1 官方帮助文档

QTableWidget 5.15帮助文档
QT 枚举 命名空间

2 常用接口及槽函数使用

#!/usr/bin/env python3 
# -*- coding:GBK -*-
# Author: zero  
import os,sys,re 
from   PyQt5.QtWidgets import *
from   PyQt5.QtCore import  Qt
from   PyQt5.QtGui  import QBrush

class QTableWidgetDemo(QWidget):
    def __init__(self):
        super(QTableWidgetDemo, self).__init__()
        self.setWindowTitle("QTableWidgetDemo")
        self.resize( 600,500 )
        self.mainlayout = QVBoxLayout(self)
        #创建表格 5行,4列
        self.tablewidget = QTableWidget(5,4,self)
        self.mainlayout.addWidget(self.tablewidget)
        #获得行数和列数
        row = self.tablewidget.rowCount()
        col = self.tablewidget.columnCount()
        print("row: ", row, " col: ",col )
        #设置行数 列数
        self.tablewidget.setColumnCount(4)
        self.tablewidget.setRowCount(5)
        #插入 删除 行 
        self.tablewidget.insertRow(5)
        self.tablewidget.removeRow(5)
        #插入 删除 列
        self.tablewidget.insertColumn(4)
        self.tablewidget.removeColumn(4)
        #设置水平表头
        self.tablewidget.setHorizontalHeaderLabels(["第1列","第2列","第3列","第4列"])
        #设置垂直表头
        self.tablewidget.setVerticalHeaderLabels(["第1行","第2行","第3行","第4行","第5行"])
        # 隐藏垂直表头
        self.tablewidget.verticalHeader().hide()
        # 隐藏水平表头
        #self.tablewidget.horizontalHeader().hide()
        #设置行高  列宽
        self.tablewidget.setRowHeight(0,50)
        self.tablewidget.setColumnWidth(0, 100)

        # 设置表格项
        for row in range(5):
           for col in range(4): 
            item =  QTableWidgetItem("第%d行 %d列"%(row,col))
            self.tablewidget.setItem( row, col , item)
        # 清除表格内容和表头
        #self.tablewidget.clear()
        # 清除表格内容
        #self.tablewidget.clearContents()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    test = QTableWidgetDemo()
    test.show()
    sys.exit(app.exec_())

如下：

3 常用信号使用

#!/usr/bin/env python3 
# -*- coding:GBK -*-
# Author: zero  
import os,sys,re 
from   PyQt5.QtWidgets import *
from   PyQt5.QtCore import  Qt
from   PyQt5.QtGui  import  QBrush


'''
void	currentCellChanged(int currentRow, int currentColumn, int previousRow, int previousColumn)
void	currentItemChanged(QTableWidgetItem *current, QTableWidgetItem *previous)
void	itemActivated(QTableWidgetItem *item)
void	itemChanged(QTableWidgetItem *item)
void	itemClicked(QTableWidgetItem *item)
void	itemDoubleClicked(QTableWidgetItem *item)
void	itemEntered(QTableWidgetItem *item)
void	itemPressed(QTableWidgetItem *item)
void	itemSelectionChanged()
'''

class QTableWidgetDemo(QWidget):
    def __init__(self):
        super(QTableWidgetDemo, self).__init__()
        self.setWindowTitle("QTableWidgetDemo")
        self.resize( 600,500 )
        self.mainlayout = QVBoxLayout(self)
        #创建表格 5行,4列
        self.tablewidget = QTableWidget(5,4,self)
        self.mainlayout.addWidget(self.tablewidget)
        # 设置水平表头
        self.tablewidget.setHorizontalHeaderLabels(["第1列","第2列","第3列","第4列"])
        # 隐藏垂直表头
        self.tablewidget.verticalHeader().hide()
        # 宽度适应
        self.tablewidget.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
        # 表头颜色
        self.tablewidget.horizontalHeader().setStyleSheet("QHeaderView::section{background:lightgreen;}")
        # 设置表格项
        for row in range(5):
            for col in range(4): 
                item =  QTableWidgetItem("第%d行 %d列"%(row,col)) 
                self.tablewidget.setItem( row, col , item)
        #常用的信号 setBackground(QBrush(Qt.white))
        self.setMouseTracking(True)

        # item 被点击 设置背景红色
        self.tablewidget.itemClicked.connect(self.slot_itemClicked)
        # item 被双击 设置背景绿色
        self.tablewidget.itemDoubleClicked.connect(self.slot_itemDoubleClicked)
        # item 进入  设置背景黄
        self.tablewidget.itemEntered.connect(self.slot_itemEntered)
        # press 
        self.tablewidget.itemPressed.connect(self.slot_itemPressed)


    def  slot_itemClicked(self,item ):
        item.setBackground(QBrush(Qt.red)) 

    def  slot_itemDoubleClicked(self, item):
        item.setBackground(QBrush(Qt.green))  

    def  slot_itemEntered(self, item):
        item.setBackground(QBrush(Qt.yellow))  

    def  slot_itemPressed(self, item):
        item.setBackground(QBrush(Qt.gray))  

if __name__ == "__main__":
    app = QApplication(sys.argv)
    test = QTableWidgetDemo()
    test.show()
    sys.exit(app.exec_())

效果如下（对应玩几下）：

4 tips

1 表格自适应宽度

# 1 整个表格
# self.tablewidget.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
#  2 单独某一列  col_index
# self.tablewidget.horizontalHeader().setSectionResizeMode( col_index, QHeaderView.Stretch)

2 设置表格项不可编辑等属性

#表格项不可编辑等属性
item.setFlags(Qt.ItemIsEnabled)

3 设置背景色交替

self.tablewidget.setAlternatingRowColors(True)
self.tablewidget.setStyleSheet("alternate-background-color: lightyellow; background-color: white ;")