End-To-End Memory Networks in Tensorflow

Tensorflow implementation of End-To-End Memory Networks for language modeling (see Section 5). The original torch code from Facebook can be found here.

Prerequisites

This code requires Tensorflow. There is a set of sample Penn Tree Bank (PTB) corpus in data directory, which is a popular benchmark for measuring quality of these models. But you can use your own text data set which should be formated like this.

Usage

To train a model with 8 hops and memory size of 200, run the following command:

$ python main.py --nhop 8 --mem_size 200

To see all training options, run:

$ python main.py --help

which will print:

usage: main.py [-h] [--edim EDIM] [--lindim LINDIM] [--nhop NHOP]
              [--mem_size MEM_SIZE] [--batch_size BATCH_SIZE]
              [--nepoch NEPOCH] [--init_lr INIT_LR] [--init_hid INIT_HID]
              [--init_std INIT_STD] [--max_grad_norm MAX_GRAD_NORM]
              [--data_dir DATA_DIR] [--data_name DATA_NAME] [--show SHOW]
              [--noshow]

optional arguments:
  -h, --help            show this help message and exit
  --edim EDIM           internal state dimension [150]
  --lindim LINDIM       linear part of the state [75]
  --nhop NHOP           number of hops [6]
  --mem_size MEM_SIZE   memory size [100]
  --batch_size BATCH_SIZE
                        batch size to use during training [128]
  --nepoch NEPOCH       number of epoch to use during training [100]
  --init_lr INIT_LR     initial learning rate [0.01]
  --init_hid INIT_HID   initial internal state value [0.1]
  --init_std INIT_STD   weight initialization std [0.05]
  --max_grad_norm MAX_GRAD_NORM
                        clip gradients to this norm [50]
  --checkpoint_dir CHECKPOINT_DIR
                        checkpoint directory [checkpoints]
  --data_dir DATA_DIR   data directory [data]
  --data_name DATA_NAME
                        data set name [ptb]
  --is_test IS_TEST     True for testing, False for Training [False]
  --nois_test
  --show SHOW           print progress [False]
  --noshow

(Optional) If you want to see a progress bar, install progress with pip:

$ pip install progress
$ python main.py --nhop 6 --mem_size 100 --show True

After training is finished, you can test and validate with:

$ python main.py --is_test True --show True

The training output looks like:

$ python main.py --nhop 6 --mem_size 100 --show True
Read 929589 words from data/ptb.train.txt
Read 73760 words from data/ptb.valid.txt
Read 82430 words from data/ptb.test.txt
{'batch_size': 128,
'data_dir': 'data',
'data_name': 'ptb',
'edim': 150,
'init_hid': 0.1,
'init_lr': 0.01,
'init_std': 0.05,
'lindim': 75,
'max_grad_norm': 50,
'mem_size': 100,
'nepoch': 100,
'nhop': 6,
'nwords': 10000,
'show': True}
I tensorflow/core/common_runtime/local_device.cc:25] Local device intra op parallelism threads: 12
I tensorflow/core/common_runtime/direct_session.cc:45] Direct session inter op parallelism threads: 12
Training |################################| 100.0% | ETA: 0s
Testing |################################| 100.0% | ETA: 0s
{'perplexity': 507.3536108810464, 'epoch': 0, 'valid_perplexity': 285.19489755719286, 'learning_rate': 0.01}
Training |################################| 100.0% | ETA: 0s
Testing |################################| 100.0% | ETA: 0s
{'perplexity': 218.49577035468886, 'epoch': 1, 'valid_perplexity': 231.73457031084268, 'learning_rate': 0.01}
Training |################################| 100.0% | ETA: 0s
Testing |################################| 100.0% | ETA: 0s
{'perplexity': 163.5527845871247, 'epoch': 2, 'valid_perplexity': 175.38771414841014, 'learning_rate': 0.01}
Training |################################| 100.0% | ETA: 0s
Testing |################################| 100.0% | ETA: 0s
{'perplexity': 136.1443535538306, 'epoch': 3, 'valid_perplexity': 161.62522958776597, 'learning_rate': 0.01}
Training |################################| 100.0% | ETA: 0s
Testing |################################| 100.0% | ETA: 0s
{'perplexity': 119.15373237680929, 'epoch': 4, 'valid_perplexity': 149.00768378137946, 'learning_rate': 0.01}
Training |##############                  | 44.0% | ETA: 378s

Performance

The perplexity on the test sets of Penn Treebank corpora.

# of hidden	# of hops	memory size	MemN2N (Sukhbaatar 2015)	This repo.
150	3	100	122	129
150	6	150	114	in progress

Author

Taehoon Kim / @carpedm20