old_contents: from __future__ import absolute_import
  import theano
  import theano.tensor as T
  import numpy as np
  
  class Constraint(object):
      def __call__(self, p):
          return p
  
      def get_config(self):
          return {"name":self.__class__.__name__}
  
  class MaxNorm(Constraint):
      def __init__(self, m=2):
          self.m = m
  
      def __call__(self, p):
          norms = T.sqrt(T.sum(T.sqr(p), axis=0))
          desired = T.clip(norms, 0, self.m)
          p = p * (desired / (1e-7 + norms))
          return p
  
      def get_config(self):
          return {"name":self.__class__.__name__,
              "m":self.m}
  
  class NonNeg(Constraint):
      def __call__(self, p):
          p *= T.ge(p, 0)
          return p
  
  class UnitNorm(Constraint):
      def __call__(self, p):
          return p / T.sqrt(T.sum(p**2, axis=-1, keepdims=True))
  
  identity = Constraint
  maxnorm = MaxNorm
  nonneg = NonNeg
  unitnorm = UnitNorm
  
  from .utils.generic_utils import get_from_module
  def get(identifier):
      return get_from_module(identifier, globals(), 'constraint', instantiate=True)
new_contents: from __future__ import absolute_import
  import theano
  import theano.tensor as T
  import numpy as np
  
  class Constraint(object):
      def __call__(self, p):
          return p
  
      def get_config(self):
          return {"name":self.__class__.__name__}
  
  class MaxNorm(Constraint):
      def __init__(self, m=2):
          self.m = m
  
      def __call__(self, p):
          norms = T.sqrt(T.sum(T.sqr(p), axis=0))
          desired = T.clip(norms, 0, self.m)
          p = p * (desired / (1e-7 + norms))
          return p
  
      def get_config(self):
          return {"name":self.__class__.__name__,
              "m":self.m}
  
  class NonNeg(Constraint):
      def __call__(self, p):
          p *= T.ge(p, 0)
          return p
  
  class UnitNorm(Constraint):
      def __call__(self, p):
          return p / T.sqrt(T.sum(p**2, axis=-1, keepdims=True))
  
  identity = Constraint
  maxnorm = MaxNorm
  nonneg = NonNeg
  unitnorm = UnitNorm
  
  from .utils.generic_utils import get_from_module
  def get(identifier, kwargs=None):
      return get_from_module(identifier, globals(), 'constraint', instantiate=True, kwargs=kwargs)
subject: Allow constraint getter to take parameter dict