def display():
# pylint: disable=too-many-branches
def format_zeros(str_val):
"""Zeros should be handled separately as they cannot be negative."""
if float(str_val) == 0:
num_decimals = min(self.variables[row].number_of_decimals,
2)
str_val = f"{0:.{num_decimals}f}"
return str_val
def render_value(value):
if np.isnan(value):
return ""
if np.isinf(value):
return "∞"
str_val = attribute.str_val(value)
if attribute.is_continuous and not attribute.is_time:
str_val = format_zeros(str_val)
return str_val
if column == self.Columns.NAME:
return attribute.name
elif column == self.Columns.DISTRIBUTION:
if isinstance(attribute,
(DiscreteVariable, ContinuousVariable)):
if row not in self.__distributions_cache:
scene = QGraphicsScene(parent=self)
histogram = Histogram(
data=self.table,
variable=attribute,
color_attribute=self.target_var,
border=(0, 0, 2, 0),
border_color='#ccc',
)
scene.addItem(histogram)
self.__distributions_cache[row] = scene
return self.__distributions_cache[row]
elif column == self.Columns.CENTER:
return render_value(self._center[row])
elif column == self.Columns.MEDIAN:
return render_value(self._median[row])
elif column == self.Columns.DISPERSION:
if isinstance(attribute, TimeVariable):
return format_time_diff(self._min[row], self._max[row])
elif isinstance(attribute, DiscreteVariable):
return "%.3g" % self._dispersion[row]
else:
return render_value(self._dispersion[row])
elif column == self.Columns.MIN:
if not isinstance(attribute, DiscreteVariable):
return render_value(self._min[row])
elif column == self.Columns.MAX:
if not isinstance(attribute, DiscreteVariable):
return render_value(self._max[row])
elif column == self.Columns.MISSING:
return '%d (%d%%)' % (self._missing[row], 100 *
self._missing[row] / self.n_instances)
return None
def display():
# pylint: disable=too-many-branches
def render_value(value):
return "" if np.isnan(value) else attribute.str_val(value)
if column == self.Columns.NAME:
return attribute.name
elif column == self.Columns.DISTRIBUTION:
if isinstance(attribute,
(DiscreteVariable, ContinuousVariable)):
if row not in self.__distributions_cache:
scene = QGraphicsScene(parent=self)
histogram = Histogram(
data=self.table,
variable=attribute,
color_attribute=self.target_var,
border=(0, 0, 2, 0),
border_color='#ccc',
)
scene.addItem(histogram)
self.__distributions_cache[row] = scene
return self.__distributions_cache[row]
elif column == self.Columns.CENTER:
return render_value(self._center[row])
elif column == self.Columns.DISPERSION:
if isinstance(attribute, TimeVariable):
return format_time_diff(self._min[row], self._max[row])
elif isinstance(attribute, DiscreteVariable):
return "%.3g" % self._dispersion[row]
else:
return render_value(self._dispersion[row])
elif column == self.Columns.MIN:
if not isinstance(attribute, DiscreteVariable) \
or attribute.ordered:
return render_value(self._min[row])
elif column == self.Columns.MAX:
if not isinstance(attribute, DiscreteVariable) \
or attribute.ordered:
return render_value(self._max[row])
elif column == self.Columns.MISSING:
return '%d (%d%%)' % (
self._missing[row],
100 * self._missing[row] / self.n_instances
)
return None
def data(self, index, role):
# type: (QModelIndex, Qt.ItemDataRole) -> Any
# Text formatting for various data simply requires a lot of branches.
# This is much better than overengineering various formatters...
# pylint: disable=too-many-branches
if not index.isValid():
return None
row, column = self.mapToSourceRows(index.row()), index.column()
# Make sure we're not out of range
if not 0 <= row <= self.n_attributes:
return QVariant()
attribute = self.variables[row]
if role == Qt.BackgroundRole:
if attribute in self.domain.attributes:
return self.COLOR_FOR_ROLE[self.ATTRIBUTE]
elif attribute in self.domain.metas:
return self.COLOR_FOR_ROLE[self.META]
elif attribute in self.domain.class_vars:
return self.COLOR_FOR_ROLE[self.CLASS_VAR]
elif role == Qt.TextAlignmentRole:
if column == self.Columns.NAME:
return Qt.AlignLeft | Qt.AlignVCenter
return Qt.AlignRight | Qt.AlignVCenter
output = None
if column == self.Columns.ICON:
if role == Qt.DecorationRole:
return gui.attributeIconDict[attribute]
elif column == self.Columns.NAME:
if role == Qt.DisplayRole:
output = attribute.name
elif column == self.Columns.DISTRIBUTION:
if role == Qt.DisplayRole:
if isinstance(attribute,
(DiscreteVariable, ContinuousVariable)):
if row not in self.__distributions_cache:
scene = QGraphicsScene(parent=self)
histogram = Histogram(
data=self.table,
variable=attribute,
color_attribute=self.target_var,
border=(0, 0, 2, 0),
border_color='#ccc',
)
scene.addItem(histogram)
self.__distributions_cache[row] = scene
return self.__distributions_cache[row]
elif column == self.Columns.CENTER:
if role == Qt.DisplayRole:
if isinstance(attribute, DiscreteVariable):
output = self._center[row]
if not np.isnan(output):
output = attribute.str_val(self._center[row])
elif isinstance(attribute, TimeVariable):
output = attribute.str_val(self._center[row])
else:
output = self._center[row]
elif column == self.Columns.DISPERSION:
if role == Qt.DisplayRole:
if isinstance(attribute, TimeVariable):
output = format_time_diff(self._min[row], self._max[row])
else:
output = self._dispersion[row]
elif column == self.Columns.MIN:
if role == Qt.DisplayRole:
if isinstance(attribute, DiscreteVariable):
if attribute.ordered:
output = attribute.str_val(self._min[row])
elif isinstance(attribute, TimeVariable):
output = attribute.str_val(self._min[row])
else:
output = self._min[row]
elif column == self.Columns.MAX:
if role == Qt.DisplayRole:
if isinstance(attribute, DiscreteVariable):
if attribute.ordered:
output = attribute.str_val(self._max[row])
elif isinstance(attribute, TimeVariable):
output = attribute.str_val(self._max[row])
else:
output = self._max[row]
elif column == self.Columns.MISSING:
if role == Qt.DisplayRole:
output = '%d (%d%%)' % (self._missing[row], 100 *
self._missing[row] / self.n_instances)
# Consistently format the text inside the table cells
# The easiest way to check for NaN is to compare with itself
if output != output: # pylint: disable=comparison-with-itself
output = ''
# Format ∞ properly
elif output in (np.inf, -np.inf):
output = '%s∞' % ['', '-'][output < 0]
elif isinstance(output, int):
output = locale.format_string('%d', output, grouping=True)
elif isinstance(output, float):
output = locale.format_string('%.2f', output, grouping=True)
return output
