Remove @Property usage + styles

Author: grhkm21

src/sage/stats/all.py

@@ -2,7 +2,7 @@
 from .r import ttest
 from .basic_stats import (mean, mode, std, variance, median, moving_average)
 from .hmm import all as hmm
-from .distributions import (DGI, DGL, DGP)
+from .distributions.all import *
 
 # We lazy_import the following modules since they import numpy which
 # slows down sage startup

src/sage/stats/distributions/__init__.py

@@ -0,0 +1,6 @@
+# We lazy_import the following modules since they import numpy which
+# slows down sage startup
+from sage.misc.lazy_import import lazy_import
+lazy_import("sage.stats.distributions.discrete_gaussian_integer", ["DiscreteGaussianDistributionIntegerSampler"])
+lazy_import("sage.stats.distributions.discrete_gaussian_lattice", ["DiscreteGaussianDistributionLatticeSampler"])
+lazy_import("sage.stats.distributions.discrete_gaussian_polynomial", ["DiscreteGaussianDistributionPolynomialSampler"])

src/sage/stats/distributions/all.py

@@ -496,4 +496,3 @@ cdef class DiscreteGaussianDistributionIntegerSampler(SageObject):
         return f"Discrete Gaussian sampler over the Integers with sigma = {self.sigma:.6f} and c = {self.c:.6f}"
 
 
-DGI = DiscreteGaussianDistributionIntegerSampler