1
我该如何提高这个python工具的速度。当用户键入说明或名称输入，它会减慢程序，同时更新QTreeView第二列中的项目列表。它似乎不应该是一个过程的征税。如何在更新行时提高QTreeView的速度？
为什么我更快地重新创建项目的整个列表，而不是更新每行第二列中的文本？
我注意到它是更快地做到这一点：
# self.uiAssetName.textChanged.connect(self.generate_names)
# self.uiAssetDescription.textChanged.connect(self.generate_names)
self.uiAssetName.textChanged.connect(self.generate_assets)
self.uiAssetDescription.textChanged.connect(self.generate_assets)
# Simple rename tool using QTreeView, pass data object into treeview
from __future__ import print_function
# Modules
import sys
import random
from PySide import QtGui, QtCore
AssetClasses = {
"Label A": "AA",
"Label B": "BB",
"Label C": "CC",
"Label D": "DD",
"Label E": "EE",
"Label F": "FF",
"Label G": "GG",
"Label H": "HH"
}
class Asset(object):
def __init__(self, name=''):
self.name = name
self.newname = ''
class PSRenamer(QtGui.QMainWindow):
def __init__(self):
super(PSRenamer, self).__init__()
# ui
self.setWindowTitle(self.tr("Renamer"))
self.setMinimumWidth(450)
self.setMinimumHeight(500)
# create widgets
lbAssetClass = QtGui.QLabel("Class")
self.uiAssetClass = QtGui.QComboBox()
lbAssetName = QtGui.QLabel("Name")
self.uiAssetName = QtGui.QLineEdit()
self.uiAssetName.setPlaceholderText('Name...')
lbAssetDescription = QtGui.QLabel("Description")
self.uiAssetDescription = QtGui.QLineEdit()
self.uiAssetDescription.setPlaceholderText('Description...')
# treeview
self._model = QtGui.QStandardItemModel()
self.ui_items = QtGui.QTreeView()
self.ui_items.setAlternatingRowColors(True)
self.ui_items = QtGui.QTreeView()
self.ui_items.setAlternatingRowColors(True)
self.ui_items.setModel(self._model)
self.ui_items.setSortingEnabled(True)
self.ui_items.sortByColumn(0, QtCore.Qt.AscendingOrder)
self.ui_items.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
self.ui_items.setSelectionMode(QtGui.QAbstractItemView.NoSelection)
self.ui_items.setFocusPolicy(QtCore.Qt.NoFocus)
self.ui_items.header().setResizeMode(QtGui.QHeaderView.ResizeToContents)
self.ui_items.header().setStretchLastSection(False)
self.uiGenerateAssets = QtGui.QPushButton("Generate")
self.uiRunRenamer = QtGui.QPushButton("Apply")
# layout: controls
gdl = QtGui.QGridLayout()
gdl.setContentsMargins(10, 5, 10, 5)
gdl.addWidget(lbAssetClass, 0, 0)
gdl.addWidget(self.uiAssetClass, 0, 1)
gdl.addWidget(lbAssetName, 1, 0)
gdl.addWidget(self.uiAssetName, 1, 1)
gdl.addWidget(lbAssetDescription, 2, 0)
gdl.addWidget(self.uiAssetDescription, 2, 1)
gdl.addWidget(self.ui_items, 3, 0, 1, 2)
gdl.addWidget(self.uiGenerateAssets, 4, 0, 1, 1)
gdl.addWidget(self.uiRunRenamer, 4, 1, 1, 1)
# main layout
main_widget = QtGui.QWidget()
main_widget.setLayout(gdl)
self.setCentralWidget(main_widget)
for c in AssetClasses:
self.uiAssetClass.addItem(c, AssetClasses[c])
self.uiAssetClass.currentIndexChanged.connect(self.generate_names)
self.uiAssetClass.setCurrentIndex(6)
# actions
self.uiAssetName.textChanged.connect(self.generate_names)
self.uiAssetDescription.textChanged.connect(self.generate_names)
self.uiRunRenamer.clicked.connect(self.setNewNames)
self.uiGenerateAssets.clicked.connect(self.generateAssets)
self.generateAssets()
def generateAssets(self):
print("generate new assets")
items = [
'Football', 'Steve', 'Basketball', 'Grag', 'Badminton', 'Boris', 'Red Lamp', 'Ann', 'PinSpot', 'Diana', 'Soccer', 'Jogn', 'Ferrari', 'Aziz', 'Train', 'Asef', 'Cat', 'Arnold', 'IceHockey', 'Dimitras', 'Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California', 'Colorado', 'Connecticut', 'Delaware', 'District of Columbia', 'Florida', 'Georgia', 'Hawaii', 'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana', 'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota', 'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire', 'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota', 'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island', 'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont', 'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming', 'Afghanistan', 'Albania', 'Algeria', 'American Samoa', 'Andorra', 'Angola', 'Anguilla', 'Antarctica', 'Antigua and Barbuda', 'Argentina', 'Armenia', 'Aruba', 'Australia', 'Austria', 'Azerbaijan', 'Bahamas', 'Bahrain', 'Bangladesh', 'Barbados', 'Belarus', 'Belgium', 'Belize', 'Benin', 'Bermuda', 'Bhutan', 'Bolivia', 'Bosnia and Herzegovina', 'Botswana', 'Bouvet Island', 'Brazil', 'British Indian Ocean Territory', 'Brunei Darussalam', 'Bulgaria', 'Burkina Faso', 'Burundi', 'Cambodia', 'Cameroon', 'Canada', 'Cape Verde', 'Cayman Islands', 'Central African Republic', 'Chad', 'Chile', 'China', 'Christmas Island', 'Cocos (Keeling) Islands', 'Colombia', 'Comoros', 'Congo', 'Congo', 'The Democratic Republic of The', 'Cook Islands', 'Costa Rica', 'Cote Divoire', 'Croatia', 'Cuba', 'Cyprus', 'Czech Republic', 'Denmark', 'Djibouti', 'Dominica', 'Dominican Republic', 'Ecuador', 'Egypt', 'El Salvador', 'Equatorial Guinea', 'Eritrea', 'Estonia', 'Ethiopia', 'Falkland Islands (Malvinas)', 'Faroe Islands', 'Fiji', 'Finland', 'France', 'French Guiana', 'French Polynesia', 'French Southern Territories', 'Gabon', 'Gambia', 'Georgia', 'Germany', 'Ghana', 'Gibraltar', 'Greece', 'Greenland', 'Grenada', 'Guadeloupe', 'Guam', 'Guatemala', 'Guinea', 'Guinea-bissau', 'Guyana', 'Haiti', 'Heard Island and Mcdonald Islands', 'Holy See (Vatican City State)', 'Honduras', 'Hong Kong', 'Hungary', 'Iceland', 'India', 'Indonesia', 'Iran', 'Islamic Republic of', 'Iraq', 'Ireland', 'Israel', 'Italy', 'Jamaica', 'Japan', 'Jordan', 'Kazakhstan', 'Kenya', 'Kiribati', 'Korea', 'Democratic Peoples Republic of', 'Korea', 'Republic of', 'Kuwait', 'Kyrgyzstan', 'Lao Peoples Democratic Republic', 'Latvia', 'Lebanon', 'Lesotho', 'Liberia', 'Libyan Arab Jamahiriya', 'Liechtenstein', 'Lithuania', 'Luxembourg', 'Macao', 'Macedonia', 'The Former Yugoslav Republic of', 'Madagascar', 'Malawi', 'Malaysia', 'Maldives', 'Mali', 'Malta', 'Marshall Islands', 'Martinique', 'Mauritania', 'Mauritius', 'Mayotte', 'Mexico', 'Micronesia', 'Federated States of', 'Moldova', 'Republic of', 'Monaco', 'Mongolia', 'Montserrat', 'Morocco', 'Mozambique', 'Myanmar', 'Namibia', 'Nauru', 'Nepal', 'Netherlands', 'Netherlands Antilles', 'New Caledonia', 'New Zealand', 'Nicaragua', 'Niger', 'Nigeria', 'Niue', 'Norfolk Island', 'Northern Mariana Islands', 'Norway', 'Oman', 'Pakistan', 'Palau', 'Palestinian Territory', 'Occupied', 'Panama', 'Papua New Guinea', 'Paraguay', 'Peru', 'Philippines', 'Pitcairn', 'Poland', 'Portugal', 'Puerto Rico', 'Qatar', 'Reunion', 'Romania', 'Russian Federation', 'Rwanda', 'Saint Helena', 'Saint Kitts and Nevis', 'Saint Lucia', 'Saint Pierre and Miquelon', 'Saint Vincent and The Grenadines', 'Samoa', 'San Marino', 'Sao Tome and Principe', 'Saudi Arabia', 'Senegal', 'Serbia and Montenegro', 'Seychelles', 'Sierra Leone', 'Singapore', 'Slovakia', 'Slovenia', 'Solomon Islands', 'Somalia', 'South Africa', 'South Georgia and The South Sandwich Islands', 'Spain', 'Sri Lanka', 'Sudan', 'Suriname', 'Svalbard and Jan Mayen', 'Swaziland', 'Sweden', 'Switzerland', 'Syrian Arab Republic', 'Taiwan', 'Province of China', 'Tajikistan', 'Tanzania', 'United Republic of', 'Thailand', 'Timor-leste', 'Togo', 'Tokelau', 'Tonga', 'Trinidad and Tobago', 'Tunisia', 'Turkey', 'Turkmenistan', 'Turks and Caicos Islands', 'Tuvalu', 'Uganda', 'Ukraine', 'United Arab Emirates', 'United Kingdom', 'United States', 'United States Minor Outlying Islands', 'Uruguay', 'Uzbekistan', 'Vanuatu', 'Venezuela', 'Viet Nam', 'Virgin Islands', 'British', 'Virgin Islands', 'U.S.', 'Wallis and Futuna', 'Western Sahara', 'Yemen', 'Zambia', 'Zimbabwe'
]
model = self.ui_items.model()
model.clear()
columns = ["Name","New Name"]
model.setHorizontalHeaderLabels(columns)
random.seed()
for name in random.sample(items, random.randint(1, len(items))):
obj = Asset(name)
model.insertRow(0)
model.setData(model.index(0, 0), obj.name)
model.setData(model.index(0, 1), obj.newname)
# Append peson data
model.setData(model.index(0, 0), obj, role=QtCore.Qt.UserRole)
model.setData(model.index(0, 1),
QtGui.QBrush(QtGui.QColor(50, 80, 190, 255)),
QtCore.Qt.ForegroundRole)
self.generate_names()
def setNewNames(self):
print("apply new names")
model = self.ui_items.model()
for i in range(model.rowCount()):
sidx = model.index(i, 1,
parent=QtCore.QModelIndex())
didx = model.index(i, 0,
parent=QtCore.QModelIndex())
if sidx.isValid() and didx.isValid():
model.setData(didx, sidx.data())
data = didx.data(role=QtCore.Qt.UserRole)
if isinstance(data, Person):
print(i + 1, data)
def generate_names(self):
index = self.uiAssetClass.currentIndex()
assetCode = str(self.uiAssetClass.itemData(index))
items = [assetCode, self.uiAssetName.text(),
self.uiAssetDescription.text()]
items = list(filter(lambda x: x, items))
name_template = '_'.join(items)
print('NT: {}'.format(name_template))
self.set_new_names(name_template)
def set_new_names(self, template):
model = self.ui_items.model()
names = {}
for i in range(model.rowCount()):
if template not in names:
names[template] = []
names[template].append(model.index(i, 1,
parent=QtCore.QModelIndex()))
# Set names
for tmpl, items in names.items():
for idx, item in enumerate(items):
if item.isValid():
suffix = '_{:03d}'.format(idx+1)
if len(items) == 1:
suffix = ''
model.setData(item, '{}{}'.format(tmpl, suffix))
# Main
# -----------------------------------------------------------------------------
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
window = PSRenamer()
window.show()
app.exec_()