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utils.py
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utils.py
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import functools
import torch
import torch.nn.functional as F
class cache(object):
"""Computes attribute value and caches it in the instance.
This decorator allows you to create a property which can be computed once and
accessed many times. Sort of like memoization.
"""
def __init__(self, method, name=None):
self.method = method
self.name = name or method.__name__
self.__doc__ = method.__doc__
def __get__(self, obj, cls):
if obj is None:
return self
value = self.method(obj)
setattr(obj, self.name, value)
return value
def lazy_property(fn):
"""Decorator that makes a property lazy-evaluated."""
attr_name = '_' + fn.__name__
@property
def _lazy_property(self):
if not hasattr(self, attr_name):
setattr(self, attr_name, fn(self))
return getattr(self, attr_name)
return _lazy_property
def func_args(func):
"""Return the arguments of `func`."""
try:
code = func.__code__
except AttributeError:
if isinstance(func, functools.partial):
return func_args(func.func)
else:
code = func.__init__.__code__
return code.co_varnames[: code.co_argcount]
def split_kwargs_by_func(func, kwargs):
"Split `kwargs` between those expected by `func` and the others."
args = func_args(func)
func_kwargs = {a: kwargs.pop(a) for a in args if a in kwargs}
return func_kwargs, kwargs
def str2bool(v):
if v.lower() in ('yes', 'true', 't', 'y', '1'):
return True
elif v.lower() in ('no', 'false', 'f', 'n', '0'):
return False
else:
raise TypeError('Boolean value expected.')
def cosine_distance(*x, **y):
return 1 - F.cosine_similarity(*x, **y)
def accuracy(output, target, topk=(1, 5)):
"""Compute the precision@k for the specified values of k."""
with torch.no_grad():
maxk = max(topk)
# batch_size = target.view(-1).size(0)
batch_size = target.reshape(-1).size(0)
_, pred = output.topk(maxk, 1, True, True)
correct = pred.eq(target.unsqueeze(1).expand_as(pred))
res = []
for k in topk:
correct_k = correct[:, :k, ...].contiguous().view(-1).float().sum(0)
res.append(correct_k.mul_(100.0 / batch_size))
return res
class HTML(object):
"""Utility functions for generating html."""
@staticmethod
def head():
return """
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
"""
@staticmethod
def element(elem, inner='', id_='', cls_='', attr=''):
if id_ != '':
id_ = ' id="{}"'.format(id_)
if cls_ != '':
cls_ = ' class="{}"'.format(cls_)
if attr != '':
attr = ' {}'.format(attr)
return '<{}{}{}{}>{}</{}>'.format(elem, id_, cls_, attr, inner, elem)
@staticmethod
def p(inner=''):
return HTML.element('p', inner=inner)
@staticmethod
def div(inner='', id_='', cls_='', attr=''):
return HTML.element('div', inner, id_, cls_, attr)
@staticmethod
def container(content):
return HTML.div(content, cls_='container')
@staticmethod
def ul(li_list, ul_class='', li_class='', li_attr=''):
inner = '\n\t'.join(
[HTML.element('li', li, cls_=li_class, attr=li_attr) for li in li_list]
)
return HTML.element('ul', '\n\t' + inner + '\n', cls_=ul_class)
@staticmethod
def ol(li_list, ol_class='', li_class='', li_attr=''):
inner = '\n\t'.join(
[HTML.element('li', li, cls_=li_class, attr=li_attr) for li in li_list]
)
return HTML.element('ol', '\n\t' + inner + '\n', cls_=ol_class)
@staticmethod
def img(src=''):
return HTML.element('img', attr='src="{}"'.format(src))
@staticmethod
def video(
src='',
preload='auto',
onmouseover='this.play();',
onmouseout='this.pause();',
style='',
):
return HTML.element(
'video',
attr='src="{}" onmouseover="{}" onmouseout="{}" style="{}"'.format(
src, onmouseover, onmouseout, style
),
)
@staticmethod
def a(inner='', href='', data_toggle=''):
return HTML.element(
'a',
inner=inner,
attr='href="{}" data-toggle="{}"'.format(href, data_toggle),
)
@staticmethod
def panel(label, category, li):
return HTML.div(
cls_='panel panel-default',
inner='\n'.join(
[
HTML.div(
cls_='panel-heading',
inner=HTML.element(
'h4',
cls_="panel-title",
inner=HTML.a(
data_toggle='collapse',
href='#{}'.format(label),
inner='{} (n={})'.format(category, len(li)),
),
),
),
HTML.div(
id_='{}'.format(label),
cls_='panel-collapse collapse',
inner=HTML.ul(
HTML.li,
ul_class='list-group',
li_class='list-group-item',
li_attr="style=\"overflow: auto;\"",
),
),
]
),
)
@staticmethod
def panel_group(html):
return HTML.div(
cls_='panel-group',
inner='\n'.join(
[
HTML.panel(label, ground_truth, predictions)
for (label, ground_truth), predictions in html.items()
]
),
)
@staticmethod
def format_div(header, im_name, gif_name):
html = """
<h4>{}</h4>
<img style="float: left;" src="{}"/>
<img style="float: left;" src="{}"/>
"""
return html.format(header, im_name, gif_name)