INSTRUCTION stringlengths 1 8.43k | RESPONSE stringlengths 75 104k |
|---|---|
First part of the discriminator which takes a 32x32 image as input and output a convolutional feature map this is required to calculate the layer loss | def discriminator1(ndf, no_bias=True, fix_gamma=True, eps=1e-5 + 1e-12):
'''First part of the discriminator which takes a 32x32 image as input
and output a convolutional feature map, this is required to calculate
the layer loss'''
BatchNorm = mx.sym.BatchNorm
data = mx.sym.Variable('data')
d1 ... |
Second part of the discriminator which takes a 256x8x8 feature map as input and generates the loss based on whether the input image was a real one or fake one | def discriminator2(ndf, no_bias=True, fix_gamma=True, eps=1e-5 + 1e-12):
'''Second part of the discriminator which takes a 256x8x8 feature map as input
and generates the loss based on whether the input image was a real one or fake one'''
BatchNorm = mx.sym.BatchNorm
data = mx.sym.Variable('data')
... |
GaussianLogDensity loss calculation for layer wise loss | def GaussianLogDensity(x, mu, log_var, name='GaussianLogDensity', EPSILON = 1e-6):
'''GaussianLogDensity loss calculation for layer wise loss
'''
c = mx.sym.ones_like(log_var)*2.0 * 3.1416
c = mx.symbol.log(c)
var = mx.sym.exp(log_var)
x_mu2 = mx.symbol.square(x - mu) # [Issue] not sure the di... |
Calculate the discriminator layer loss | def DiscriminatorLayerLoss():
'''Calculate the discriminator layer loss
'''
data = mx.sym.Variable('data')
label = mx.sym.Variable('label')
data = mx.sym.Flatten(data)
label = mx.sym.Flatten(label)
label = mx.sym.BlockGrad(label)
zeros = mx.sym.zeros_like(data)
output = -Gaussi... |
KLDivergenceLoss loss | def KLDivergenceLoss():
'''KLDivergenceLoss loss
'''
data = mx.sym.Variable('data')
mu1, lv1 = mx.sym.split(data, num_outputs=2, axis=0)
mu2 = mx.sym.zeros_like(mu1)
lv2 = mx.sym.zeros_like(lv1)
v1 = mx.sym.exp(lv1)
v2 = mx.sym.exp(lv2)
mu_diff_sq = mx.sym.square(mu1 - mu2)
di... |
Get the dataset | def get_data(path, activation):
'''Get the dataset
'''
data = []
image_names = []
for filename in os.listdir(path):
img = cv2.imread(os.path.join(path,filename), cv2.IMREAD_GRAYSCALE)
image_names.append(filename)
if img is not None:
data.append(img)
data = np... |
fill the ith grid of the buffer matrix with the values from the img buf: buffer matrix i: serial of the image in the 2D grid img: image data shape: ( height width depth ) of image | def fill_buf(buf, i, img, shape):
'''fill the ith grid of the buffer matrix with the values from the img
buf : buffer matrix
i : serial of the image in the 2D grid
img : image data
shape : ( height width depth ) of image'''
# grid height is a multiple of individual image height
m = buf.shap... |
create a grid of images and save it as a final image title: grid image name X: array of images | def visual(title, X, activation):
'''create a grid of images and save it as a final image
title : grid image name
X : array of images
'''
assert len(X.shape) == 4
X = X.transpose((0, 2, 3, 1))
if activation == 'sigmoid':
X = np.clip((X)*(255.0), 0, 255).astype(np.uint8)
elif act... |
adversarial training of the VAE | def train(dataset, nef, ndf, ngf, nc, batch_size, Z, lr, beta1, epsilon, ctx, check_point, g_dl_weight, output_path, checkpoint_path, data_path, activation,num_epoch, save_after_every, visualize_after_every, show_after_every):
'''adversarial training of the VAE
'''
#encoder
z_mu, z_lv, z = encoder(nef,... |
Creates/ Validates dir | def create_and_validate_dir(data_dir):
'''Creates/Validates dir
'''
if data_dir != "":
if not os.path.exists(data_dir):
try:
logging.info('create directory %s', data_dir)
os.makedirs(data_dir)
except OSError as exc:
if exc.errno... |
Parse args | def parse_args():
'''Parse args
'''
parser = argparse.ArgumentParser(description='Train and Test an Adversarial Variatiional Encoder')
parser.add_argument('--train', help='train the network', action='store_true')
parser.add_argument('--test', help='test the network', action='store_true')
parser... |
Gets root mse between the logarithms of the prediction and the truth. | def get_rmse_log(net, X_train, y_train):
"""Gets root mse between the logarithms of the prediction and the truth."""
num_train = X_train.shape[0]
clipped_preds = nd.clip(net(X_train), 1, float('inf'))
return np.sqrt(2 * nd.sum(square_loss(
nd.log(clipped_preds), nd.log(y_train))).asscalar() / nu... |
Gets a neural network. Better results are obtained with modifications. | def get_net():
"""Gets a neural network. Better results are obtained with modifications."""
net = gluon.nn.Sequential()
with net.name_scope():
net.add(gluon.nn.Dense(50, activation="relu"))
net.add(gluon.nn.Dense(1))
net.initialize()
return net |
Trains the model. | def train(net, X_train, y_train, epochs, verbose_epoch, learning_rate,
weight_decay, batch_size):
"""Trains the model."""
dataset_train = gluon.data.ArrayDataset(X_train, y_train)
data_iter_train = gluon.data.DataLoader(dataset_train, batch_size,
shuffle... |
Conducts k - fold cross validation for the model. | def k_fold_cross_valid(k, epochs, verbose_epoch, X_train, y_train,
learning_rate, weight_decay, batch_size):
"""Conducts k-fold cross validation for the model."""
assert k > 1
fold_size = X_train.shape[0] // k
train_loss_sum = 0.0
test_loss_sum = 0.0
for test_idx in range... |
Trains the model and predicts on the test data set. | def learn(epochs, verbose_epoch, X_train, y_train, test, learning_rate,
weight_decay, batch_size):
"""Trains the model and predicts on the test data set."""
net = get_net()
_ = train(net, X_train, y_train, epochs, verbose_epoch, learning_rate,
weight_decay, batch_size)
preds =... |
Create CapsNet | def capsnet(batch_size, n_class, num_routing, recon_loss_weight):
"""Create CapsNet"""
# data.shape = [batch_size, 1, 28, 28]
data = mx.sym.Variable('data')
input_shape = (1, 28, 28)
# Conv2D layer
# net.shape = [batch_size, 256, 20, 20]
conv1 = mx.sym.Convolution(data=data,
... |
Perform CapsNet training | def do_training(num_epoch, optimizer, kvstore, learning_rate, model_prefix, decay):
"""Perform CapsNet training"""
summary_writer = SummaryWriter(args.tblog_dir)
lr_scheduler = SimpleLRScheduler(learning_rate)
optimizer_params = {'lr_scheduler': lr_scheduler}
module.init_params()
module.init_opt... |
Shuffle the data. | def _shuffle(data, idx):
"""Shuffle the data."""
shuffle_data = []
for idx_k, idx_v in data:
shuffle_data.append((idx_k, mx.ndarray.array(idx_v.asnumpy()[idx], idx_v.context)))
return shuffle_data |
Update the hyper - parameters and loss of CapsNet | def update(self, labels, preds):
"""Update the hyper-parameters and loss of CapsNet"""
batch_sum_metric = 0
batch_num_inst = 0
for label, pred_outcaps in zip(labels[0], preds[0]):
label_np = int(label.asnumpy())
pred_label = int(np.argmax(pred_outcaps.asnumpy()))
... |
Reset class MNISTCustomIter ( mx. io. NDArrayIter ): | def reset(self):
"""Reset class MNISTCustomIter(mx.io.NDArrayIter):"""
# shuffle data
if self.is_train:
np.random.shuffle(self.idx)
self.data = _shuffle(self.data, self.idx)
self.label = _shuffle(self.label, self.idx)
if self.last_batch_handle == 'rol... |
Generate next of iterator | def next(self):
"""Generate next of iterator"""
if self.iter_next():
if self.is_train:
data_raw_list = self.getdata()
data_shifted = []
for data_raw in data_raw_list[0]:
data_shifted.append(random_shift(data_raw.asnumpy(), 0... |
Get the attribute dict given the attribute set by the symbol. | def get(self, attr):
"""
Get the attribute dict given the attribute set by the symbol.
Parameters
----------
attr : dict of string to string
The attribute passed in by user during symbol creation.
Returns
-------
attr : dict of string to stri... |
Create kvstore assuming some parameters storage types are row_sparse. | def _create_sparse_kvstore(kvstore):
"""Create kvstore assuming some parameters' storage types are row_sparse.
Parameters
----------
kvstore : KVStore or str
The kvstore.
Returns
-------
kvstore : KVStore
update_on_kvstore : bool. Always True.
"""
# always update on kvs... |
Create kvstore This function select and create a proper kvstore if given the kvstore type. | def _create_kvstore(kvstore, num_device, arg_params):
"""Create kvstore
This function select and create a proper kvstore if given the kvstore type.
Parameters
----------
kvstore : KVStore or str
The kvstore.
num_device : int
The number of devices
arg_params : dict of str to ... |
Initialize kvstore | def _initialize_kvstore(kvstore, param_arrays, arg_params, param_names, update_on_kvstore):
"""Initialize kvstore"""
for idx, param_on_devs in enumerate(param_arrays):
name = param_names[idx]
kvstore.init(name, arg_params[name])
if update_on_kvstore:
kvstore.pull(name, param... |
Perform update of param_arrays from grad_arrays on NCCL kvstore. | def _update_params_on_kvstore_nccl(param_arrays, grad_arrays, kvstore, param_names):
"""Perform update of param_arrays from grad_arrays on NCCL kvstore."""
valid_indices = [index for index, grad_list in
enumerate(grad_arrays) if grad_list[0] is not None]
valid_grad_arrays = [grad_arrays... |
Perform update of param_arrays from grad_arrays on kvstore. | def _update_params_on_kvstore(param_arrays, grad_arrays, kvstore, param_names):
"""Perform update of param_arrays from grad_arrays on kvstore."""
for index, pair in enumerate(zip(param_arrays, grad_arrays)):
arg_list, grad_list = pair
if grad_list[0] is None:
continue
name = ... |
Perform update of param_arrays from grad_arrays not on kvstore. | def _update_params(param_arrays, grad_arrays, updater, num_device,
kvstore=None, param_names=None):
"""Perform update of param_arrays from grad_arrays not on kvstore."""
updates = [[] for _ in range(num_device)]
for i, pair in enumerate(zip(param_arrays, grad_arrays)):
arg_list, g... |
Sends args and kwargs to any configured callbacks. This handles the cases where the callbacks variable is None a single function or a list. | def _multiple_callbacks(callbacks, *args, **kwargs):
"""Sends args and kwargs to any configured callbacks.
This handles the cases where the 'callbacks' variable
is ``None``, a single function, or a list.
"""
if isinstance(callbacks, list):
for cb in callbacks:
cb(*args, **kwargs)... |
Internal training function on multiple devices. This function will also work for single device as well. | def _train_multi_device(symbol, ctx, arg_names, param_names, aux_names,
arg_params, aux_params,
begin_epoch, end_epoch, epoch_size, optimizer,
kvstore, update_on_kvstore,
train_data, eval_data=None, eval_metric=None,
... |
Checkpoint the model data into file. | def save_checkpoint(prefix, epoch, symbol, arg_params, aux_params):
"""Checkpoint the model data into file.
Parameters
----------
prefix : str
Prefix of model name.
epoch : int
The epoch number of the model.
symbol : Symbol
The input Symbol.
arg_params : dict of str ... |
Load model checkpoint from file. | def load_checkpoint(prefix, epoch):
"""Load model checkpoint from file.
Parameters
----------
prefix : str
Prefix of model name.
epoch : int
Epoch number of model we would like to load.
Returns
-------
symbol : Symbol
The symbol configuration of computation netw... |
verify the argument of the default symbol and user provided parameters | def _check_arguments(self):
"""verify the argument of the default symbol and user provided parameters"""
if self.argument_checked:
return
assert(self.symbol is not None)
self.argument_checked = True
# check if symbol contain duplicated names.
_check_argument... |
Initialize weight parameters and auxiliary states. | def _init_params(self, inputs, overwrite=False):
"""Initialize weight parameters and auxiliary states."""
inputs = [x if isinstance(x, DataDesc) else DataDesc(*x) for x in inputs]
input_shapes = {item.name: item.shape for item in inputs}
arg_shapes, _, aux_shapes = self.symbol.infer_shap... |
Initialize the predictor module for running prediction. | def _init_predictor(self, input_shapes, type_dict=None):
"""Initialize the predictor module for running prediction."""
shapes = {name: self.arg_params[name].shape for name in self.arg_params}
shapes.update(dict(input_shapes))
if self._pred_exec is not None:
arg_shapes, _, _ =... |
Initialize the iterator given input. | def _init_iter(self, X, y, is_train):
"""Initialize the iterator given input."""
if isinstance(X, (np.ndarray, nd.NDArray)):
if y is None:
if is_train:
raise ValueError('y must be specified when X is numpy.ndarray')
else:
... |
Initialize the iterator given eval_data. | def _init_eval_iter(self, eval_data):
"""Initialize the iterator given eval_data."""
if eval_data is None:
return eval_data
if isinstance(eval_data, (tuple, list)) and len(eval_data) == 2:
if eval_data[0] is not None:
if eval_data[1] is None and isinstance... |
Run the prediction always only use one device. | def predict(self, X, num_batch=None, return_data=False, reset=True):
"""Run the prediction, always only use one device.
Parameters
----------
X : mxnet.DataIter
num_batch : int or None
The number of batch to run. Go though all batches if ``None``.
Returns
... |
Run the model given an input and calculate the score as assessed by an evaluation metric. | def score(self, X, eval_metric='acc', num_batch=None, batch_end_callback=None, reset=True):
"""Run the model given an input and calculate the score
as assessed by an evaluation metric.
Parameters
----------
X : mxnet.DataIter
eval_metric : metric.metric
The m... |
Fit the model. | def fit(self, X, y=None, eval_data=None, eval_metric='acc',
epoch_end_callback=None, batch_end_callback=None, kvstore='local', logger=None,
work_load_list=None, monitor=None, eval_end_callback=LogValidationMetricsCallback(),
eval_batch_end_callback=None):
"""Fit the model.
... |
Checkpoint the model checkpoint into file. You can also use pickle to do the job if you only work on Python. The advantage of load and save ( as compared to pickle ) is that the resulting file can be loaded from other MXNet language bindings. One can also directly load/ save from/ to cloud storage ( S3 HDFS ) | def save(self, prefix, epoch=None):
"""Checkpoint the model checkpoint into file.
You can also use `pickle` to do the job if you only work on Python.
The advantage of `load` and `save` (as compared to `pickle`) is that
the resulting file can be loaded from other MXNet language bindings.
... |
Load model checkpoint from file. | def load(prefix, epoch, ctx=None, **kwargs):
"""Load model checkpoint from file.
Parameters
----------
prefix : str
Prefix of model name.
epoch : int
epoch number of model we would like to load.
ctx : Context or list of Context, optional
... |
Functional style to create a model. This function is more consistent with functional languages such as R where mutation is not allowed. | def create(symbol, X, y=None, ctx=None,
num_epoch=None, epoch_size=None, optimizer='sgd', initializer=Uniform(0.01),
eval_data=None, eval_metric='acc',
epoch_end_callback=None, batch_end_callback=None,
kvstore='local', logger=None, work_load_list=None,
... |
Entry point to build and upload all built dockerimages in parallel: param platforms: List of platforms: param registry: Docker registry name: param load_cache: Load cache before building: return: 1 if error occurred 0 otherwise | def build_save_containers(platforms, registry, load_cache) -> int:
"""
Entry point to build and upload all built dockerimages in parallel
:param platforms: List of platforms
:param registry: Docker registry name
:param load_cache: Load cache before building
:return: 1 if error occurred, 0 otherw... |
Build image for passed platform and upload the cache to the specified S3 bucket: param platform: Platform: param registry: Docker registry name: param load_cache: Load cache before building: return: Platform if failed None otherwise | def _build_save_container(platform, registry, load_cache) -> Optional[str]:
"""
Build image for passed platform and upload the cache to the specified S3 bucket
:param platform: Platform
:param registry: Docker registry name
:param load_cache: Load cache before building
:return: Platform if faile... |
Upload the passed image by id tag it with docker tag and upload to S3 bucket: param registry: Docker registry name: param docker_tag: Docker tag: param image_id: Image id: return: None | def _upload_image(registry, docker_tag, image_id) -> None:
"""
Upload the passed image by id, tag it with docker tag and upload to S3 bucket
:param registry: Docker registry name
:param docker_tag: Docker tag
:param image_id: Image id
:return: None
"""
# We don't have to retag the image ... |
Login to the Docker Hub account: return: None | def _login_dockerhub():
"""
Login to the Docker Hub account
:return: None
"""
dockerhub_credentials = _get_dockerhub_credentials()
logging.info('Logging in to DockerHub')
# We use password-stdin instead of --password to avoid leaking passwords in case of an error.
# This method will pro... |
Load the precompiled docker cache from the registry: param registry: Docker registry name: param docker_tag: Docker tag to load: return: None | def load_docker_cache(registry, docker_tag) -> None:
"""
Load the precompiled docker cache from the registry
:param registry: Docker registry name
:param docker_tag: Docker tag to load
:return: None
"""
# We don't have to retag the image since it's already in the right format
if not regi... |
Delete the local docker cache for the entire docker image chain: param docker_tag: Docker tag: return: None | def delete_local_docker_cache(docker_tag):
"""
Delete the local docker cache for the entire docker image chain
:param docker_tag: Docker tag
:return: None
"""
history_cmd = ['docker', 'history', '-q', docker_tag]
try:
image_ids_b = subprocess.check_output(history_cmd)
image_... |
Utility to create and publish the Docker cache to Docker Hub: return: | def main() -> int:
"""
Utility to create and publish the Docker cache to Docker Hub
:return:
"""
# We need to be in the same directory than the script so the commands in the dockerfiles work as
# expected. But the script can be invoked from a different path
base = os.path.split(os.path.realp... |
Download the chinese_text dataset and unzip it | def get_chinese_text():
"""Download the chinese_text dataset and unzip it"""
if not os.path.isdir("data/"):
os.system("mkdir data/")
if (not os.path.exists('data/pos.txt')) or \
(not os.path.exists('data/neg')):
os.system("wget -q https://raw.githubusercontent.com/dmlc/web-data/master... |
Loads MR polarity data from files splits the data into words and generates labels. Returns split sentences and labels. | def load_data_and_labels():
"""Loads MR polarity data from files, splits the data into words and generates labels.
Returns split sentences and labels.
"""
# download dataset
get_chinese_text()
# Load data from files
positive_examples = list(codecs.open("./data/pos.txt", "r", "utf-8").readli... |
override reset behavior | def reset(self):
"""
override reset behavior
"""
if getattr(self, 'num', None) is None:
self.num_inst = 0
self.sum_metric = 0.0
else:
self.num_inst = [0] * self.num
self.sum_metric = [0.0] * self.num |
override reset behavior | def reset_local(self):
"""
override reset behavior
"""
if getattr(self, 'num', None) is None:
self.num_inst = 0
self.sum_metric = 0.0
else:
self.num_inst = [0] * self.num
self.sum_metric = [0.0] * self.num |
Implementation of updating metrics | def update(self, labels, preds):
"""
Implementation of updating metrics
"""
# get generated multi label from network
cls_prob = preds[0].asnumpy()
loc_loss = preds[1].asnumpy()
cls_label = preds[2].asnumpy()
valid_count = np.sum(cls_label >= 0)
# o... |
Get the current evaluation result. Override the default behavior | def get(self):
"""Get the current evaluation result.
Override the default behavior
Returns
-------
name : str
Name of the metric.
value : float
Value of the evaluation.
"""
if self.num is None:
if self.num_inst == 0:
... |
Structure of the Deep Q Network in the NIPS 2013 workshop paper: Playing Atari with Deep Reinforcement Learning ( https:// www. cs. toronto. edu/ ~vmnih/ docs/ dqn. pdf ) | def dqn_sym_nips(action_num, data=None, name='dqn'):
"""Structure of the Deep Q Network in the NIPS 2013 workshop paper:
Playing Atari with Deep Reinforcement Learning (https://www.cs.toronto.edu/~vmnih/docs/dqn.pdf)
Parameters
----------
action_num : int
data : mxnet.sym.Symbol, optional
n... |
A wrapper for the user - defined handle. | def _monitor_callback_wrapper(callback):
"""A wrapper for the user-defined handle."""
def callback_handle(name, array, _):
""" ctypes function """
callback(name, array)
return callback_handle |
Get the dictionary given name and ndarray pairs. | def _get_dict(names, ndarrays):
"""Get the dictionary given name and ndarray pairs."""
nset = set()
for nm in names:
if nm in nset:
raise ValueError('Duplicate names detected, %s' % str(names))
nset.add(nm)
return dict(zip(names, ndarrays)) |
List all the output NDArray. | def _get_outputs(self):
"""List all the output NDArray.
Returns
-------
A list of ndarray bound to the heads of executor.
"""
out_size = mx_uint()
handles = ctypes.POINTER(NDArrayHandle)()
check_call(_LIB.MXExecutorOutputs(self.handle,
... |
Calculate the outputs specified by the bound symbol. | def forward(self, is_train=False, **kwargs):
"""Calculate the outputs specified by the bound symbol.
Parameters
----------
is_train: bool, optional
Whether this forward is for evaluation purpose. If True,
a backward call is expected to follow.
**kwargs
... |
Do backward pass to get the gradient of arguments. | def backward(self, out_grads=None, is_train=True):
"""Do backward pass to get the gradient of arguments.
Parameters
----------
out_grads : NDArray or list of NDArray or dict of str to NDArray, optional
Gradient on the outputs to be propagated back.
This parameter... |
Install callback for monitor. | def set_monitor_callback(self, callback, monitor_all=False):
"""Install callback for monitor.
Parameters
----------
callback : function
Takes a string and an NDArrayHandle.
monitor_all : bool, default False
If true, monitor both input and output, otherwis... |
Get dictionary representation of argument arrrays. | def arg_dict(self):
"""Get dictionary representation of argument arrrays.
Returns
-------
arg_dict : dict of str to NDArray
The dictionary that maps the names of arguments to NDArrays.
Raises
------
ValueError : if there are duplicated names in the a... |
Get dictionary representation of gradient arrays. | def grad_dict(self):
"""Get dictionary representation of gradient arrays.
Returns
-------
grad_dict : dict of str to NDArray
The dictionary that maps name of arguments to gradient arrays.
"""
if self._grad_dict is None:
self._grad_dict = Executor.... |
Get dictionary representation of auxiliary states arrays. | def aux_dict(self):
"""Get dictionary representation of auxiliary states arrays.
Returns
-------
aux_dict : dict of str to NDArray
The dictionary that maps name of auxiliary states to NDArrays.
Raises
------
ValueError : if there are duplicated names... |
Get dictionary representation of output arrays. | def output_dict(self):
"""Get dictionary representation of output arrays.
Returns
-------
output_dict : dict of str to NDArray
The dictionary that maps name of output names to NDArrays.
Raises
------
ValueError : if there are duplicated names in the ... |
Copy parameters from arg_params aux_params into executor s internal array. | def copy_params_from(self, arg_params, aux_params=None, allow_extra_params=False):
"""Copy parameters from arg_params, aux_params into executor's internal array.
Parameters
----------
arg_params : dict of str to NDArray
Parameters, dict of name to NDArray of arguments.
... |
Return a new executor with the same symbol and shared memory but different input/ output shapes. For runtime reshaping variable length sequences etc. The returned executor shares state with the current one and cannot be used in parallel with it. | def reshape(self, partial_shaping=False, allow_up_sizing=False, **kwargs):
"""Return a new executor with the same symbol and shared memory,
but different input/output shapes.
For runtime reshaping, variable length sequences, etc.
The returned executor shares state with the current one,
... |
Get a debug string about internal execution plan. | def debug_str(self):
"""Get a debug string about internal execution plan.
Returns
-------
debug_str : string
Debug string of the executor.
Examples
--------
>>> a = mx.sym.Variable('a')
>>> b = mx.sym.sin(a)
>>> c = 2 * a + b
... |
parse pascal voc record into a dictionary: param filename: xml file path: return: list of dict | def parse_voc_rec(filename):
"""
parse pascal voc record into a dictionary
:param filename: xml file path
:return: list of dict
"""
import xml.etree.ElementTree as ET
tree = ET.parse(filename)
objects = []
for obj in tree.findall('object'):
obj_dict = dict()
obj_dict[... |
pascal voc evaluation: param detpath: detection results detpath. format ( classname ): param annopath: annotations annopath. format ( classname ): param imageset_file: text file containing list of images: param classname: category name: param cache_dir: caching annotations: param ovthresh: overlap threshold: param use_... | def voc_eval(detpath, annopath, imageset_file, classname, cache_dir, ovthresh=0.5, use_07_metric=False):
"""
pascal voc evaluation
:param detpath: detection results detpath.format(classname)
:param annopath: annotations annopath.format(classname)
:param imageset_file: text file containing list of im... |
Register operators | def register(op_name):
"""Register operators"""
def wrapper(func):
"""Helper function to map functions"""
try:
import onnx as _
MXNetGraph.registry_[op_name] = func
except ImportError:
pass
return func
... |
Convert MXNet layer to ONNX | def convert_layer(node, **kwargs):
"""Convert MXNet layer to ONNX"""
op = str(node["op"])
if op not in MXNetGraph.registry_:
raise AttributeError("No conversion function registered for op type %s yet." % op)
convert_func = MXNetGraph.registry_[op]
return convert_func(... |
Helper function to split params dictionary into args and aux params | def split_params(sym, params):
"""Helper function to split params dictionary into args and aux params
Parameters
----------
sym : :class:`~mxnet.symbol.Symbol`
MXNet symbol object
params : dict of ``str`` to :class:`~mxnet.ndarray.NDArray`
Dict of convert... |
Infer output shapes and return dictionary of output name to shape | def get_outputs(sym, params, in_shape, in_label):
""" Infer output shapes and return dictionary of output name to shape
:param :class:`~mxnet.symbol.Symbol` sym: symbol to perform infer shape on
:param dic of (str, nd.NDArray) params:
:param list of tuple(int, ...) in_shape: list of all... |
Convert weights to numpy | def convert_weights_to_numpy(weights_dict):
"""Convert weights to numpy"""
return dict([(k.replace("arg:", "").replace("aux:", ""), v.asnumpy())
for k, v in weights_dict.items()]) |
Convert MXNet graph to ONNX graph | def create_onnx_graph_proto(self, sym, params, in_shape, in_type, verbose=False):
"""Convert MXNet graph to ONNX graph
Parameters
----------
sym : :class:`~mxnet.symbol.Symbol`
MXNet symbol object
params : dict of ``str`` to :class:`~mxnet.ndarray.NDArray`
... |
Compute learning rate and refactor scheduler | def get_lr_scheduler(learning_rate, lr_refactor_step, lr_refactor_ratio,
num_example, batch_size, begin_epoch):
"""
Compute learning rate and refactor scheduler
Parameters:
---------
learning_rate : float
original learning rate
lr_refactor_step : comma separated str... |
Wrapper for training phase. | def train_net(net, train_path, num_classes, batch_size,
data_shape, mean_pixels, resume, finetune, pretrained, epoch,
prefix, ctx, begin_epoch, end_epoch, frequent, learning_rate,
momentum, weight_decay, lr_refactor_step, lr_refactor_ratio,
freeze_layer_pattern=''... |
This is a set of 50 images representative of ImageNet images. | def imagenet50(display=False, resolution=224):
""" This is a set of 50 images representative of ImageNet images.
This dataset was collected by randomly finding a working ImageNet link and then pasting the
original ImageNet image into Google image search restricted to images licensed for reuse. A
simila... |
Return the boston housing data in a nice package. | def boston(display=False):
""" Return the boston housing data in a nice package. """
d = sklearn.datasets.load_boston()
df = pd.DataFrame(data=d.data, columns=d.feature_names) # pylint: disable=E1101
return df, d.target |
Return the clssic IMDB sentiment analysis training data in a nice package. | def imdb(display=False):
""" Return the clssic IMDB sentiment analysis training data in a nice package.
Full data is at: http://ai.stanford.edu/~amaas/data/sentiment/aclImdb_v1.tar.gz
Paper to cite when using the data is: http://www.aclweb.org/anthology/P11-1015
"""
with open(cache(github_data_url... |
Predict total number of non - violent crimes per 100K popuation. | def communitiesandcrime(display=False):
""" Predict total number of non-violent crimes per 100K popuation.
This dataset is from the classic UCI Machine Learning repository:
https://archive.ics.uci.edu/ml/datasets/Communities+and+Crime+Unnormalized
"""
raw_data = pd.read_csv(
cache(github_d... |
Return the diabetes data in a nice package. | def diabetes(display=False):
""" Return the diabetes data in a nice package. """
d = sklearn.datasets.load_diabetes()
df = pd.DataFrame(data=d.data, columns=d.feature_names) # pylint: disable=E1101
return df, d.target |
Return the classic iris data in a nice package. | def iris(display=False):
""" Return the classic iris data in a nice package. """
d = sklearn.datasets.load_iris()
df = pd.DataFrame(data=d.data, columns=d.feature_names) # pylint: disable=E1101
if display:
return df, [d.target_names[v] for v in d.target] # pylint: disable=E1101
else:
... |
Return the Adult census data in a nice package. | def adult(display=False):
""" Return the Adult census data in a nice package. """
dtypes = [
("Age", "float32"), ("Workclass", "category"), ("fnlwgt", "float32"),
("Education", "category"), ("Education-Num", "float32"), ("Marital Status", "category"),
("Occupation", "category"), ("Relati... |
A nicely packaged version of NHANES I data with surivival times as labels. | def nhanesi(display=False):
""" A nicely packaged version of NHANES I data with surivival times as labels.
"""
X = pd.read_csv(cache(github_data_url + "NHANESI_subset_X.csv"))
y = pd.read_csv(cache(github_data_url + "NHANESI_subset_y.csv"))["y"]
if display:
X_display = X.copy()
X_dis... |
A nicely packaged version of CRIC data with progression to ESRD within 4 years as the label. | def cric(display=False):
""" A nicely packaged version of CRIC data with progression to ESRD within 4 years as the label.
"""
X = pd.read_csv(cache(github_data_url + "CRIC_time_4yearESRD_X.csv"))
y = np.loadtxt(cache(github_data_url + "CRIC_time_4yearESRD_y.csv"))
if display:
X_display = X.c... |
Correlated Groups 60 A simulated dataset with tight correlations among distinct groups of features. | def corrgroups60(display=False):
""" Correlated Groups 60
A simulated dataset with tight correlations among distinct groups of features.
"""
# set a constant seed
old_seed = np.random.seed()
np.random.seed(0)
# generate dataset with known correlation
N = 1000
M = 60
# set... |
A simulated dataset with tight correlations among distinct groups of features. | def independentlinear60(display=False):
""" A simulated dataset with tight correlations among distinct groups of features.
"""
# set a constant seed
old_seed = np.random.seed()
np.random.seed(0)
# generate dataset with known correlation
N = 1000
M = 60
# set one coefficent from ea... |
Ranking datasets from lightgbm repository. | def rank():
""" Ranking datasets from lightgbm repository.
"""
rank_data_url = 'https://raw.githubusercontent.com/Microsoft/LightGBM/master/examples/lambdarank/'
x_train, y_train = sklearn.datasets.load_svmlight_file(cache(rank_data_url + 'rank.train'))
x_test, y_test = sklearn.datasets.load_svmligh... |
An approximation of holdout that only retraines the model once. | def batch_remove_retrain(nmask_train, nmask_test, X_train, y_train, X_test, y_test, attr_train, attr_test, model_generator, metric):
""" An approximation of holdout that only retraines the model once.
This is alse called ROAR (RemOve And Retrain) in work by Google. It is much more computationally
efficient... |
The model is retrained for each test sample with the non - important features set to a constant. | def keep_retrain(nkeep, X_train, y_train, X_test, y_test, attr_test, model_generator, metric, trained_model, random_state):
""" The model is retrained for each test sample with the non-important features set to a constant.
If you want to know how important a set of features is you can ask how the model would b... |
The model is revaluated for each test sample with the non - important features set to their mean. | def keep_mask(nkeep, X_train, y_train, X_test, y_test, attr_test, model_generator, metric, trained_model, random_state):
""" The model is revaluated for each test sample with the non-important features set to their mean.
"""
X_train, X_test = to_array(X_train, X_test)
# how many features to mask
a... |
The model is revaluated for each test sample with the non - important features set to an imputed value. | def keep_impute(nkeep, X_train, y_train, X_test, y_test, attr_test, model_generator, metric, trained_model, random_state):
""" The model is revaluated for each test sample with the non-important features set to an imputed value.
Note that the imputation is done using a multivariate normality assumption on the ... |
The model is revaluated for each test sample with the non - important features set to resample background values. | def keep_resample(nkeep, X_train, y_train, X_test, y_test, attr_test, model_generator, metric, trained_model, random_state):
""" The model is revaluated for each test sample with the non-important features set to resample background values.
""" # why broken? overwriting?
X_train, X_test = to_array(X_train,... |
The how well do the features plus a constant base rate sum up to the model output. | def local_accuracy(X_train, y_train, X_test, y_test, attr_test, model_generator, metric, trained_model):
""" The how well do the features plus a constant base rate sum up to the model output.
"""
X_train, X_test = to_array(X_train, X_test)
# how many features to mask
assert X_train.shape[1] == X_t... |
Generate a random array with a fixed seed. | def const_rand(size, seed=23980):
""" Generate a random array with a fixed seed.
"""
old_seed = np.random.seed()
np.random.seed(seed)
out = np.random.rand(size)
np.random.seed(old_seed)
return out |
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