Python math.isinf方法代码示例

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def _compute_delta(self, log_moments, eps):
    """Compute delta for given log_moments and eps.

    Args:
      log_moments: the log moments of privacy loss, in the form of pairs
        of (moment_order, log_moment)
      eps: the target epsilon.
    Returns:
      delta
    """
    min_delta = 1.0
    for moment_order, log_moment in log_moments:
      if math.isinf(log_moment) or math.isnan(log_moment):
        sys.stderr.write("The %d-th order is inf or Nan\n" % moment_order)
        continue
      if log_moment < moment_order * eps:
        min_delta = min(min_delta,
                        math.exp(log_moment - moment_order * eps))
    return min_delta 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def _compute_delta(log_moments, eps):
  """Compute delta for given log_moments and eps.

  Args:
    log_moments: the log moments of privacy loss, in the form of pairs
      of (moment_order, log_moment)
    eps: the target epsilon.
  Returns:
    delta
  """
  min_delta = 1.0
  for moment_order, log_moment in log_moments:
    if moment_order == 0:
      continue
    if math.isinf(log_moment) or math.isnan(log_moment):
      sys.stderr.write("The %d-th order is inf or Nan\n" % moment_order)
      continue
    if log_moment < moment_order * eps:
      min_delta = min(min_delta,
                      math.exp(log_moment - moment_order * eps))
  return min_delta 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def GenerateBinomialTable(m):
  """Generate binomial table.

  Args:
    m: the size of the table.
  Returns:
    A two dimensional array T where T[i][j] = (i choose j),
    for 0<= i, j <=m.
  """

  table = numpy.zeros((m + 1, m + 1), dtype=numpy.float64)
  for i in range(m + 1):
    table[i, 0] = 1
  for i in range(1, m + 1):
    for j in range(1, m + 1):
      v = table[i - 1, j] + table[i - 1, j -1]
      assert not math.isnan(v) and not math.isinf(v)
      table[i, j] = v
  return tf.convert_to_tensor(table) 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def from_float(cls, f):
        """Converts a finite float to a rational number, exactly.

        Beware that Fraction.from_float(0.3) != Fraction(3, 10).

        """
        if isinstance(f, numbers.Integral):
            return cls(f)
        elif not isinstance(f, float):
            raise TypeError("%s.from_float() only takes floats, not %r (%s)" %
                            (cls.__name__, f, type(f).__name__))
        if math.isnan(f):
            raise ValueError("Cannot convert %r to %s." % (f, cls.__name__))
        if math.isinf(f):
            raise OverflowError("Cannot convert %r to %s." % (f, cls.__name__))
        return cls(*f.as_integer_ratio()) 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def __eq__(a, b):
        """a == b"""
        if isinstance(b, numbers.Rational):
            return (a._numerator == b.numerator and
                    a._denominator == b.denominator)
        if isinstance(b, numbers.Complex) and b.imag == 0:
            b = b.real
        if isinstance(b, float):
            if math.isnan(b) or math.isinf(b):
                # comparisons with an infinity or nan should behave in
                # the same way for any finite a, so treat a as zero.
                return 0.0 == b
            else:
                return a == a.from_float(b)
        else:
            # Since a doesn't know how to compare with b, let's give b
            # a chance to compare itself with a.
            return NotImplemented 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def _richcmp(self, other, op):
        """Helper for comparison operators, for internal use only.

        Implement comparison between a Rational instance `self`, and
        either another Rational instance or a float `other`.  If
        `other` is not a Rational instance or a float, return
        NotImplemented. `op` should be one of the six standard
        comparison operators.

        """
        # convert other to a Rational instance where reasonable.
        if isinstance(other, numbers.Rational):
            return op(self._numerator * other.denominator,
                      self._denominator * other.numerator)
        if isinstance(other, float):
            if math.isnan(other) or math.isinf(other):
                return op(0.0, other)
            else:
                return op(self, self.from_float(other))
        else:
            return NotImplemented 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def draw_setpoint(self, *args):
        # draw a setpoint
        if self.setpoint_canvas:
            self.canvas.after.remove(self.setpoint_canvas)
            self.setpoint_canvas = None

        if math.isnan(self.setpoint_value) or math.isinf(self.setpoint_value):
            return

        v = self.value_to_angle(self.setpoint_value)
        length = self.dial_diameter / 2.0 - self.tic_length if not self.setpoint_length else self.setpoint_length
        self.setpoint_canvas = InstructionGroup()

        self.setpoint_canvas.add(PushMatrix())
        self.setpoint_canvas.add(Color(*self.setpoint_color))
        self.setpoint_canvas.add(Rotate(angle=v, axis=(0, 0, -1), origin=self.dial_center))
        self.setpoint_canvas.add(Translate(self.dial_center[0], self.dial_center[1]))
        self.setpoint_canvas.add(Line(points=[0, 0, 0, length], width=self.setpoint_thickness, cap='none'))
        # self.setpoint_canvas.add(SmoothLine(points=[0, 0, 0, length], width=self.setpoint_thickness))
        self.setpoint_canvas.add(PopMatrix())

        self.canvas.after.add(self.setpoint_canvas) 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def __call__(self, state, scope, pos, paramTypes, x, *args):
        if len(args) == 3:
            numbins, low, high = args
            if low >= high or math.isnan(low) or math.isnan(high):
                raise PFARuntimeException("bad histogram range", self.errcodeBase + 0, self.name, pos)
            if numbins < 1:
                raise PFARuntimeException("bad histogram scale", self.errcodeBase + 1, self.name, pos)
            if math.isnan(x) or x < low or x >= high:
                raise PFARuntimeException("x out of range", self.errcodeBase + 2, self.name, pos)

            out = int(math.floor(numbins * div((x - low), (high - low))))

            if out < 0 or out >= numbins:
                raise PFARuntimeException("x out of range", self.errcodeBase + 2, self.name, pos)
            return out
        else:
            origin, width = args
            if math.isnan(origin) or math.isinf(origin):
                raise PFARuntimeException("bad histogram range", self.errcodeBase + 0, self.name, pos)
            if width <= 0.0 or math.isnan(width):
                raise PFARuntimeException("bad histogram scale", self.errcodeBase + 1, self.name, pos)
            if math.isnan(x) or math.isinf(x):
                raise PFARuntimeException("x out of range", self.errcodeBase + 2, self.name, pos)
            else:
                return int(math.floor(div((x - origin), width))) 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def __call__(self, state, scope, pos, paramTypes, str):
        try:
            out = float(str)
        except ValueError:
            raise PFARuntimeException("not a single-precision float", self.errcodeBase + 0, self.name, pos)
        if math.isnan(out):
            return out
        elif math.isinf(out):
            return out
        elif out > FLOAT_MAX_VALUE:
            return float("inf")
        elif -out > FLOAT_MAX_VALUE:
            return float("-inf")
        elif abs(out) < FLOAT_MIN_VALUE:
            return 0.0
        else:
            return out 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def __call__(self, state, scope, pos, paramTypes, state_):
        chi2 = state_["chi2"]
        dof = state_["dof"]
        if dof < 0:
            raise PFARuntimeException("invalid parameterization", self.errcodeBase + 0, self.name, pos)
        elif dof == 0:
            if chi2 > 0:
                return 1.0
            else:
                return 0.0
        elif math.isnan(chi2):
            return float("nan")
        elif math.isinf(chi2):
            if chi2 > 0:
                return 1.0
            else:
                return 0.0
        else:
            return float(Chi2Distribution(dof, self.errcodeBase + 0, self.name, pos).CDF(chi2)) 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def __call__(self, state, scope, pos, paramTypes, x, *others):
        if len(others) == 2:
            mu, sigma = others
        else:
            mu = others[0]["mean"]
            if math.isnan(others[0]["variance"]) or others[0]["variance"] < 0.0:
                raise PFARuntimeException("invalid parameterization", self.errcodeBase + 0, self.name, pos)
            else:
                sigma = math.sqrt(others[0]["variance"])
        if math.isinf(mu) or math.isnan(mu) or math.isinf(sigma) or math.isnan(sigma) or sigma < 0.0:
            raise PFARuntimeException("invalid parameterization", self.errcodeBase + 0, self.name, pos)
        elif math.isinf(x) or math.isnan(x):
            raise PFARuntimeException("invalid input", self.errcodeBase + 1, self.name, pos)
        elif sigma == 0.0:
            if x != mu:
                return float("-inf")
            else:
                return float("inf")
        else:
            return GaussianDistribution(mu, sigma, self.errcodeBase + 0, self.name, pos).LL(x) 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def __call__(self, state, scope, pos, paramTypes, x):
        if isinstance(x, (list, tuple)) and all(isinstance(xi, (list, tuple)) for xi in x):
            rows = len(x)
            if rows < 1:
                raise PFARuntimeException("too few rows/cols", self.errcodeBase + 0, self.name, pos)
            cols = len(x[0])
            if cols < 1:
                raise PFARuntimeException("too few rows/cols", self.errcodeBase + 0, self.name, pos)
            if raggedArray(x):
                raise PFARuntimeException("ragged columns", self.errcodeBase + 1, self.name, pos)
            if rows != cols:
                raise PFARuntimeException("non-square matrix", self.errcodeBase + 2, self.name, pos)
            if any(any(math.isnan(z) or math.isinf(z) for z in row) for row in x):
                raise PFARuntimeException("non-finite matrix", self.errcodeBase + 3, self.name, pos)
            return matrixToArrays(self.calculate(arraysToMatrix(x), rows))

        elif isinstance(x, dict) and all(isinstance(x[i], dict) for i in x.keys()):
            keys = list(rowKeys(x).union(colKeys(x)))
            if len(keys) < 1 or all(len(z) == 0 for z in x.values()):
                raise PFARuntimeException("too few rows/cols", self.errcodeBase + 0, self.name, pos)
            if any(any(math.isnan(z) or math.isinf(z) for z in row.values()) for row in x.values()):
                raise PFARuntimeException("non-finite matrix", self.errcodeBase + 3, self.name, pos)
            return matrixToMaps(self.calculate(mapsToMatrix(x, keys, keys), len(keys)), map(str, xrange(len(keys))), keys) 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def logpdf(self, rowid, targets, constraints=None, inputs=None):
        if constraints is None:
            constraints = {}
        if inputs is None:
            inputs = {}
        # Compute joint probability.
        samples_joint, weights_joint = zip(*[
            self.weighted_sample(
                rowid, [], gu.merged(targets, constraints), inputs)
            for _i in xrange(self.accuracy)
        ])
        logp_joint = gu.logmeanexp(weights_joint)
        # Compute marginal probability.
        samples_marginal, weights_marginal = zip(*[
            self.weighted_sample(rowid, [], constraints, inputs)
            for _i in xrange(self.accuracy)
        ]) if constraints else ({}, [0.])
        if all(isinf(l) for l in weights_marginal):
            raise ValueError('Zero density constraints: %s' % (constraints,))
        logp_constraints = gu.logmeanexp(weights_marginal)
        # Return log ratio.
        return logp_joint - logp_constraints 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def is_nan_or_inf(number):
  return math.isnan(number) or math.isinf(number) 

# 需要导入模块: import math [as 别名]
# 或者: from math import isinf [as 别名]
def _compute_eps(self, log_moments, delta):
    min_eps = float("inf")
    for moment_order, log_moment in log_moments:
      if math.isinf(log_moment) or math.isnan(log_moment):
        sys.stderr.write("The %d-th order is inf or Nan\n" % moment_order)
        continue
      min_eps = min(min_eps, (log_moment - math.log(delta)) / moment_order)
    return min_eps