Question

基本上我现在正在学习Python，所以我只是使用其他人的模板而只是编辑它们。到目前为止，我已经了解到Python中的indention非常挑剔。但是我被卡住了，我想我已经正确地缩进了所有内容并且已经定义了，但我仍然在我的控制台中收到此错误。（视窗）

（是的，我知道它还没有完成）

"...\documents\python_files>python calc.py
Traceback (most recent call last):
  File "calc.py", line 20, in <module>
    class Calculator(wx.Dialog):
  File "calc.py", line 46, in Calculator
    b = wx.Button(self, -1, label)
NameError: name 'self' is not defined"

这是我的代码（我想我把它放在代码格式中）：

# -*- coding: utf-8 -*-
from __future__ import division

__author__ = 'Sean'
__version__ = '0.0.2'

#Calculator GUI:

# ____________v
#[(][)][^][log]
#[C][±][√][%]
#[7][8][9][/]
#[4][5][6][*]
#[1][2][3][-]
#[0][.][+][=]

import wx
from math import *

class Calculator(wx.Dialog):
    '''Main calculator dialog'''
    def __init__(self):
        title = 'Calculator version %s' % __version__
        wx.Dialog.__init__(self, None, -1, title)
        sizer = wx.BoxSizer(wx.VERTICAL) # Main vertical sizer

        # ____________v
        self.display = wx.ComboBox(self, -1)
        sizer.Add(self.display, 0, wx.EXPAND)


    #[(][)][^][log]
    #[C][±][√][%]
    #[7][8][9][/]
    #[4][5][6][*]
    #[1][2][3][-]
    #[0][.][+][=]
    gsizer = wx.GridSizer(4,6)
    for row in (("(",")","^","log"),
    ("C","±","√","%"),
    ("7", "8", "9", "/"),
    ("4", "5", "6", "*"),
    ("1", "2", "3", "-"),
    ("0", ".", "+", "=")):
        for label in row:
            b = wx.Button(self, -1, label)
            gsizer.Add(b)
            self.Bind(wx.EVT_Button,self.OnButton, b)
            sizer.Add(gsizer, 1, wx.EXPAND)

    b = wx.Button(self, -1, "=")
    self.Bind(wx.EVT_BUTTON, self.OnButton, b)
    sizer.Add(b, 0, wx.EXPAND)
    self.equal = b

    self.SetSizer(sizer)
    sizer.Fit(self)
    self.CenterOnScreen()

def OnButton(self, evt):
    '''Handle button click event'''
    label = evt.GetEventObject().GetLabel()

    if label == '=':
        try:
            compute = self.display.GetValue()
            if not compute.strip():
                return

            result = eval(compute)

            self.display.Insert(compute, 0)

            self.display.SetValue(str(result))
        except Exception as err:
            wx.LogError(str(err))
            return

    elif label == 'C':
        self.display.SetValue('')

    else:
        self.display.SetValue(self.display.GetValue() + label)
        self.equal.SetFocus()

if __name__ == '__main__':
    app = wx.PySimpleApp()
    dlg = Calculator()
    dlg.ShowModal()
    dlg.Destroy()

Answer 1

您对部分__init__方法的缩进是错误的：

class Calculator(wx.Dialog):
    '''Main calculator dialog'''
    def __init__(self):
        title = 'Calculator version %s' % __version__
        wx.Dialog.__init__(self, None, -1, title)
        sizer = wx.BoxSizer(wx.VERTICAL) # Main vertical sizer
        self.display = wx.ComboBox(self, -1)
        sizer.Add(self.display, 0, wx.EXPAND)
        # This part was indented wrong
        gsizer = wx.GridSizer(4,6)
        for row in (("(",")","^","log"),
                    ("C","±","√","%"),
                    ("7", "8", "9", "/"),
                    ("4", "5", "6", "*"),
                    ("1", "2", "3", "-"),
                    ("0", ".", "+", "=")):
        for label in row:
            b = wx.Button(self, -1, label)
            gsizer.Add(b)
            self.Bind(wx.EVT_Button,self.OnButton, b)
            sizer.Add(gsizer, 1, wx.EXPAND)
        b = wx.Button(self, -1, "=")
        self.Bind(wx.EVT_BUTTON, self.OnButton, b)
        sizer.Add(b, 0, wx.EXPAND)
        self.equal = b

你应该阅读Python。来自Python 2 tutorial：

请注意，基本块中的每一行必须缩进相同的数量。

另一件需要阅读的内容是Python Style Guide。

名称错误和其他？

1 个答案: