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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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import copy |
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import logging as loggers |
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import os |
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import re |
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import numpy as np |
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import theano |
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import theano.tensor as T |
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from theano.sandbox.rng_mrg import MRG_RandomStreams as RandomStreams |
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from theano.tensor.shared_randomstreams import RandomStreams as SharedRandomStreams |
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logging = loggers.getLogger(__name__) |
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logging.setLevel(loggers.INFO) |
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""" |
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This file is deprecated. |
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""" |
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FLOATX = theano.config.floatX |
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EPSILON = T.constant(1.0e-15, dtype=FLOATX) |
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BIG_EPSILON = T.constant(1.0e-7, dtype=FLOATX) |
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if 'DEEPY_SEED' in os.environ: |
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global_seed = int(os.environ['DEEPY_SEED']) |
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logging.info("set global random seed to %d" % global_seed) |
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else: |
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global_seed = 3 |
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global_rand = np.random.RandomState(seed=global_seed) |
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global_theano_rand = RandomStreams(seed=global_seed) |
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global_shared_rand = SharedRandomStreams(seed=global_seed) |
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def make_float_matrices(*names): |
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ret = [] |
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for n in names: |
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ret.append(T.matrix(n, dtype=FLOATX)) |
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return ret |
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def make_float_vectors(*names): |
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ret = [] |
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for n in names: |
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ret.append(T.vector(n, dtype=FLOATX)) |
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return ret |
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def back_grad(jacob, err_g): |
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return T.dot(jacob, err_g) |
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# return (jacob.T * err_g).T |
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def build_node_name(n): |
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if "owner" not in dir(n) or "inputs" not in dir(n.owner): |
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return str(n) |
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else: |
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op_name = str(n.owner.op) |
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if "{" not in op_name: |
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op_name = "Elemwise{%s}" % op_name |
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if "," in op_name: |
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op_name = re.sub(r"\{([^}]+),[^}]+\}", "{\\1}", op_name) |
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if "_" in op_name: |
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op_name = re.sub(r"\{[^}]+_([^_}]+)\}", "{\\1}", op_name) |
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return "%s(%s)" % (op_name, ",".join([build_node_name(m) for m in n.owner.inputs])) |
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class VarMap(): |
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def __init__(self): |
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self.varmap = {} |
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def __get__(self, instance, owner): |
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if instance not in self.varmap: |
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return None |
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else: |
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return self.varmap[instance] |
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def __set__(self, instance, value): |
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self.varmap[instance] = value |
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def __contains__(self, item): |
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return item in self.varmap |
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def update_if_not_existing(self, name, value): |
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if name not in self.varmap: |
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self.varmap[name] = value |
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def get(self, name): |
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return self.varmap[name] |
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def set(self, name, value): |
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self.varmap[name] = value |
zomux /
deepy
