Coverage for pygeodesy/streprs.py: 96%
272 statements
« prev ^ index » next coverage.py v7.2.2, created at 2024-05-02 14:35 -0400
« prev ^ index » next coverage.py v7.2.2, created at 2024-05-02 14:35 -0400
2# -*- coding: utf-8 -*-
4u'''Floating point and other formatting utilities.
5'''
7from pygeodesy.basics import isint, islistuple, isscalar, isstr, itemsorted, \
8 _zip, _0_0
9# from pygeodesy.constants import _0_0
10from pygeodesy.errors import _or, _AttributeError, _IsnotError, _TypeError, \
11 _ValueError, _xkwds_get, _xkwds_item2, _xkwds_pop2
12from pygeodesy.interns import NN, _0_, _0to9_, MISSING, _BAR_, _COMMASPACE_, \
13 _DOT_, _E_, _ELLIPSIS_, _EQUAL_, _H_, _LR_PAIRS, \
14 _N_, _name_, _not_, _not_scalar_, _PERCENT_, \
15 _SPACE_, _STAR_, _UNDER_, _dunder_nameof
16from pygeodesy.interns import _convergence_, _distant_, _e_, _eps_, _exceeds_, \
17 _EQUALSPACED_, _f_, _F_, _g_, _limit_, _no_, \
18 _tolerance_ # PYCHOK used!
19from pygeodesy.lazily import _ALL_LAZY, _ALL_MODS as _MODS
21from math import fabs, log10 as _log10
23__all__ = _ALL_LAZY.streprs
24__version__ = '24.04.28'
26_EN_PREC = 6 # max MGRS/OSGR precision, 1 micrometer
27_EN_WIDE = 5 # number of MGRS/OSGR units, log10(_100km)
28_OKd_ = '._-' # acceptable name characters
29_PAREN_g = '(%g)' # PYCHOK used!
30_RESIDUAL_ = 'RESIDUAL' # PYCHOK used!
31_threshold_ = 'threshold' # PYCHOK used!
34class _Fmt(str):
35 '''(INTERNAL) Callable formatting.
36 '''
37 name = NN
39 def __call__(self, *name_value_, **name_value):
40 '''Format a C{name=value} pair or C{name, value} pair or
41 just a single C{value}.
42 '''
43 for n, v in name_value.items():
44 break
45 else:
46 n, v = name_value_[:2] if len(name_value_) > 1 else (NN,
47 (name_value_[0] if name_value_ else MISSING))
48 t = str.__mod__(self, v)
49 return NN(n, t) if n else t
51# def __mod__(self, arg, **unused):
52# '''Regular C{%} operator.
53# '''
54# return str.__mod__(self, arg)
57class Fstr(str):
58 '''(INTERNAL) C{float} format.
59 '''
60 name = NN
62 def __call__(self, flt, prec=None, ints=False):
63 '''Format the B{C{flt}} like function L{fstr}.
64 '''
65 # see also function C{fstr} if isscalar case below
66 t = str.__mod__(_pct(self), flt) if prec is None else next(
67 _streprs(prec, (flt,), self, ints, True, None))
68 return t
70 def __mod__(self, arg, **unused):
71 '''Regular C{%} operator.
73 @arg arg: A C{scalar} value to be formatted (either
74 the C{scalar}, or a 1-tuple C{(scalar,)},
75 or 2-tuple C{(prec, scalar)}.
77 @raise TypeError: Non-scalar B{C{arg}} value.
79 @raise ValueError: Invalid B{C{arg}}.
80 '''
81 def _error(arg):
82 n = _DOT_(Fstr.__name__, self.name or self)
83 return _SPACE_(n, _PERCENT_, repr(arg))
85 prec = 6 # default std %f and %F
86 if islistuple(arg):
87 n = len(arg)
88 if n == 1:
89 arg = arg[0]
90 elif n == 2:
91 prec, arg = arg
92 else:
93 raise _ValueError(_error(arg))
95 if not isscalar(arg):
96 raise _TypeError(_error(arg))
97 return self(arg, prec=prec) # Fstr.__call__(self, arg, prec=prec)
100class _Sub(str):
101 '''(INTERNAL) Class list formatter.
102 '''
103 # see .ellipsoidalNvector.LatLon.deltaTo
104 def __call__(self, *Classes):
105 t = _or(*(C.__name__ for C in Classes))
106 return str.__mod__(self, t or MISSING)
109class Fmt(object):
110 '''Formatting options.
111 '''
112 ANGLE = _Fmt('<%s>')
113 COLON = _Fmt(':%s')
114# COLONSPACE = _Fmt(': %s') # == _COLONSPACE_(n, v)
115# COMMASPACE = _Fmt(', %s') # == _COMMASPACE_(n, v)
116 convergence = _Fmt(_convergence_(_PAREN_g))
117 CURLY = _Fmt('{%s}') # BRACES
118 distant = _Fmt(_distant_('(%.3g)'))
119 DOT = _Fmt('.%s') # == NN(_DOT_, n)
120 e = Fstr(_e_)
121 E = Fstr(_E_)
122 EQUAL = _Fmt(_EQUAL_(NN, '%s'))
123 EQUALg = _Fmt(_EQUAL_(NN, '%g'))
124 EQUALSPACED = _Fmt(_EQUALSPACED_(NN, '%s'))
125 exceeds_eps = _Fmt(_exceeds_(_eps_, _PAREN_g))
126 exceeds_limit = _Fmt(_exceeds_(_limit_, _PAREN_g))
127 exceeds_R = _Fmt(_exceeds_(_RESIDUAL_, _PAREN_g))
128 f = Fstr(_f_)
129 F = Fstr(_F_)
130 g = Fstr(_g_)
131 G = Fstr('G')
132 h = Fstr('%+.*f') # height, .streprs.hstr
133 limit = _Fmt(' %s limit') # .units
134 LOPEN = _Fmt('(%s]') # left-open range (L, R]
135 PAREN = _Fmt('(%s)')
136 PAREN_g = _Fmt(_PAREN_g)
137 PARENSPACED = _Fmt(' (%s)')
138 QUOTE2 = _Fmt('"%s"')
139 ROPEN = _Fmt('[%s)') # right-open range [L, R)
140# SPACE = _Fmt(' %s') # == _SPACE_(n, v)
141 SQUARE = _Fmt('[%s]') # BRACKETS
142 sub_class = _Sub('%s (sub-)class')
143 TAG = ANGLE
144 TAGEND = _Fmt('</%s>')
145 tolerance = _Fmt(_tolerance_(_PAREN_g))
146 zone = _Fmt('%02d') # .epsg, .mgrs, .utmupsBase
148 def __init__(self):
149 for n, a in self.__class__.__dict__.items():
150 if isinstance(a, (Fstr, _Fmt)):
151 setattr(a, _name_, n)
153 def __call__(self, obj, prec=9):
154 '''Return C{str(B{obj})} or C{repr(B{obj})}.
155 '''
156 return str(obj) if isint(obj) else next(
157 _streprs(prec, (obj,), Fmt.g, False, False, repr))
159 def INDEX(self, name=NN, i=None, **name_i):
160 '''Return C{"B{name}" if B{i} is None else "B{name}[B{i}]"}.
161 '''
162 if name_i:
163 name, i = _xkwds_item2(name_i)
164 return name if i is None else self.SQUARE(name, i)
166 def no_convergence(self, _d, *tol, **thresh):
167 '''Return C{"no convergence (B{_d})"}, C{"no convergence
168 (B{_d}), tolerance (B{tol})"} or C{"no convergence
169 (B{_d}), threshold (B{tol})"}.
170 '''
171 t = Fmt.convergence(fabs(_d))
172 if tol:
173 t = _COMMASPACE_(t, Fmt.tolerance(tol[0]))
174 if thresh and _xkwds_get(thresh, thresh=False):
175 t = t.replace(_tolerance_, _threshold_)
176 return _no_(t)
178Fmt = Fmt() # PYCHOK singleton
179Fmt.__name__ = Fmt.__class__.__name__
181_DOTSTAR_ = Fmt.DOT(_STAR_)
182# formats %G and %g drop all trailing zeros and the
183# decimal point, making the float appear as an int
184_Gg = (Fmt.G, Fmt.g)
185_FfEeGg = (Fmt.F, Fmt.f, Fmt.E, Fmt.e) + _Gg # float formats
186_Fspec_ = NN('[%[<flags>][<width>]', _DOTSTAR_, ']', _BAR_.join(_FfEeGg)) # in testStreprs
189def anstr(name, OKd=_OKd_, sub=_UNDER_):
190 '''Make a valid name of alphanumeric and OKd characters.
192 @arg name: The original name (C{str}).
193 @kwarg OKd: Other acceptable characters (C{str}).
194 @kwarg sub: Substitute for invalid charactes (C{str}).
196 @return: The modified name (C{str}).
198 @note: Leading and trailing whitespace characters are removed,
199 intermediate whitespace characters are coalesced and
200 substituted.
201 '''
202 s = n = str(name).strip()
203 for c in n:
204 if not (c.isalnum() or c in OKd or c in sub):
205 s = s.replace(c, _SPACE_)
206 return sub.join(s.strip().split())
209def attrs(inst, *names, **Nones_True__pairs_kwds): # prec=6, fmt=Fmt.F, ints=False, Nones=True, sep=_EQUAL_
210 '''Get instance attributes as I{name=value} strings, with C{float}s
211 formatted by function L{fstr}.
213 @arg inst: The instance (any C{type}).
214 @arg names: The attribute names, all other positional (C{str}).
215 @kwarg Nones_True__pairs_kwds: Keyword argument for function L{pairs}, except
216 C{B{Nones}=True} to in-/exclude missing or C{None}-valued attributes.
218 @return: A C{tuple(B{sep}.join(t) for t in zip(B{names}, reprs(values, ...)))}
219 of C{str}s.
220 '''
221 def _items(inst, names, Nones):
222 for n in names:
223 v = getattr(inst, n, None)
224 if Nones or v is not None:
225 yield n, v
227 def _Nones_kwds(Nones=True, **kwds):
228 return Nones, kwds
230 Nones, kwds = _Nones_kwds(**Nones_True__pairs_kwds)
231 return pairs(_items(inst, names, Nones), **kwds)
234def enstr2(easting, northing, prec, *extras, **wide_dot):
235 '''Return an MGRS/OSGR easting, northing string representations.
237 @arg easting: Easting from false easting (C{meter}).
238 @arg northing: Northing from from false northing (C{meter}).
239 @arg prec: Precision, the number of I{decimal} digits (C{int}) or if
240 negative, the number of I{units to drop}, like MGRS U{PRECISION
241 <https://GeographicLib.SourceForge.io/C++/doc/GeoConvert.1.html#PRECISION>}.
242 @arg extras: Optional leading items (C{str}s).
243 @kwarg wide_dot: Optional keword argument C{B{wide}=%d} for the number of I{unit digits}
244 (C{int}) and C{B{dot}=False} (C{bool}) to insert a decimal point.
246 @return: B{C{extras}} + 2-tuple C{(str(B{easting}), str(B{northing}))} or
247 + 2-tuple C{("", "")} for C{B{prec} <= -B{wide}}.
249 @raise ValueError: Invalid B{C{easting}}, B{C{northing}} or B{C{prec}}.
251 @note: The B{C{easting}} and B{C{northing}} values are I{truncated, not rounded}.
252 '''
253 t = extras
254 try: # like .dms.compassPoint
255 p = min(int(prec), _EN_PREC)
256 w = p + _xkwds_get(wide_dot, wide=_EN_WIDE)
257 if w > 0:
258 f = 10**p # truncate
259 d = (-p) if p > 0 and _xkwds_get(wide_dot, dot=False) else 0
260 t += (_0wdot(w, int(easting * f), d),
261 _0wdot(w, int(northing * f), d))
262 else: # prec <= -_EN_WIDE
263 t += (NN, NN)
264 except (TypeError, ValueError) as x:
265 raise _ValueError(easting=easting, northing=northing, prec=prec, cause=x)
266 return t
268if enstr2.__doc__: # PYCHOK expected
269 enstr2.__doc__ %= (_EN_WIDE,)
272def _enstr2m3(estr, nstr, wide=_EN_WIDE): # in .mgrs, .osgr
273 '''(INTERNAL) Convert east- and northing C{str}s to meter and resolution.
274 '''
275 def _s2m2(s, m): # e or n str to float meter
276 if _DOT_ in s:
277 m = 1 # meter
278 else:
279 s += _0_ * wide
280 s = _DOT_(s[:wide], s[wide:wide+_EN_PREC])
281 return float(s), m
283 e, m = _s2m2(estr, 0)
284 n, m = _s2m2(nstr, m)
285 if not m:
286 p = max(len(estr), len(nstr)) # 2 = Km, 5 = m, 7 = cm
287 m = 10**max(-_EN_PREC, wide - p) # resolution, meter
288 return e, n, m
291def fstr(floats, prec=6, fmt=Fmt.F, ints=False, sep=_COMMASPACE_, strepr=None):
292 '''Convert one or more floats to string, optionally stripped of trailing zero decimals.
294 @arg floats: Single or a list, sequence, tuple, etc. (C{scalar}s).
295 @kwarg prec: The C{float} precision, number of decimal digits (0..9).
296 Trailing zero decimals are stripped if B{C{prec}} is
297 positive, but kept for negative B{C{prec}} values. In
298 addition, trailing decimal zeros are stripped for U{alternate,
299 form '#'<https://docs.Python.org/3/library/stdtypes.html
300 #printf-style-string-formatting>}.
301 @kwarg fmt: Optional C{float} format (C{letter}).
302 @kwarg ints: Optionally, remove the decimal dot for C{int} values (C{bool}).
303 @kwarg sep: Separator joining the B{C{floats}} (C{str}).
304 @kwarg strepr: Optional callable to format non-C{floats} (typically
305 C{repr}, C{str}) or C{None} to raise a TypeError.
307 @return: The C{sep.join(strs(floats, ...)} joined (C{str}) or single
308 C{strs((floats,), ...)} (C{str}) if B{C{floats}} is C{scalar}.
309 '''
310 if isscalar(floats): # see Fstr.__call__ above
311 return next(_streprs(prec, (floats,), fmt, ints, True, strepr))
312 else:
313 return sep.join(_streprs(prec, floats, fmt, ints, True, strepr))
316def _fstrENH2(inst, prec, m, fmt=Fmt.F): # in .css, .lcc, .utmupsBase
317 # (INTERNAL) For C{Css.} and C{Lcc.} C{toRepr} and C{toStr} and C{UtmUpsBase._toStr}.
318 t = inst.easting, inst.northing
319 t = tuple(_streprs(prec, t, fmt, False, True, None))
320 T = _E_, _N_
321 if m is not None and fabs(inst.height): # fabs(self.height) > EPS
322 t += hstr(inst.height, prec=-2, m=m),
323 T += _H_,
324 return t, T
327def _fstrLL0(inst, prec, toRepr): # in .azimuthal, .css
328 # (INTERNAL) For C{_AlbersBase.}, C{_AzimuthalBase.} and C{CassiniSoldner.}
329 t = tuple(_streprs(prec, inst.latlon0, Fmt.F, False, True, None))
330 if toRepr:
331 n = inst.name
332 if n:
333 t += Fmt.EQUAL(_name_, repr(n)),
334 t = Fmt.PAREN(inst.classname, _COMMASPACE_.join(t))
335 return t
338def fstrzs(efstr, ap1z=False):
339 '''Strip trailing zero decimals from a C{float} string.
341 @arg efstr: Float with or without exponent (C{str}).
342 @kwarg ap1z: Append the decimal point and one zero decimal
343 if the B{C{efstr}} is all digits (C{bool}).
345 @return: Float (C{str}).
346 '''
347 s = efstr.find(_DOT_)
348 if s >= 0:
349 e = efstr.rfind(Fmt.e)
350 if e < 0:
351 e = efstr.rfind(Fmt.E)
352 if e < 0:
353 e = len(efstr)
354 s += 2 # keep 1st _DOT_ + _0_
355 if s < e and efstr[e-1] == _0_:
356 efstr = NN(efstr[:s], efstr[s:e].rstrip(_0_), efstr[e:])
358 elif ap1z:
359 # %.G and %.g formats may drop the decimal
360 # point and all trailing zeros, ...
361 if efstr.isdigit():
362 efstr += _DOT_ + _0_ # ... append or ...
363 else: # ... insert one dot and zero
364 e = efstr.rfind(Fmt.e)
365 if e < 0:
366 e = efstr.rfind(Fmt.E)
367 if e > 0:
368 efstr = NN(efstr[:e], _DOT_, _0_, efstr[e:])
370 return efstr
373def hstr(height, prec=2, fmt=Fmt.h, ints=False, m=NN):
374 '''Return a string for the height value.
376 @arg height: Height value (C{float}).
377 @kwarg prec: The C{float} precision, number of decimal digits (0..9).
378 Trailing zero decimals are stripped if B{C{prec}} is
379 positive, but kept for negative B{C{prec}} values.
380 @kwarg fmt: Optional C{float} format (C{letter}).
381 @kwarg ints: Optionally, remove the decimal dot for C{int} values (C{bool}).
382 @kwarg m: Optional unit of the height (C{str}).
383 '''
384 h = next(_streprs(prec, (height,), fmt, ints, True, None))
385 return NN(h, str(m)) if m else h
388def instr(inst, *args, **kwds):
389 '''Return the string representation of an instantiation.
391 @arg inst: The instance (any C{type}).
392 @arg args: Optional positional arguments.
393 @kwarg kwds: Optional keyword arguments.
395 @return: Representation (C{str}).
396 '''
397 return unstr(_MODS.named.classname(inst), *args, **kwds)
400def lrstrip(txt, lrpairs=_LR_PAIRS):
401 '''Left- I{and} right-strip parentheses, brackets, etc. from a string.
403 @arg txt: String to be stripped (C{str}).
404 @kwarg lrpairs: Parentheses, etc. to remove (C{dict} of one or several
405 C{(Left, Right)} pairs).
407 @return: Stripped B{C{txt}} (C{str}).
408 '''
409 _e, _s, _n = str.endswith, str.startswith, len
410 while _n(txt) > 2:
411 for L, R in lrpairs.items():
412 if _e(txt, R) and _s(txt, L):
413 txt = txt[_n(L):-_n(R)]
414 break # restart
415 else:
416 return txt
419def pairs(items, prec=6, fmt=Fmt.F, ints=False, sep=_EQUAL_):
420 '''Convert items to I{name=value} strings, with C{float}s handled like L{fstr}.
422 @arg items: Name-value pairs (C{dict} or 2-{tuple}s of any C{type}s).
423 @kwarg prec: The C{float} precision, number of decimal digits (0..9).
424 Trailing zero decimals are stripped if B{C{prec}} is
425 positive, but kept for negative B{C{prec}} values.
426 @kwarg fmt: Optional C{float} format (C{letter}).
427 @kwarg ints: Optionally, remove the decimal dot for C{int} values (C{bool}).
428 @kwarg sep: Separator joining I{names} and I{values} (C{str}).
430 @return: A C{tuple(B{sep}.join(t) for t in B{items}))} of C{str}s.
431 '''
432 try:
433 if isinstance(items, dict):
434 items = itemsorted(items)
435 elif not islistuple(items):
436 items = tuple(items)
437 # can't unzip empty items tuple, list, etc.
438 n, v = _zip(*items) if items else ((), ()) # strict=True
439 except (TypeError, ValueError):
440 raise _IsnotError(dict.__name__, '2-tuples', items=items)
441 v = _streprs(prec, v, fmt, ints, False, repr)
442 return tuple(sep.join(t) for t in _zip(map(str, n), v)) # strict=True
445def _pct(fmt):
446 '''(INTERNAL) Prefix C{%} if needed.
447 '''
448 return fmt if _PERCENT_ in fmt else NN(_PERCENT_, fmt)
451def reprs(objs, prec=6, fmt=Fmt.F, ints=False):
452 '''Convert objects to C{repr} strings, with C{float}s handled like L{fstr}.
454 @arg objs: List, sequence, tuple, etc. (any C{type}s).
455 @kwarg prec: The C{float} precision, number of decimal digits (0..9).
456 Trailing zero decimals are stripped if B{C{prec}} is
457 positive, but kept for negative B{C{prec}} values.
458 @kwarg fmt: Optional C{float} format (C{letter}).
459 @kwarg ints: Optionally, remove the decimal dot for C{int} values (C{bool}).
461 @return: A C{tuple(map(fstr|repr, objs))} of C{str}s.
462 '''
463 return tuple(_streprs(prec, objs, fmt, ints, False, repr)) if objs else ()
466def _resolution10(resolution, Error=ValueError): # in .mgrs, .osgr
467 '''(INTERNAL) Validate C{resolution} in C{meter}.
468 '''
469 try:
470 r = int(_log10(resolution))
471 if _EN_WIDE < r or r < -_EN_PREC:
472 raise ValueError
473 except (ValueError, TypeError):
474 raise Error(resolution=resolution)
475 return _MODS.units.Meter(resolution=10**r)
478def _streprs(prec, objs, fmt, ints, force, strepr):
479 '''(INTERNAL) Helper for C{fstr}, C{pairs}, C{reprs} and C{strs}
480 '''
481 # <https://docs.Python.org/3/library/stdtypes.html#printf-style-string-formatting>
482 if fmt in _FfEeGg:
483 fGg = fmt in _Gg
484 fmt = NN(_PERCENT_, _DOT_, abs(prec), fmt)
486 elif fmt.startswith(_PERCENT_):
487 fGg = False
488 try: # to make sure fmt is valid
489 f = fmt.replace(_DOTSTAR_, Fmt.DOT(abs(prec)))
490 _ = f % (_0_0,)
491 except (TypeError, ValueError):
492 raise _ValueError(fmt=fmt, txt=_not_(repr(_DOTSTAR_)))
493 fmt = f
495 else:
496 raise _ValueError(fmt=fmt, txt=_not_(repr(_Fspec_)))
498 for i, o in enumerate(objs):
499 if force or isinstance(o, float):
500 t = fmt % (float(o),)
501 if ints and t.rstrip(_0to9_ if isint(o, both=True) else
502 _0_).endswith(_DOT_):
503 t = t.split(_DOT_)[0]
504 elif prec > 1:
505 t = fstrzs(t, ap1z=fGg)
506 elif strepr:
507 t = strepr(o)
508 else:
509 t = Fmt.PARENSPACED(Fmt.SQUARE(objs=i), o)
510 raise TypeError(_SPACE_(t, _not_scalar_))
511 yield t
514def strs(objs, prec=6, fmt=Fmt.F, ints=False):
515 '''Convert objects to C{str} strings, with C{float}s handled like L{fstr}.
517 @arg objs: List, sequence, tuple, etc. (any C{type}s).
518 @kwarg prec: The C{float} precision, number of decimal digits (0..9).
519 Trailing zero decimals are stripped if B{C{prec}} is
520 positive, but kept for negative B{C{prec}} values.
521 @kwarg fmt: Optional C{float} format (C{letter}).
522 @kwarg ints: Optionally, remove the decimal dot for C{int} values (C{bool}).
524 @return: A C{tuple(map(fstr|str, objs))} of C{str}s.
525 '''
526 return tuple(_streprs(prec, objs, fmt, ints, False, str)) if objs else ()
529def unstr(where, *args, **kwds):
530 '''Return the string representation of an invokation.
532 @arg where: Class, function, method (C{type}) or name (C{str}).
533 @arg args: Optional positional arguments.
534 @kwarg kwds: Optional keyword arguments, except C{B{_fmt}=Fmt.g}
535 and C{B{_ELLIPSIS}=False}.
537 @return: Representation (C{str}).
538 '''
539 e, kwds = _xkwds_pop2(kwds, _ELLIPSIS=False)
540 g, kwds = _xkwds_pop2(kwds, _fmt=Fmt.g)
541 t = reprs(args, fmt=g) if args else ()
542 if e:
543 t += _ELLIPSIS_,
544 if kwds:
545 t += pairs(itemsorted(kwds), fmt=g)
546 n = where if isstr(where) else _dunder_nameof(where) # _NN_
547 return Fmt.PAREN(n, _COMMASPACE_.join(t))
550def _0wd(*w_i): # in .osgr, .wgrs
551 '''(INTERNAL) Int formatter'.
552 '''
553 return '%0*d' % w_i
556def _0wdot(w, f, dot=0):
557 '''(INTERNAL) Int and Float formatter'.
558 '''
559 s = _0wd(w, int(f))
560 if dot:
561 s = _DOT_(s[:dot], s[dot:])
562 return s
565def _0wpF(*w_p_f): # in .dms, .osgr
566 '''(INTERNAL) Float deg, min, sec formatter'.
567 '''
568 return '%0*.*f' % w_p_f # XXX was F
571def _xattrs(insto, other, *attrs): # see .errors._xattr
572 '''(INTERNAL) Copy attribute values from B{C{other}} to B{C{insto}}.
574 @arg insto: Object to copy attribute values to (any C{type}).
575 @arg other: Object to copy attribute values from (any C{type}).
576 @arg attrs: One or more attribute names (C{str}s).
578 @return: Object B{C{insto}}, updated.
580 @raise AttributeError: An B{C{attrs}} doesn't exist
581 or is not settable.
582 '''
583 def _getattr(o, a):
584 if hasattr(o, a):
585 return getattr(o, a)
586 try:
587 n = o._DOT_(a)
588 except AttributeError:
589 n = Fmt.DOT(a)
590 raise _AttributeError(o, name=n)
592 for a in attrs:
593 s = _getattr(other, a)
594 g = _getattr(insto, a)
595 if (g is None and s is not None) or g != s:
596 setattr(insto, a, s) # not settable?
597 return insto
600def _xzipairs(names, values, sep=_COMMASPACE_, fmt=NN, pair_fmt=Fmt.COLON):
601 '''(INTERNAL) Zip C{names} and C{values} into a C{str}, joined and bracketed.
602 '''
603 try:
604 t = sep.join(pair_fmt(*t) for t in _zip(names, values)) # strict=True
605 except Exception as x:
606 raise _ValueError(names=names, values=values, cause=x)
607 return (fmt % (t,)) if fmt else t # enc
609# **) MIT License
610#
611# Copyright (C) 2016-2024 -- mrJean1 at Gmail -- All Rights Reserved.
612#
613# Permission is hereby granted, free of charge, to any person obtaining a
614# copy of this software and associated documentation files (the "Software"),
615# to deal in the Software without restriction, including without limitation
616# the rights to use, copy, modify, merge, publish, distribute, sublicense,
617# and/or sell copies of the Software, and to permit persons to whom the
618# Software is furnished to do so, subject to the following conditions:
619#
620# The above copyright notice and this permission notice shall be included
621# in all copies or substantial portions of the Software.
622#
623# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
624# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
625# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
626# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
627# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
628# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
629# OTHER DEALINGS IN THE SOFTWARE.