python - 在 Python 中:一次将 QtableWidget 中的所有条目插入数据库表
问题描述
想知道是否有人知道如何使用 python 将 qtablewidget 的所有条目插入数据库。到目前为止,我发现了这个编码:
# Creating a query for later execution using .prepare()
insertDataQuery = QSqlQuery()
insertDataQuery.prepare(
"""
INSERT INTO contacts (
name,
job,
email
)
VALUES (?, ?, ?)
"""
)
# Sample data
data = [
("Joe", "Senior Web Developer", "joe@example.com"),
("Lara", "Project Manager", "lara@example.com"),
("David", "Data Analyst", "david@example.com"),
("Jane", "Senior Python Developer", "jane@example.com"),
]
# Use .addBindValue() to insert data
for name, job, email in data:
insertDataQuery.addBindValue(name)
insertDataQuery.addBindValue(job)
insertDataQuery.addBindValue(email)
insertDataQuery.exec()
我被困在将 qtablewidget 的条目分配给数据
解决方案
您可以使用以下方法:
# Ignore lazy imports
import sys
from typing import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtSql import *
from PyQt5.QtWidgets import *
首先,让我们创建一个函数,该函数QTableWidget
使用您提供的数据返回 a:
def createTable() -> QTableWidget:
"""Let's create a QTableWidget with the data you provided."""
data = [
("Joe", "Senior Web Developer", "joe@example.com"),
("Lara", "Project Manager", "lara@example.com"),
("David", "Data Analyst", "david@example.com"),
("Jane", "Senior Python Developer", "jane@example.com"),
]
table = QTableWidget()
table.setRowCount(len(data))
table.setColumnCount(len(data[0]))
for i, row in enumerate(data):
for j, val in enumerate(row):
table.setItem(i, j, QTableWidgetItem(val))
return table
现在我们创建一个函数来从表中获取数据并以相同的格式返回它:
def getData(table: QTableWidget) -> List[Tuple[str]]:
"""Fetch the data from the QTableWidget and return it as `data`."""
data = []
for row in range(table.rowCount()):
rowData = []
for col in range(table.columnCount()):
rowData.append(table.item(row, col).data(Qt.EditRole))
data.append(tuple(rowData))
return data
对于 db insert 部分,我们可以重用您提供的代码:
def insertData(data: List[Tuple[str]]) -> None:
"""Creating a query for later execution using .prepare()"""
insertDataQuery = QSqlQuery()
insertDataQuery.prepare(
"""
INSERT INTO contacts (
name,
job,
email
)
VALUES (?, ?, ?)
"""
)
# Use .addBindValue() to insert data
for name, job, email in data:
insertDataQuery.addBindValue(name)
insertDataQuery.addBindValue(job)
insertDataQuery.addBindValue(email)
insertDataQuery.exec_()
# Note that you need to run `QSqlDatabase().commit()`` if you want the data to be committed in the database.
现在把它们放在一起:
app = QApplication([sys.argv])
# Connect to sample database
sampleDb = QSqlDatabase.addDatabase("QSQLITE")
sampleDb.setDatabaseName("sample.sqlite")
sampleDb.open()
# Create table with sample data
table = createTable()
# Get data from table
data = getData(table)
# Insert data into the database
insertData(data)
sys.exit(app.exec_())
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