Question

我尝试在wx中制作我自己的科学计算器，但是例如当计算3 ^ 4时屏幕上显示的是pow(x,y)问题是我希望这个计算看起来像3 ^ 4 。这是我的代码：

from __future__ import division # So that 8/3 will be 2.6666 and not 2
import wx
from math import * 
from cmath import pi

class Calculator(wx.Panel):
    '''Main calculator dialog'''
    def __init__(self, *args, **kwargs):
        wx.Panel.__init__(self, *args, **kwargs)
        sizer = wx.BoxSizer(wx.VERTICAL) # Main vertical sizer

        self.display = wx.ComboBox(self) # Current calculation
        sizer.Add(self.display, 0, wx.EXPAND|wx.BOTTOM, 8) # Add to main sizer

        gsizer = wx.GridSizer(9,4, 8, 8)
        for row in (("(",")","x^y","root"),
                    ("sin","cos","tan","e^x"),
                    ("arcsin","arccos","arctan","π"),
                    ("sinh","cosh","tanh","e"),
                    ("arcsinh","arccosh","arctanh","n!"),
                    ("7", "8", "9", "/"),
                    ("4", "5", "6", "*"),
                    ("1", "2", "3", "-"),
                    ("0", ".", "C", "+")):
            for label in row:
                b = wx.Button(self, label=label, size=(50,-1))
                gsizer.Add(b)
                b.Bind(wx.EVT_BUTTON, self.OnButton)
        sizer.Add(gsizer, 1, wx.EXPAND)

        # [    =     ]
        b = wx.Button(self, label="=")
        b.Bind(wx.EVT_BUTTON, self.OnButton)
        sizer.Add(b, 0, wx.EXPAND|wx.ALL, 8)
        self.equal = b

        # Set sizer and center
        self.SetSizerAndFit(sizer)

    def OnButton(self, evt):
        '''Handle button click event'''

        # Get title of clicked button
        label = evt.GetEventObject().GetLabel()

        if label == "=": # Calculate
            self.Calculate()

        elif label == "C": # Clear
            self.display.SetValue("")
        elif label == "x^y":
            self.display.SetValue("pow(x,y)")
        elif label == "x^2":
            self.display.SetValue("pow(x,2)")
        elif label == "10^x":
            self.display.SetValue("pow(10,x)")
        elif label == "e^x":
            self.display.SetValue("exp")
        elif label == "arcsin":
            self.display.SetValue("asin(x)")
        elif label == "arccos":
            self.display.SetValue("acos")
        elif label == "arcsinh":
            self.display.SetValue("asinh")
        elif label == "arccosh":
            self.display.SetValue("acosh")
        elif label == "arctanh":
            self.display.SetValue("atanh")
        elif label == "arctan":
            self.display.SetValue("atan")
        elif label == "n!":
            self.display.SetValue("factorial")
        elif label == "π":
            self.display.SetValue("pi")
        elif label == "root":
            self.display.SetValue("sqrt")



        #x^y,x^2,10^x


        else: # Just add button text to current calculation
            self.display.SetValue(self.display.GetValue() + label)
            self.display.SetInsertionPointEnd()
            self.equal.SetFocus() # Set the [=] button in focus

    def Calculate(self):
        """
        do the calculation itself

        in a separate method, so it can be called outside of a button event handler
        """
        try:
            compute = self.display.GetValue()
            # Ignore empty calculation
            if not compute.strip():
                return

            # Calculate result
            result = eval(compute)

            # Add to history
            self.display.Insert(compute, 0)

            # Show result
            self.display.SetValue(str(result))
        except e:
            wx.LogError(str(e))
            return

    def ComputeExpression(self, expression):
        """
        Compute the expression passed in.

        This can be called from another class, module, etc.
        """
        print ("ComputeExpression called with:"), expression
        self.display.SetValue(expression)
        self.Calculate()

class MainFrame(wx.Frame):
    def __init__(self, *args, **kwargs):
        kwargs.setdefault('title', "Calculator")
        wx.Frame.__init__(self, *args, **kwargs)

        self.calcPanel = Calculator(self)

        # put the panel on -- in a sizer to give it some space
        S = wx.BoxSizer(wx.VERTICAL)
        S.Add(self.calcPanel, 1, wx.GROW|wx.ALL, 10)
        self.SetSizerAndFit(S)
        self.CenterOnScreen()


if __name__ == "__main__":
    # Run the application
    app = wx.App(False)
    frame = MainFrame(None)
    frame.Show()
    app.MainLoop()

Answer 1

您的问题是您使用math模块的语法来计算结果您的其他功能也会遇到同样的问题您必须将函数放入math语法
中解决pow(x,y)问题：

        elif label == "x^y":
 #           self.display.SetValue("pow(x,y)")
            self.display.SetValue(self.display.GetValue() + "^")

然后在Calculate函数中：

    if "^" in compute:
        start, end = compute.split("^")
        compute = "pow("+start+","+end+")"

您有其他相关问题，我请您解决。

遇到wxpython的问题

1 个答案: