如何按最高数字对pyqt中的coloumn进行排序？目前我有setSortingEnabled(True)并且只按最大数量（例如1,1,1,1,2,2,2,3,3）对其进行排序，我希望以最高数字为例进行排序（例如例如58,25,15,10）。谢谢！
数据更新：
def setmydata(self):
for n, key in enumerate(self.data):
for m, item in enumerate(self.data[key]):
newitem = QtGui.QTableWidgetItem(item)
self.setItem(m, n, newitem)
整个代码：
import sys
from PyQt4.QtGui import QTableWidget
from PyQt4 import QtGui,QtCore,Qt
import MySQLdb as mdb
from functools import partial
import time
class Window(QtGui.QDialog):
process_column_signal = QtCore.pyqtSignal()
def __init__(self,parent=None):
super(Window, self).__init__()
self.layout = QtGui.QVBoxLayout(self)
self.db = mdb.connect('serv','user','pass','db')
self.model = self.db.cursor()
self.initialData = self.get_data_status()
self.table1 = MyTableStatus(self.initialData, 145, 4)
callback = partial(self.process_column,self.table1)
self.process_column_signal.connect(callback)
self.layout.addWidget(self.table1)
self.timer_status = QtCore.QTimer()
self.timer_status.timeout.connect(self.updateAllViews)
self.timer_status.timeout.connect(self.some_method)
# check every half-second
self.timer_status.start(1000*5)
def some_method(self):
self.process_column_signal.emit()
def get_data_status(self):
self.model.execute("""SELECT cpu_juliet,cpu,cpu_julietleft FROM status
WHERE date = (SELECT MAX(date) FROM status)""")
rows_status_cpu = self.model.fetchone()
self.listb1 = ['%s' % rows_status_cpu[0],'%s' % rows_status_cpu[2],'%s' % rows_status_cpu[1],'%s' % rows_status_cpu[1]]#['%s %s' % self.rows_status]
self.model.execute("""SELECT disk_queue_juliet FROM status
WHERE date = (SELECT MAX(date) FROM status)""")
rows_status_disk_queue = self.model.fetchone()
self.lista1 = 'Juliet','Julietleft','Pong','Hulk'
self.listc1 = ['%s' % rows_status_disk_queue,'%s' % rows_status_disk_queue,'%s' % rows_status_disk_queue,'%s' % rows_status_disk_queue ]
if self.listb1[0] >= '80' or self.listc1[0] >= '9':
server_status_Juliet = 'WARNING'
else:
server_status_Juliet = 'Normal'
if self.listb1[1] >= '80' or self.listc1[1] >= '9':
server_status_Julietleft = 'WARNING'
else:
server_status_Julietleft = 'Normal'
if self.listb1[2] >= '80' or self.listc1[2] >= '9':
server_status_Pong = 'WARNING'
else:
server_status_Pong = 'Normal'
if self.listb1[3] >= '80' or self.listc1[3] >= '9':
server_status_Hulk = 'WARNING'
else:
server_status_Hulk = 'Normal'
self.listd1 = ['%s' % server_status_Juliet,'%s' % server_status_Julietleft,'%s' % server_status_Pong,'%s' % server_status_Hulk]
# if server_status_Hulk == "WARNING": #or server_status_Pong == "WARNING" or server_status_Julietleft == "WARNING" or server_status_Juliet == "WARNING":
# self.serverstatus.setStyleSheet("QTabWidget {color: red}")
#status label conditions
self.mystruct1 = {'A':self.lista1, 'B':self.listb1, 'C':self.listc1, 'D':self.listd1}
return self.mystruct1
def updateAllViews(self):
_ = self.get_data_status()
self.updateTable()
def updateTable(self):
self.table1.updateFromDict(self.mystruct1)
def process_column(table1, processCol=1):
colCount = table1.table1.rowCount()
for row in xrange(table1.table1.rowCount()):
for col in xrange(4):
try:
item = table1.table1.item(row, 3)
text = item.text()
if (float(text) >= 20.0 ):
for col in xrange(colCount):
print row
item = table1.table1.item(row,col)
item.setBackground(QtGui.QBrush(QtCore.Qt.yellow))
except:
pass
class MyTableStatus(QTableWidget):
def __init__(self, thestruct, *args):
QTableWidget.__init__(self, *args)
self.setSizePolicy(QtGui.QSizePolicy.Fixed, QtGui.QSizePolicy.Preferred)
self.setHorizontalHeaderLabels(['Server', 'Avg. Disk Queue','CPU Load',"Status"])
self.setSortingEnabled(False)
self.data = {}
self.setmydata()
def updateFromDict(self, aDict):
self.data.clear()
self.data.update(aDict)
self.setmydata()
def setmydata(self):
for n, key in enumerate(self.data):
for m, item in enumerate(self.data[key]):
newitem = QtGui.QTableWidgetItem(item)
self.setItem(m, n, newitem)
def main():
app = QtGui.QApplication(sys.argv)
app.setStyle(QtGui.QStyleFactory.create("plastique"))
main_window = Window()
main_window.repaint()
main_window.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
答案 0 :(得分：8)
按字母顺序排序（因此，就字符串而言，'1'，'10'，'11'，'12'，'2'，'20'，'21'，'22'，'3 '，'4'等是正确的排序顺序。看来对于QTableWidgetItem，如果你使用setData（Qt.EditRole，value）方法，排序顺序将起作用。取决于你的Qt版本（我假设）您可能必须重载表小部件项的less方法。
from PyQt4.QtCore import Qt, QVariant
from PyQt4.QtGui import QApplication, QTableWidget, QTableWidgetItem
class MyTableWidgetItem(QTableWidgetItem):
def __lt__(self, other):
if ( isinstance(other, QTableWidgetItem) ):
my_value, my_ok = self.data(Qt.EditRole).toInt()
other_value, other_ok = other.data(Qt.EditRole).toInt()
if ( my_ok and other_ok ):
return my_value < other_value
return super(MyTableWidgetItem, self).__lt__(other)
if ( __name__ == '__main__' ):
app = None
if ( QApplication.instance() is None ):
app = QApplication([])
widget = QTableWidget()
widget.setWindowFlags(Qt.Dialog)
widget.setSortingEnabled(True)
widget.setRowCount(50)
widget.setColumnCount(3)
for row in range(50):
# create a normal QTableWidgetItem
a = QTableWidgetItem()
a.setText(str(row))
widget.setItem(row, 0, a)
# create a proper sorted item
b = QTableWidgetItem()
b.setData(Qt.EditRole, QVariant(row))
widget.setItem(row, 1, b)
# create a custom sorted item
c = MyTableWidgetItem()
c.setData(Qt.EditRole, QVariant(row))
widget.setItem(row, 2, c)
widget.show()
if ( app ):
app.exec_()
答案 1 :(得分：2)
使用自定义Item的替代方法是使用SortFilterProxy（您可能应该这样做）。在这种情况下，您可以定义将用于排序的lessThan方法。这是我的：
class SortFilterProxyModel(QSortFilterProxyModel):
def lessThan(self, left_index, right_index):
left_var = left_index.data(Qt.EditRole)
right_var = right_index.data(Qt.EditRole)
try:
return float(left_var) < float(right_var)
except (ValueError, TypeError):
pass
return left_var < right_var
它使用EditRole来获取用于排序的数据，因此您可以在DisplayRole个案例中执行您想要执行的任何可用性映射。它也只是尝试对值进行数值排序，而不是转换为float，否则进行本机排序。不是最通用的方法，但似乎对我有用。 YMMV。
答案 2 :(得分：0)
对数字进行排序的另一种可能的解决方案是，添加特殊属性并根据该值进行比较。 Mybe是一种更像Java的方式。
class MyTableWidgetItem(QTableWidgetItem):
def __init__(self, value):
QTableWidgetItem.__init__(self)
self.value = value
def __lt__(self, other):
if isinstance(other, MyTableWidgetItem):
return self.value < other.value
return super(QTableWidgetItem, self).__lt__(other)
答案 3 :(得分：-1)
更简单的方法是在数字文本前加上一些空格。 ''的ascii值小于'0'，因此它可以按您的意愿工作。这是我的工作：
element = str(num) # convert to str
padded = (' '+element)[-5:] # make all elements the same length
item.setText(padded)