w = ', '.join(w) t = ' or '.join((w, t)) return t 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 parser positional arguments (any C{type}s). @kwarg name_values_Error: One or more B{C{name=value}} pairs and optionally, an B{C{Error=...}} keyword argument to override the default B{C{Error=ParseError}}. @return: Parser result. @raise ParseError: Or the specified B{C{Error=...}}. @raise RangeError: If that error occurred. ''' try: return parser(*args) except RangeError as x: t = str(x) E = type(x) _ = _xkwds_pop(name_values_Error, Error=None) except (AttributeError, IndexError, TypeError, ValueError) as x: t = str(x) E = _xkwds_pop(name_values_Error, Error=ParseError) raise _InvalidError(Error=E, txt=t, **name_values_Error) 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 t = map(str, extras) if extras else [] t = ' '.join(str(x).strip().split() + t) if isinstance(x, (RuntimeWarning, UserWarning)): return _cause_(SciPyWarning(t), other=x) else: return _cause_(SciPyError(t), other=x) # PYCHOK not really def _xkwds_Error(_xkwds_func, kwds, name_default): from pygeodesy.streprs import unstr t = unstr(_xkwds_func.__name__, kwds, **name_default) n = 'multiple' if name_default else 'no' return _AssertionError(t, txt=n + ' name=default kwargs') def _xkwds_get(kwds, **name_default): '''(INTERNAL) Get a C{kwds} value by C{name}, or the C{default}. ''' if len(name_default) != 1: raise _xkwds_Error(_xkwds_get, kwds, name_default) for n, d in name_default.items(): return kwds.get(n, d) def _xkwds_pop(kwds, **name_default): '''(INTERNAL) Pop a C{kwds} value by C{name}, or the C{default}. ''' if len(name_default) != 1: raise _xkwds_Error(_xkwds_pop, kwds, name_default) for n, d in name_default.items(): return kwds.pop(n, d) # **) MIT License # # Copyright (C) 2016-2020 -- 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.