我有这段代码，当我在PyQt中运行它时，它运行得很好，但当我在pyside中运行时，情况会变得更糟。我得到了我应该得到的所有列和行，如果我通过脚本访问它们并获得数据，每个单元格都会说明它应该得到什么。然而，即使我将这些设置为显示角色，表中也不会显示任何文本。标头中没有，任何单元格中都没有。我不知所措！
（对于那些想知道的人来说，NulLVariant（）只返回None或QVariant（），具体取决于是否在pyside或pyqt上）
该模型旨在使用字典列表来添加行，并使用字典键来创建列。
class CustomTableModel(QtCore.QAbstractTableModel):
def __init__(self, parent=None, parentTable=None):
"""
Custom data model for holding table data.
:param parent: The parent widget/layout so that this data model gets deleted properly on close.
:param parentTable: the table that is using this data. This is used to get the font metrics of the table
display font.
"""
super(CustomTableModel, self).__init__(parent)
self.parent_table = parentTable
self.auto_resize = False
self._avg_font_w = 5
self._resize_data = defaultdict(int)
self.items = []
self.headers = []
def setParentTable(self, widget):
"""
Sets the parent table widget so that we can get its font metrics for setting our column width with autoResize.
:param widget: TableViewWidget
:raise TypeError:
"""
if not isinstance(widget, QtGui.QTableView):
raise TypeError('Must be a TableView item')
self.parent_table = widget
def setAutoResize(self, b):
"""
Turns on or off auto resize for the table. This gathers the font metrics of the parent table, and then loops
over any current data, or newly added data (including table headers) to get the widest item, and sets the
column width to fit this.
:param b: bool
:raise AttributeError:
"""
if not self.parent_table:
raise AttributeError('You must call setParentTable first to set the parent TableView item')
self.auto_resize = b
if b:
self._autoAllResizeData()
self._doColumnResize()
else:
self._resize_data = dict()
def updateSize(self):
"""
Force the table size to update to the current size data.
"""
self._doColumnResize()
def updateSizeData(self):
"""
Force an update/regathering of all the size data for each row and column.
"""
self._autoAllResizeData(True)
self._doColumnResize()
def _doColumnResize(self):
for i in range(len(self.headers)):
txt = self.headers[i]
self.parent_table.setColumnWidth(i, self._resize_data.get(txt))
def _getKeyList(self):
if self.headers:
return self.headers
elif self.items:
return sorted(self.items[0].keys())
def _getTableFontWidth(self):
self._avg_font_w = self.parent_table.fontMetrics().averageCharWidth()
def _autoAllResizeData(self, reset=False):
if not self._resize_data or reset is True:
self._resize_data = defaultdict(int)
key_list = self._getKeyList()
for header in key_list:
header_width = len(header) * (self._avg_font_w * 1.55)
if header_width > self._resize_data[header]:
self._resize_data[header] = header_width
for item in self.items:
value = item.get(header)
width = len(str(value)) * self._avg_font_w
if width > self._resize_data[header]:
self._resize_data[header] = width
def _autoSingleResizeData(self, data):
key_list = self._getKeyList()
for header in key_list:
value = data.get(header)
if value:
width = len(str(value)) * self._avg_font_w
if width > self._resize_data[header]:
self._resize_data[header] = width
def setHeaders(self, items):
"""
This allows you to set your header item text
:param items: a list of header text, ie ['Name', 'Email', 'Department']
"""
lastCount = self.columnCount(QtCore.QModelIndex())
self.headers = items
self.beginRemoveColumns(QtCore.QModelIndex(), 0, lastCount)
for x in range(lastCount):
self.removeColumn(x)
self.endRemoveColumns()
self.beginInsertColumns(QtCore.QModelIndex(), 0, len(items)-1)
self.endInsertColumns()
def addRow(self, data):
"""
Accepts a dict of data to add to the data model.
:param data: dict (this should match the same key length/names as the other data in the table.)
"""
row = len(self.items)
self.beginInsertRows(QtCore.QModelIndex(), row, row)
self.items.append(data)
self.endInsertRows()
if self.auto_resize:
self._autoSingleResizeData(data)
self._doColumnResize()
def addRows(self, data):
"""
Accepts a list of dicts to add them all to the table, with each list index being a row, and each dict key
a column.
:param data: list of dicts
:raise ValueError:
"""
if not isinstance(data, list) or not isinstance(data[0], dict):
raise ValueError('input must be a list of dicts!')
start_row = len(self.items)
end_row = len(data) + start_row - 1
self.beginInsertRows(QtCore.QModelIndex(), start_row, end_row)
self.items.extend(data)
self.endInsertRows()
if self.auto_resize:
for item in data:
self._autoSingleResizeData(item)
self._doColumnResize()
def removeRow(self, row):
"""
Remove the row at index 'row'.
:param row: int
"""
self.beginRemoveRows(QtCore.QModelIndex(), row, row)
self.items.pop(row)
self.endRemoveRows()
def clear(self):
"""
Clear all table data and start fresh.
"""
rows = self.rowCount(QtCore.QModelIndex())
self.beginRemoveRows(QtCore.QModelIndex(), 0, rows)
self.items = []
self.endRemoveRows()
cols = self.columnCount(QtCore.QModelIndex())
self.beginRemoveColumns(QtCore.QModelIndex(), 0, cols)
self.headers = []
self.endRemoveColumns()
def rowCount(self, QModelIndex):
"""
Return the row count.
:param QModelIndex:
:return:
"""
return len(self.items)
def columnCount(self, QModelIndex):
"""
Return the column count (default 1)
:param QModelIndex:
:return:
"""
try:
return len(self.items[0].keys())
except:
return 1
def data(self, index, role):
"""
Accepts a QModelIndex and a Qt.Role and returns the data at the given modelIndex.
:param index: QModelIndex
:param role: QtCore.Qt.<Role>
:return:
"""
row = index.row()
col = index.column()
if role == QtCore.Qt.DisplayRole:
key_list = self._getKeyList()
return QtCore.QVariant(str(self.items[row][key_list[col]]))
return NullVariant()
def intGetData(self, row, col):
"""
Gets the data at 'row' and 'col'.
:param row: int
:param col: int
:return: QVariant() data.
"""
try:
key_list = self._getKeyList()
return QtCore.QVariant(str(self.items[row][key_list[col]]))
except:
return NullVariant()
def headerData(self, section, orientation, role):
"""
Sets the header data based on our header key list.
:param section: section header
:param orientation: orientation
:param role: Qt<Role>
:return:
"""
if role == QtCore.Qt.DisplayRole:
if orientation == QtCore.Qt.Horizontal:
if not self.items:
if section == 0:
return QtCore.QVariant(str("Column 1"))
else:
key_list = self._getKeyList()
try:
return QtCore.QVariant(str(key_list[section]))
except:
return QtCore.QVariant('No Data')
return NullVariant()
class CustomSortModel(QtGui.QSortFilterProxyModel):
def __init__(self, parent=None):
"""
Custom QSortFilterProxyModel to allow sorting and filtering of our custom data model.
:param parent: parent so that this model is deleted properly upon close.
"""
super(CustomSortModel, self).__init__(parent)
self.countAllColumns = False
self._sortingColumn = 0
def filterAcceptsRow(self, sourceRow, sourceParent):
"""
Overriding how we choose what rows match our input filter text.
:param sourceRow: row index in question
:param sourceParent: QModelIndex
:return: bool (accepted or not)
"""
txt = ''
if self.countAllColumns:
for x in range(len(self.sourceModel().headers)):
txt += self.sourceModel().intGetData(sourceRow, x).toString()
else:
txt = self.sourceModel().intGetData(sourceRow, self._sortingColumn).toString()
if self.filterRegExp().pattern():
b = bool(re.search(str(self.filterRegExp().pattern()), str(txt)))
else:
b = bool(re.search('.*', str(txt)))
return b
def setFilterKeyColumn(self, col):
"""
Sets which column index you want the filter to apply to. -1 or less means we search all columns - otherwise,
the filter rules apply to the column index given.
:param col: signed int
:return:
"""
if col <= -1:
self.countAllColumns = True
return
self.countAllColumns = False
self._sortingColumn = col
super(CustomSortModel, self).setFilterKeyColumn(col)
编辑：当我试图删除这个问题时，我遇到了一个wierd错误，但我添加了一个新的问题，这里有一个更好的测试示例：
https://stackoverflow.com/questions/34074825/pyside-qtableview-not-displaying-text-like-pyqt-does
在PySide中运行代码会出现一堆错误：
AttributeError:"module"对象没有属性"QVariant"
这是因为PySide中已经没有QVariant了。用常规python类型替换所有QVariant可以修复代码。
例如
return QtCore.QVariant('No Data')
成为
return "No Data"