util.py

# Copyright (c) Microsoft Corporation
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#
# MIT License
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'''
Util Module
'''

import time

import tensorflow as tf


def shape(tensor):
    '''
    Get shape of variable.
    Return type is tuple.
    '''
    temp_s = tensor.get_shape()
    return tuple([temp_s[i].value for i in range(0, len(temp_s))])


def get_variable(name, temp_s):
    '''
    Get variable by name.
    '''
    return tf.Variable(tf.zeros(temp_s), name=name)


def dropout(tensor, drop_prob, is_training):
    '''
    Dropout except test.
    '''
    if not is_training:
        return tensor
    return tf.nn.dropout(tensor, 1.0 - drop_prob)


class Timer:
    '''
    Class Timer is for calculate time.
    '''
    def __init__(self):
        self.__start = time.time()

    def start(self):
        '''
        Start to calculate time.
        '''
        self.__start = time.time()

    def get_elapsed(self, restart=True):
        '''
        Calculate time span.
        '''
        end = time.time()
        span = end - self.__start
        if restart:
            self.__start = end
        return span