Here is my python code, any suggestions for improvements? It is a data editor similar to one in SPSS that handles with time series data only. "import sys
import csv
from PySide6.QtWidgets import (
    QApplication, QMainWindow, QWidget, QTableWidget, QTableWidgetItem,
    QVBoxLayout, QHBoxLayout, QSplitter, QFileDialog, QDialog,
    QLabel, QLineEdit, QPushButton, QMessageBox, QComboBox, QToolBar)
from PySide6.QtGui import QIcon, QAction
from PySide6.QtCore import Qt, Slot, QSize

class VariableDialog(QDialog):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setWindowTitle("Variable Properties")
        self.layout = QVBoxLayout()

        self.name_label = QLabel("Variable Name:")
        self.name_edit = QLineEdit()
        self.type_label = QLabel("Data Type:")
        self.type_combo = QComboBox()
        self.type_combo.addItems(["String", "Integer", "Float", "Date", "Boolean"])

        self.ok_button = QPushButton("OK")
        self.cancel_button = QPushButton("Cancel")

        self.layout.addWidget(self.name_label)
        self.layout.addWidget(self.name_edit)
        self.layout.addWidget(self.type_label)
        self.layout.addWidget(self.type_combo)

        self.button_layout = QHBoxLayout()
        self.button_layout.addWidget(self.ok_button)
        self.button_layout.addWidget(self.cancel_button)

        self.layout.addLayout(self.button_layout)
        self.setLayout(self.layout)

        self.ok_button.clicked.connect(self.accept)
        self.cancel_button.clicked.connect(self.reject)

    def getData(self):
        return self.name_edit.text(), self.type_combo.currentText()

class VariableView(QTableWidget):
    def __init__(self, parent=None):
        super().__init__(0, 2, parent)
        self.setHorizontalHeaderLabels(["Variable Name", "Data Type"])
        self.verticalHeader().setVisible(False)
        self.cellDoubleClicked.connect(self.editVariable)

    def addVariable(self, name, data_type):
        row = self.rowCount()
        self.insertRow(row)
        self.setItem(row, 0, QTableWidgetItem(name))
        self.setItem(row, 1, QTableWidgetItem(data_type))

    def editVariable(self, row, column):
        name_item = self.item(row, 0)
        type_item = self.item(row, 1)

        dialog = VariableDialog(self)
        dialog.name_edit.setText(name_item.text())
        dialog.type_combo.setCurrentText(type_item.text())

        if dialog.exec():
            name, data_type = dialog.getData()
            if name.strip() == "":
                QMessageBox.warning(self, "Invalid Name", "Variable name cannot be empty.")
                return
            # Check for duplicate names
            for i in range(self.rowCount()):
                if i != row and self.item(i, 0).text() == name:
                    QMessageBox.warning(self, "Duplicate Name", "Variable name must be unique.")
                    return
            name_item.setText(name)
            type_item.setText(data_type)
            self.parent().data_table.updateColumnType(row, data_type)

    def deleteVariable(self, row):
        self.removeRow(row)

class DataTable(QTableWidget):
    def __init__(self, variable_view, parent=None):
        super().__init__(0, 0, parent)
        self.variable_view = variable_view

    def addVariable(self, name, data_type):
        col = self.columnCount()
        self.insertColumn(col)
        self.setHorizontalHeaderItem(col, QTableWidgetItem(name))
        self.adjustDataToType(col, data_type)

    def deleteVariable(self, col):
        self.removeColumn(col)

    def addRow(self):
        row = self.rowCount()
        self.insertRow(row)

    def deleteRow(self, row):
        self.removeRow(row)

    def updateColumnType(self, col, data_type):
        self.adjustDataToType(col, data_type)

    def adjustDataToType(self, col, data_type):
        for row in range(self.rowCount()):
            item = self.item(row, col)
            if item is None:
                continue
            value = item.text()
            if data_type == "Integer":
                try:
                    int(value)
                except ValueError:
                    self.setItem(row, col, QTableWidgetItem(""))
            elif data_type == "Float":
                try:
                    float(value)
                except ValueError:
                    self.setItem(row, col, QTableWidgetItem(""))
            elif data_type == "Boolean":
                item.setText("True" if value.lower() in ("true", "1", "yes") else "False")
            elif data_type == "Date":
                # Add date parsing logic here
                pass
            # Handle other types as needed

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Data Entry Editor")

        # Create the variable and data views
        self.variable_view = VariableView()
        self.data_table = DataTable(self.variable_view)

        # Set parent references
        self.variable_view.parent = self
        self.data_table.parent = self

        # Create splitters
        splitter = QSplitter(Qt.Horizontal)
        splitter.addWidget(self.variable_view)
        splitter.addWidget(self.data_table)

        # Main widget and layout
        main_widget = QWidget()
        main_layout = QVBoxLayout()
        main_layout.addWidget(splitter)
        main_widget.setLayout(main_layout)
        self.setCentralWidget(main_widget)

        # Create the ribbon toolbar
        self.createRibbon()

    def createRibbon(self):
        toolbar = QToolBar("Ribbon")
        toolbar.setIconSize(QSize(16, 16))
        self.addToolBar(toolbar)

        # New Action
        new_act = QAction(QIcon.fromTheme("document-new"), "&New", self)
        new_act.triggered.connect(self.newFile)
        toolbar.addAction(new_act)

        # Open Action
        open_act = QAction(QIcon.fromTheme("document-open"), "&Open", self)
        open_act.triggered.connect(self.openFile)
        toolbar.addAction(open_act)

        # Save Action
        save_act = QAction(QIcon.fromTheme("document-save"), "&Save", self)
        save_act.triggered.connect(self.saveFile)
        toolbar.addAction(save_act)

        toolbar.addSeparator()

        # Add Variable Action
        add_var_act = QAction(QIcon.fromTheme("list-add"), "Add &Variable", self)
        add_var_act.triggered.connect(self.addVariable)
        toolbar.addAction(add_var_act)

        # Delete Variable Action
        del_var_act = QAction(QIcon.fromTheme("list-remove"), "Delete Variable", self)
        del_var_act.triggered.connect(self.deleteVariable)
        toolbar.addAction(del_var_act)

        # Add Row Action
        add_row_act = QAction(QIcon.fromTheme("insert-row"), "Add &Row", self)
        add_row_act.triggered.connect(self.addRow)
        toolbar.addAction(add_row_act)

        # Delete Row Action
        del_row_act = QAction(QIcon.fromTheme("delete-row"), "Delete Row", self)
        del_row_act.triggered.connect(self.deleteRow)
        toolbar.addAction(del_row_act)

    @Slot()
    def newFile(self):
        # Clear the variable view and data table
        self.variable_view.setRowCount(0)
        self.data_table.setColumnCount(0)
        self.data_table.setRowCount(0)

    @Slot()
    def openFile(self):
        file_name, _ = QFileDialog.getOpenFileName(self, "Open CSV", "", "CSV Files (.csv)")
        if file_name:
            self.loadCSV(file_name)

    @Slot()
    def saveFile(self):
        file_name, _ = QFileDialog.getSaveFileName(self, "Save CSV", "", "CSV Files (.csv)")
        if file_name:
            self.saveCSV(file_name)

    def loadCSV(self, file_name):
        with open(file_name, 'r', newline='', encoding='utf-8') as csvfile:
            reader = csv.reader(csvfile)
            headers = next(reader)
            types = next(reader)

            # Clear current data
            self.variable_view.setRowCount(0)
            self.data_table.setColumnCount(0)
            self.data_table.setRowCount(0)

            # Set up variables
            for name, data_type in zip(headers, types):
                self.variable_view.addVariable(name, data_type)
                self.data_table.addVariable(name, data_type)

            # Load data rows
            for row_data in reader:
                row = self.data_table.rowCount()
                self.data_table.insertRow(row)
                for col, data in enumerate(row_data):
                    item = QTableWidgetItem(data)
                    self.data_table.setItem(row, col, item)

    def saveCSV(self, file_name):
        headers = [self.variable_view.item(row, 0).text() for row in range(self.variable_view.rowCount())]
        types = [self.variable_view.item(row, 1).text() for row in range(self.variable_view.rowCount())]

        with open(file_name, 'w', newline='', encoding='utf-8') as csvfile:
            writer = csv.writer(csvfile)
            writer.writerow(headers)
            writer.writerow(types)

            for row in range(self.data_table.rowCount()):
                row_data = []
                for col in range(self.data_table.columnCount()):
                    item = self.data_table.item(row, col)
                    row_data.append(item.text() if item else '')
                writer.writerow(row_data)

    @Slot()
    def addVariable(self):
        dialog = VariableDialog(self)
        if dialog.exec():
            name, data_type = dialog.getData()
            if name.strip() == "":
                QMessageBox.warning(self, "Invalid Name", "Variable name cannot be empty.")
                return
            # Check for duplicate names
            for row in range(self.variable_view.rowCount()):
                if self.variable_view.item(row, 0).text() == name:
                    QMessageBox.warning(self, "Duplicate Name", "Variable name must be unique.")
                    return
            self.variable_view.addVariable(name, data_type)
            self.data_table.addVariable(name, data_type)

    @Slot()
    def deleteVariable(self):
        selected = self.variable_view.selectedItems()
        if selected:
            row = self.variable_view.row(selected[0])
            col = row  # Keep variables in sync
            self.variable_view.deleteVariable(row)
            self.data_table.deleteVariable(col)
        else:
            QMessageBox.information(self, "No Selection", "Please select a variable to delete.")

    @Slot()
    def addRow(self):
        self.data_table.addRow()

    @Slot()
    def deleteRow(self):
        selected = self.data_table.selectedItems()
        if selected:
            row = self.data_table.row(selected[0])
            self.data_table.deleteRow(row)
        else:
            QMessageBox.information(self, "No Selection", "Please select a row to delete.")

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec())"