/usr/lib/python2.7/dist-packages/quantities/unitquantity.py is in python-quantities 0.10.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 | """
"""
from __future__ import absolute_import
import sys
import weakref
import numpy
from .dimensionality import Dimensionality
from . import markup
from .quantity import Quantity, get_conversion_factor
from .registry import unit_registry
from .decorators import memoize, with_doc
__all__ = [
'CompoundUnit', 'Dimensionless', 'UnitConstant', 'UnitCurrency',
'UnitCurrent', 'UnitInformation', 'UnitLength', 'UnitLuminousIntensity',
'UnitMass', 'UnitMass', 'UnitQuantity', 'UnitSubstance', 'UnitTemperature',
'UnitTime', 'set_default_units'
]
class UnitQuantity(Quantity):
_primary_order = 90
_secondary_order = 0
_reference_quantity = None
__array_priority__ = 20
def __new__(
cls, name, definition=None, symbol=None, u_symbol=None,
aliases=[], doc=None
):
try:
assert isinstance(name, str)
except AssertionError:
raise TypeError('name must be a string, got %s (not unicode)'%name)
try:
assert symbol is None or isinstance(symbol, str)
except AssertionError:
raise TypeError(
'symbol must be a string, '
'got %s (u_symbol can be unicode)'%symbol
)
ret = numpy.array(1, dtype='d').view(cls)
ret.flags.writeable = False
ret._name = name
ret._symbol = symbol
ret._u_symbol = u_symbol
if doc is not None:
ret.__doc__ = doc
if definition is not None:
if not isinstance(definition, Quantity):
definition *= dimensionless
ret._definition = definition
ret._conv_ref = definition._reference
else:
ret._definition = None
ret._conv_ref = None
ret._aliases = aliases
ret._format_order = (ret._primary_order, ret._secondary_order)
ret.__class__._secondary_order += 1
return ret
def __init__(
self, name, definition=None, symbol=None, u_symbol=None,
aliases=[], doc=None
):
unit_registry[name] = self
if symbol:
unit_registry[symbol] = self
for alias in aliases:
unit_registry[alias] = self
def __array_finalize__(self, obj):
pass
def __hash__(self):
return hash((type(self), self._name))
@property
def _reference(self):
if self._conv_ref is None:
return self
else:
return self._conv_ref
@property
def _dimensionality(self):
return Dimensionality({self:1})
@property
def format_order(self):
return self._format_order
@property
def name(self):
return self._name
@property
def definition(self):
if self._definition is None:
return self
else:
return self._definition
@property
def simplified(self):
return self._reference.simplified
@property
def symbol(self):
if self._symbol:
return self._symbol
else:
return self.name
@property
def u_symbol(self):
if self._u_symbol:
return self._u_symbol
else:
return self.symbol
@property
def units(self):
return self
@units.setter
def units(self, units):
raise AttributeError('can not modify protected units')
def __repr__(self):
ref = self._definition
if ref:
ref = ', %s * %s'%(str(ref.magnitude), ref.dimensionality.string)
else:
ref = ''
symbol = self._symbol
symbol = ', %s'%(repr(symbol)) if symbol else ''
if markup.config.use_unicode:
u_symbol = self._u_symbol
u_symbol = ', %s'%(repr(u_symbol)) if u_symbol else ''
else:
u_symbol = ''
return '%s(%s%s%s%s)'%(
self.__class__.__name__, repr(self.name), ref, symbol, u_symbol
)
@with_doc(Quantity.__str__, use_header=False)
def __str__(self):
if self.u_symbol != self.name:
if markup.config.use_unicode:
s = '1 %s (%s)'%(self.u_symbol, self.name)
else:
s = '1 %s (%s)'%(self.symbol, self.name)
else:
s = '1 %s'%self.name
return s
@with_doc(Quantity.__add__, use_header=False)
def __add__(self, other):
return self.view(Quantity).__add__(other)
@with_doc(Quantity.__radd__, use_header=False)
def __radd__(self, other):
try:
return self.rescale(other.units).__radd__(other)
except AttributeError:
return self.view(Quantity).__radd__(other)
@with_doc(Quantity.__sub__, use_header=False)
def __sub__(self, other):
return self.view(Quantity).__sub__(other)
@with_doc(Quantity.__rsub__, use_header=False)
def __rsub__(self, other):
try:
return self.rescale(other.units).__rsub__(other)
except AttributeError:
return self.view(Quantity).__rsub__(other)
@with_doc(Quantity.__mod__, use_header=False)
def __mod__(self, other):
return self.view(Quantity).__mod__(other)
@with_doc(Quantity.__rsub__, use_header=False)
def __rmod__(self, other):
try:
return self.rescale(other.units).__rmod__(other)
except AttributeError:
return self.view(Quantity).__rmod__(other)
@with_doc(Quantity.__mul__, use_header=False)
def __mul__(self, other):
return self.view(Quantity).__mul__(other)
@with_doc(Quantity.__rmul__, use_header=False)
def __rmul__(self, other):
return self.view(Quantity).__rmul__(other)
@with_doc(Quantity.__truediv__, use_header=False)
def __truediv__(self, other):
return self.view(Quantity).__truediv__(other)
@with_doc(Quantity.__rtruediv__, use_header=False)
def __rtruediv__(self, other):
return self.view(Quantity).__rtruediv__(other)
if sys.version_info[0] < 3:
@with_doc(Quantity.__div__, use_header=False)
def __div__(self, other):
return self.view(Quantity).__div__(other)
@with_doc(Quantity.__rdiv__, use_header=False)
def __rdiv__(self, other):
return self.view(Quantity).__rdiv__(other)
@with_doc(Quantity.__pow__, use_header=False)
def __pow__(self, other):
return self.view(Quantity).__pow__(other)
@with_doc(Quantity.__rpow__, use_header=False)
def __rpow__(self, other):
return self.view(Quantity).__rpow__(other)
@with_doc(Quantity.__iadd__, use_header=False)
def __iadd__(self, other):
raise TypeError('can not modify protected units')
@with_doc(Quantity.__isub__, use_header=False)
def __isub__(self, other):
raise TypeError('can not modify protected units')
@with_doc(Quantity.__imul__, use_header=False)
def __imul__(self, other):
raise TypeError('can not modify protected units')
@with_doc(Quantity.__itruediv__, use_header=False)
def __itruediv__(self, other):
raise TypeError('can not modify protected units')
if sys.version_info[0] < 3:
@with_doc(Quantity.__idiv__, use_header=False)
def __idiv__(self, other):
raise TypeError('can not modify protected units')
@with_doc(Quantity.__ipow__, use_header=False)
def __ipow__(self, other):
raise TypeError('can not modify protected units')
def __getstate__(self):
"""
Return the internal state of the quantity, for pickling
purposes.
"""
state = (1, self._format_order)
return state
def __setstate__(self, state):
ver, fo = state
self._format_order = fo
def __reduce__(self):
"""
Return a tuple for pickling a UnitQuantity.
"""
return (
type(self),
(
self._name,
self._definition,
self._symbol,
self._u_symbol,
self._aliases,
self.__doc__
),
self.__getstate__()
)
def copy(self):
return (
type(self)(
self._name,
self._definition,
self._symbol,
self._u_symbol,
self._aliases,
self.__doc__
)
)
unit_registry['UnitQuantity'] = UnitQuantity
class IrreducibleUnit(UnitQuantity):
_default_unit = None
def __init__(
self, name, definition=None, symbol=None, u_symbol=None,
aliases=[], doc=None
):
super(IrreducibleUnit, self).__init__(
name, definition, symbol, u_symbol, aliases, doc
)
cls = type(self)
if cls._default_unit is None:
cls._default_unit = self
@property
def simplified(self):
return self.view(Quantity).rescale(self.get_default_unit())
@classmethod
def get_default_unit(cls):
return cls._default_unit
@classmethod
def set_default_unit(cls, unit):
if unit is None:
return
if isinstance(unit, str):
unit = unit_registry[unit]
try:
# check that conversions are possible:
get_conversion_factor(cls._default_unit, unit)
except ValueError:
raise TypeError('default unit must be of same type')
cls._default_unit = unit
class UnitMass(IrreducibleUnit):
_primary_order = 1
class UnitLength(IrreducibleUnit):
_primary_order = 2
class UnitTime(IrreducibleUnit):
_primary_order = 3
class UnitCurrent(IrreducibleUnit):
_primary_order = 4
class UnitLuminousIntensity(IrreducibleUnit):
_primary_order = 5
class UnitSubstance(IrreducibleUnit):
_primary_order = 6
class UnitTemperature(IrreducibleUnit):
_primary_order = 7
class UnitInformation(IrreducibleUnit):
_primary_order = 8
class UnitCurrency(IrreducibleUnit):
_primary_order = 9
class CompoundUnit(UnitQuantity):
_primary_order = 99
def __new__(cls, name):
return UnitQuantity.__new__(cls, name, unit_registry[name])
def __init__(self, name):
# do not register
return
@with_doc(UnitQuantity.__add__, use_header=False)
def __repr__(self):
return '1 %s'%self.name
@property
def name(self):
if markup.config.use_unicode:
return '(%s)'%(markup.superscript(self._name))
else:
return '(%s)'%self._name
def __reduce__(self):
"""
Return a tuple for pickling a UnitQuantity.
"""
return (
type(self),
(self._name, ),
self.__getstate__()
)
def copy(self):
return type(self)(self._name)
unit_registry['CompoundUnit'] = CompoundUnit
class Dimensionless(UnitQuantity):
_primary_order = 100
def __init__(self, name, definition=None):
self._name = name
if definition is None:
definition = self
self._definition = definition
self._format_order = (self._primary_order, self._secondary_order)
self.__class__._secondary_order += 1
unit_registry[name] = self
def __reduce__(self):
"""
Return a tuple for pickling a UnitQuantity.
"""
return (
type(self),
(
self._name,
),
self.__getstate__()
)
@property
def _dimensionality(self):
return Dimensionality()
dimensionless = Dimensionless('dimensionless')
class UnitConstant(UnitQuantity):
_primary_order = 0
def __init__(
self, name, definition=None, symbol=None, u_symbol=None,
aliases=[], doc=None
):
# we dont want to register constants in the unit registry
return
def set_default_units(
system=None, currency=None, current=None, information=None, length=None,
luminous_intensity=None, mass=None, substance=None, temperature=None,
time=None
):
"""
Set the default units in which simplified quantities will be
expressed.
system sets the unit system, and can be "SI" or "cgs". All other
keyword arguments will accept either a string or a unit quantity.
An error will be raised if it is not possible to convert between
old and new defaults, so it is not possible to set "kg" as the
default unit for time.
If both system and individual defaults are given, the system
defaults will be applied first, followed by the individual ones.
"""
if system is not None:
system = system.lower()
try:
assert system in ('si', 'cgs')
except AssertionError:
raise ValueError('system must be "SI" or "cgs", got "%s"' % system)
if system == 'si':
UnitCurrent.set_default_unit('A')
UnitLength.set_default_unit('m')
UnitMass.set_default_unit('kg')
elif system == 'cgs':
UnitLength.set_default_unit('cm')
UnitMass.set_default_unit('g')
UnitLuminousIntensity.set_default_unit('cd')
UnitSubstance.set_default_unit('mol')
UnitTemperature.set_default_unit('degK')
UnitTime.set_default_unit('s')
UnitCurrency.set_default_unit(currency)
UnitCurrent.set_default_unit(current)
UnitInformation.set_default_unit(information)
UnitLength.set_default_unit(length)
UnitLuminousIntensity.set_default_unit(luminous_intensity)
UnitMass.set_default_unit(mass)
UnitSubstance.set_default_unit(substance)
UnitTemperature.set_default_unit(temperature)
UnitTime.set_default_unit(time)
|