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import random
from AnyQt.QtCore import Qt
from AnyQt.QtWidgets import QSizePolicy
from Orange.data import Table
from Orange.preprocess import Randomize
from Orange.widgets.settings import Setting
from Orange.widgets.utils.widgetpreview import WidgetPreview
from Orange.widgets.widget import OWWidget, Input, Output
from Orange.widgets import gui
class OWRandomize(OWWidget):
name = "Randomize"
description = "Randomize features, class and/or metas in data table."
category = "Transform"
icon = "icons/Random.svg"
priority = 2200
keywords = "randomize, random"
class Inputs:
data = Input("Data", Table)
class Outputs:
data = Output("Data", Table)
resizing_enabled = False
want_main_area = False
shuffle_class = Setting(True)
shuffle_attrs = Setting(False)
shuffle_metas = Setting(False)
scope_prop = Setting(80)
random_seed = Setting(False)
auto_apply = Setting(True)
def __init__(self):
super().__init__()
self.data = None
# GUI
box = gui.hBox(self.controlArea, "Shuffled columns")
box.layout().setSpacing(20)
self.class_check = gui.checkBox(
box, self, "shuffle_class", "Classes",
callback=self._shuffle_check_changed)
self.attrs_check = gui.checkBox(
box, self, "shuffle_attrs", "Features",
callback=self._shuffle_check_changed)
self.metas_check = gui.checkBox(
box, self, "shuffle_metas", "Metas",
callback=self._shuffle_check_changed)
box = gui.vBox(self.controlArea, "Shuffled rows")
hbox = gui.hBox(box)
gui.widgetLabel(hbox, "None")
self.scope_slider = gui.hSlider(
hbox, self, "scope_prop", minValue=0, maxValue=100, width=140,
createLabel=False, callback=self._scope_slider_changed)
gui.widgetLabel(hbox, "All")
self.scope_label = gui.widgetLabel(
box, "", alignment=Qt.AlignCenter,
sizePolicy=(QSizePolicy.MinimumExpanding, QSizePolicy.Fixed))
self._set_scope_label()
self.replicable_check = gui.checkBox(
box, self, "random_seed", "Replicable shuffling",
callback=self._shuffle_check_changed)
gui.auto_apply(self.buttonsArea, self)
@property
def parts(self):
return [self.shuffle_class, self.shuffle_attrs, self.shuffle_metas]
def _shuffle_check_changed(self):
self.commit.deferred()
def _scope_slider_changed(self):
self._set_scope_label()
self.commit.deferred()
def _set_scope_label(self):
self.scope_label.setText("{}%".format(self.scope_prop))
@Inputs.data
def set_data(self, data):
self.data = data
self.commit.now()
@gui.deferred
def commit(self):
data = None
if self.data:
rand_seed = self.random_seed or None
size = int(len(self.data) * self.scope_prop / 100)
random.seed(rand_seed)
indices = sorted(random.sample(range(len(self.data)), size))
type_ = sum(t for t, p in zip(Randomize.Type, self.parts) if p)
randomized = Randomize(type_, rand_seed)(self.data[indices])
data = self.data.copy()
with data.unlocked():
for i, instance in zip(indices, randomized):
data[i] = instance
self.Outputs.data.send(data)
def send_report(self):
labels = ["classes", "features", "metas"]
include = [label for label, i in zip(labels, self.parts) if i]
text = "none" if not include else \
" and ".join(filter(None, (", ".join(include[:-1]), include[-1])))
self.report_items(
"Settings",
[("Shuffled columns", text),
("Proportion of shuffled rows", "{}%".format(self.scope_prop)),
("Replicable", "yes" if self.random_seed else "no")])
if __name__ == "__main__": # pragma: no cover
WidgetPreview(OWRandomize).run(Table("iris"))
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