good pyQt5 web

http://blog.youkuaiyun.com/xiaoyangyang20

python3+PyQt5 树中表达表格数据

#!/usr/bin/env python3

import bisect
import codecs
from PyQt5.QtCore import (QAbstractItemModel, QModelIndex,QVariant, Qt)

KEY, NODE = range(2)


class BranchNode(object):

    def __init__(self, name, parent=None):
        super(BranchNode, self).__init__()
        self.name = name
        self.parent = parent
        self.children = []


    def __lt__(self, other):
        if isinstance(other, BranchNode):
            return self.orderKey() < other.orderKey()
        return False


    def orderKey(self):
        return self.name.lower()


    def toString(self):
        return self.name


    def __len__(self):
        return len(self.children)


    def childAtRow(self, row):
        assert 0 <= row < len(self.children)
        return self.children[row][NODE]


    def rowOfChild(self, child):
        for i, item in enumerate(self.children):
            if item[NODE] == child:
                return i
        return -1


    def childWithKey(self, key):
        if not self.children:
            return None
        # Causes a -3 deprecation warning. Solution will be to
        # reimplement bisect_left and provide a key function.
        i = bisect.bisect_left(self.children, (key, None))
        if i < 0 or i >= len(self.children):
            return None
        if self.children[i][KEY] == key:
            return self.children[i][NODE]
        return None


    def insertChild(self, child):
        child.parent = self
        bisect.insort(self.children, (child.orderKey(), child))


    def hasLeaves(self):
        if not self.children:
            return False
        return isinstance(self.children[0], LeafNode)


class LeafNode(object):

    def __init__(self, fields, parent=None):
        super(LeafNode, self).__init__()
        self.parent = parent
        self.fields = fields


    def orderKey(self):
        return "\t".join(self.fields).lower()


    def toString(self, separator="\t"):
        return separator.join(self.fields)


    def __len__(self):
        return len(self.fields)


    def asRecord(self):
        record = []
        branch = self.parent
        while branch is not None:
            record.insert(0, branch.toString())
            branch = branch.parent
        assert record and not record[0]
        record = record[1:]
        return record + self.fields


    def field(self, column):
        assert 0 <= column <= len(self.fields)
        return self.fields[column]


class TreeOfTableModel(QAbstractItemModel):

    def __init__(self, parent=None):
        super(TreeOfTableModel, self).__init__(parent)
        self.columns = 0
        self.root = BranchNode("")
        self.headers = []


    def load(self, filename, nesting, separator):
        self.beginResetModel()
        assert nesting > 0
        self.nesting = nesting
        self.root = BranchNode("")
        exception = None
        fh = None
        try:
            for line in codecs.open(str(filename), "rU", "utf8"):
                if not line:
                    continue
                self.addRecord(line.split(separator), False)
        except IOError as e:
            exception = e
        finally:
            if fh is not None:
                fh.close()
            #self.reset()
            self.endResetModel()
            for i in range(self.columns):
                self.headers.append("Column #{0}".format(i))
            if exception is not None:
                raise exception


    def addRecord(self, fields, callReset=True):
        assert len(fields) > self.nesting
        root = self.root
        branch = None
        for i in range(self.nesting):
            key = fields[i].lower()
            branch = root.childWithKey(key)
            if branch is not None:
                root = branch
            else:
                branch = BranchNode(fields[i])
                root.insertChild(branch)
                root = branch
        assert branch is not None
        items = fields[self.nesting:]
        self.columns = max(self.columns, len(items))
        branch.insertChild(LeafNode(items, branch))
        if callReset:
            self.beginResetModel()
            self.endResetModel()


    def asRecord(self, index):
        leaf = self.nodeFromIndex(index)
        if leaf is not None and isinstance(leaf, LeafNode):
            return leaf.asRecord()
        return []


    def rowCount(self, parent):
        node = self.nodeFromIndex(parent)
        if node is None or isinstance(node, LeafNode):
            return 0
        return len(node)


    def columnCount(self, parent):
        return self.columns


    def data(self, index, role):
        if role == Qt.TextAlignmentRole:
            return QVariant(int(Qt.AlignTop|Qt.AlignLeft))
        if role != Qt.DisplayRole:
            return QVariant()
        node = self.nodeFromIndex(index)
        assert node is not None
        if isinstance(node, BranchNode):
            return node.toString() if index.column() == 0 else ""
        return node.field(index.column())


    def headerData(self, section, orientation, role):
        if (orientation == Qt.Horizontal and
            role == Qt.DisplayRole):
            assert 0 <= section <= len(self.headers)
            return self.headers[section]
        return QVariant()


    def index(self, row, column, parent):
        assert self.root
        branch = self.nodeFromIndex(parent)
        assert branch is not None
        return self.createIndex(row, column,
                                branch.childAtRow(row))


    def parent(self, child):
        node = self.nodeFromIndex(child)
        if node is None:
            return QModelIndex()
        parent = node.parent
        if parent is None:
            return QModelIndex()
        grandparent = parent.parent
        if grandparent is None:
            return QModelIndex()
        row = grandparent.rowOfChild(parent)
        assert row != -1
        return self.createIndex(row, 0, parent)


    def nodeFromIndex(self, index):
        return (index.internalPointer()
                if index.isValid() else self.root)
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/home/yrd/eric_workspace/chap16/serverinfo.pyw

#!/usr/bin/env python3

import os
import sys
from PyQt5.QtCore import (QModelIndex, QVariant, Qt,pyqtSignal)
from PyQt5.QtWidgets import (QApplication, QMainWindow,QMessageBox,  QShortcut, QTreeView)
from PyQt5.QtGui import QKeySequence,QPixmap
import treeoftable


class ServerModel(treeoftable.TreeOfTableModel):

    def __init__(self, parent=None):
        super(ServerModel, self).__init__(parent)


    def data(self, index, role):
        if role == Qt.DecorationRole:
            node = self.nodeFromIndex(index)
            if node is None:
                return QVariant()
            if isinstance(node, treeoftable.BranchNode):
                if index.column() != 0:
                    return QVariant()
                filename = node.toString().replace(" ", "_")
                parent = node.parent.toString()
                if parent and parent != "USA":
                    return QVariant()
                if parent == "USA":
                    filename = "USA_" + filename
                filename = os.path.join(os.path.dirname(__file__),
                                        "flags", filename + ".png")
                pixmap = QPixmap(filename)
                if pixmap.isNull():
                    return QVariant()
                return QVariant(pixmap)
        return treeoftable.TreeOfTableModel.data(self, index, role)


class TreeOfTableWidget(QTreeView):
    activated_signal=pyqtSignal(list)
    def __init__(self, filename, nesting, separator, parent=None):
        super(TreeOfTableWidget, self).__init__(parent)
        self.setSelectionBehavior(QTreeView.SelectItems)
        self.setUniformRowHeights(True)
        model = ServerModel(self)
        self.setModel(model)
        try:
            model.load(filename, nesting, separator)
        except IOError as e:
            QMessageBox.warning(self, "Server Info - Error", str(e))
        self.activated[QModelIndex].connect(self.activate)
        self.expanded.connect(self.expand)
        self.expand()


    def currentFields(self):
        return self.model().asRecord(self.currentIndex())


    def activate(self, index):
        self.activated_signal.emit(self.model().asRecord(index))

    def expand(self):
        for column in range(self.model().columnCount(
                            QModelIndex())):
            self.resizeColumnToContents(column)


class MainForm(QMainWindow):

    def __init__(self, filename, nesting, separator, parent=None):
        super(MainForm, self).__init__(parent)
        headers = ["Country/State (US)/City/Provider", "Server", "IP"]
        if nesting != 3:
            if nesting == 1:
                headers = ["Country/State (US)", "City", "Provider",
                           "Server"]
            elif nesting == 2:
                headers = ["Country/State (US)/City", "Provider",
                           "Server"]
            elif nesting == 4:
                headers = ["Country/State (US)/City/Provider/Server"]
            headers.append("IP")

        self.treeWidget = TreeOfTableWidget(filename, nesting,
                                            separator)
        self.treeWidget.model().headers = headers
        self.setCentralWidget(self.treeWidget)

        QShortcut(QKeySequence("Escape"), self, self.close)
        QShortcut(QKeySequence("Ctrl+Q"), self, self.close)

        self.treeWidget.activated_signal[list].connect(self.activated)

        self.setWindowTitle("Server Info")
        self.statusBar().showMessage("Ready...", 5000)


    def picked(self):
        return self.treeWidget.currentFields()


    def activated(self, fields):
        self.statusBar().showMessage("*".join(fields), 60000)


app = QApplication(sys.argv)
nesting = 3
if len(sys.argv) > 1:
    try:
        nesting = int(sys.argv[1])
    except:
        pass
    if nesting not in (1, 2, 3, 4):
        nesting = 3

form = MainForm(os.path.join(os.path.dirname(__file__), "servers.txt"),
                nesting, "*")
form.resize(750, 550)
form.show()
app.exec_()
print("*".join(form.picked()))
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运行结果：