Question

我需要创建一个GUI来将数据输入矩阵或表格并读取此表格数据完美的解决方案是将输入表单限制为仅允许float 例如：

A=[[1.02,-0.25,-0.30,0.515],[-0.41,1.13,-0.15,1.555],[-0.25,-0.14,1.21,2.780]]

问题：

我可以使用什么？
Tkinter没有表，Python 3.3.2
PyQt4怎么样？
也许您可以举例说明如何从[[],[],[]]中的表中获取数据？有人有想法吗？

由于

Answer 1

使用tkinter，您不需要特殊的表小部件来执行此操作 - 只需创建一个正常条目小部件的网格。如果你有这么多，你需要一个滚动条，它稍微有点困难（这个网站上有一些例子可以做到这一点），但只是为了创建一个小的网格，这非常简单。

这是一个包含一些输入验证的示例：

import tkinter as tk

class SimpleTableInput(tk.Frame):
    def __init__(self, parent, rows, columns):
        tk.Frame.__init__(self, parent)

        self._entry = {}
        self.rows = rows
        self.columns = columns

        # register a command to use for validation
        vcmd = (self.register(self._validate), "%P")

        # create the table of widgets
        for row in range(self.rows):
            for column in range(self.columns):
                index = (row, column)
                e = tk.Entry(self, validate="key", validatecommand=vcmd)
                e.grid(row=row, column=column, stick="nsew")
                self._entry[index] = e
        # adjust column weights so they all expand equally
        for column in range(self.columns):
            self.grid_columnconfigure(column, weight=1)
        # designate a final, empty row to fill up any extra space
        self.grid_rowconfigure(rows, weight=1)

    def get(self):
        '''Return a list of lists, containing the data in the table'''
        result = []
        for row in range(self.rows):
            current_row = []
            for column in range(self.columns):
                index = (row, column)
                current_row.append(self._entry[index].get())
            result.append(current_row)
        return result

    def _validate(self, P):
        '''Perform input validation. 

        Allow only an empty value, or a value that can be converted to a float
        '''
        if P.strip() == "":
            return True

        try:
            f = float(P)
        except ValueError:
            self.bell()
            return False
        return True

class Example(tk.Frame):
    def __init__(self, parent):
        tk.Frame.__init__(self, parent)
        self.table = SimpleTableInput(self, 3, 4)
        self.submit = tk.Button(self, text="Submit", command=self.on_submit)
        self.table.pack(side="top", fill="both", expand=True)
        self.submit.pack(side="bottom")

    def on_submit(self):
        print(self.table.get())


root = tk.Tk()
Example(root).pack(side="top", fill="both", expand=True)
root.mainloop()

有关输入验证的更多信息，请访问：Interactively validating Entry widget content in tkinter

GUI（输入和输出矩阵）？

1 个答案: