自定义滚动条

Question

我有一个函数，它将.destroy()一个自定义滚动条，然后用一个新的主题重新创建滚动条。我的IDE (Eclipse)告诉我，我的函数包含Undefined Variables。这个错误并没有阻止我运行我的程序，而且我知道如果变量不存在，我的try语句将运行一个不同的代码来创建滚动条变量。我也知道我可以使用#@UndefinedVariable告诉我的IDE不要担心未定义的变量。

记住两件事：

1. 我的滚动条是定制的。这不是连动滚动条。我有这个自定义滚动条，所以我可以更改滚动条上的滑块、背景和箭头的颜色(主题)，因为tkinter滚动条在Windows或Mac机器上不能这样做。
2. 我的自定义滚动条目前没有一种方法来操作颜色，一旦它已经初始化。因此，我决定更改滚动条主题的最佳方法是创建一个try语句，该语句首先尝试销毁滚动条并使用新主题重新创建滚动条，或者在except上创建滚动条，因为开始时没有。

我的问题是：

用这种方式管理滚动条对我来说是个问题吗？我该换个办法吗？

我只是觉得我在使用try语句的方式并不意味着它是被使用的。也许我只是过度思考，这是好的，但最好是肯定地知道，这样我就不会养成错误的做事方式的习惯。

下面是我创建和管理滚动条的简化版本：

from tkinter import *
import scrollBarClass #Custom scrollbar class

pyBgColor =  "#%02x%02x%02x" % (0, 34, 64)
pyFrameColor =  "#%02x%02x%02x" % (0, 23, 45)
root = Tk()
root.title("MINT:   Mobile Information & Note-taking Tool")
root.geometry("500x500")
root.config(bg = pyFrameColor)
root.columnconfigure(0, weight=1)
root.rowconfigure(0, weight=1)
currentTextColor = 'orange'
def doNothing():
    print("Do lots of nothing?")
# ~~~~~~~~~~~~~~~~~< Theme >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
def MintThemeDefault(mainBG, textBG, txtColor):
    # Some theme configs
    # More theme configs
    # and so on...
    root.text.config(bg = textBG, fg = txtColor)
    try:
        vScrollBar.destroy() #@UndefinedVariable
        hScrollBar.destroy() #@UndefinedVariable
        makeScrollBars(textBG, txtColor, mainBG)
    except:
        makeScrollBars(textBG, txtColor, mainBG)

def makeScrollBars(textBG,txtColor,mainBG):

    vScrollBar = scrollBarClass.MyScrollbar(root, width=15, command=root.text.yview, troughcolor = textBG,
                                            buttontype = 'square', thumbcolor = txtColor, buttoncolor = mainBG)
    vScrollBar.grid(row = 0, column = 1, columnspan = 1, rowspan = 1, padx =0, pady =0, sticky = N+S+E)
    root.text.configure(yscrollcommand=vScrollBar.set)
    vScrollBar.config(background = mainBG)

    hScrollBar = scrollBarClass.MyScrollbar(root, height=15, command=root.text.xview, orient='horizontal', troughcolor = textBG,
                                            buttontype = 'square', thumbcolor = txtColor, buttoncolor = mainBG)
    hScrollBar.grid(row = 1 , column = 0, columnspan = 1, rowspan = 1, padx =0, pady =0, sticky = S+W+E)
    root.text.configure(xscrollcommand=hScrollBar.set)
    hScrollBar.config(background = mainBG)
# ~~~~~~~~~~~~~~~~~< THEMES >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~   
def MintTheme1():
    mainBGcolor = "#%02x%02x%02x" % (64,89,82)
    textBGcolor = "#%02x%02x%02x" % (17,41,41)
    txtColor = "#%02x%02x%02x" % (175, 167, 157)
    MintThemeDefault(mainBGcolor,textBGcolor,txtColor)
def MintTheme2():
    global currentTextColor
    mainBGcolor = "#%02x%02x%02x" % (14, 51, 51)
    textBGcolor = "#%02x%02x%02x" % (4, 22, 22)
    txtColor = "#%02x%02x%02x" % (223, 171, 111)
    MintThemeDefault(mainBGcolor,textBGcolor,txtColor) 
# ~~~~~~~~~~~~~~~~~< Theme Menu >~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
def libraryMenu():
    menu = Menu(root)
    root.config(menu=menu)    
    prefMenu = Menu(menu, tearoff=0)
    menu.add_cascade(label="Preferences", menu=prefMenu)
    prefMenu.add_command(label = "Mint Theme 1", command = MintTheme1)
    prefMenu.add_command(label = "Mint Theme 2", command = MintTheme2)
libraryMenu()
# ~~~~~~~~~~~~~~~~~< FRAMES >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
root.text = Text(root, undo = True)
root.text.grid(row = 0, column = 0, rowspan = 1, columnspan = 1, padx =0, pady =0, sticky = N+S+E+W)
root.text.config(bg = pyFrameColor, fg = "white", font=('times', 16), insertbackground = "orange")
root.text.config(wrap=NONE)
# ~~~~~~~~~~~~~~~~~< Default Theme >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
MintThemeDefault("#%02x%02x%02x"%(64,89,82),"#%02x%02x%02x"%(0, 23, 45),"#%02x%02x%02x"%(175, 167, 157))

root.mainloop()

为了测试这段代码，您需要scrollBarClass.py文件。这是我的Github链接文件。只需将scrollBarClass.py文件放在与用于测试代码的main.py文件相同的目录中即可。

我正在添加完整的代码以供评审。请注意，该程序运行良好，没有任何重大错误，但确实需要几个文件才能工作。有关这个名为GitHub的项目，请参阅我的薄荷。

from tkinter import *
import time
import tkinter.messagebox
import tkinter.simpledialog
import json
from string import ascii_letters, digits
import os
import scrollBarClass
# Created on Mar 21, 2017
# @author: Michael A McDonnal
pyBgColor =  "#%02x%02x%02x" % (0, 34, 64)
pyFrameColor =  "#%02x%02x%02x" % (0, 23, 45)
root = Tk()
root.title("MINT:   Mobile Information & Note-taking Tool")
root.geometry("1050x900")
root.minsize(800,600)
root.config(bg = pyFrameColor)
root.columnconfigure(0, weight=0)
root.columnconfigure(1, weight=1)
root.rowconfigure(0, weight=0)
root.rowconfigure(1, weight=1)
#root.rowconfigure(2, weight=1)
#~~~~~~~~~~~~~~~~~~~< Windows stuff >~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# row0label = Label(root)
# row0label.grid(row = 0 , column = 0 )
# row0label.configure(text = "                                                                              ")
#~~~~~~~~~~~~~~~~~~~< Global Variables Being Uses >~~~~~~~~~~~~~~~~~~~~~~~~~~
path = "./NotesKeys/"
colorPath = "./Colors/"
notebook = dict()
currentWorkingLib = ""
currentWorkingKeys = ""
currentWorkingButtonColor = "orange"
selectedTextColor = "orange"
selectedBGColor = "#%02x%02x%02x"
postUpdate = False

#~~~~~~~~~~~~~~~~~~~< USE TO open all files in Directory >~~~~~~~~~~~~~~~~~~~
with open("%s%s"%(path,"list_of_all_filenames"), "r") as listall:
    list_of_all_filenames = json.load(listall)
def openAllFiles():
    global path
    for filename in os.listdir(path):
        with open(path+filename, "r") as f:
            notebook[filename] = json.load(f)
openAllFiles()
#~~~~~~~~~~~~~~~~~~~< Prompt For New Library >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
valid_filename = ""
def new_lib_prompt():
    global valid_filename, list_of_all_filenames, path
    a_name = tkinter.simpledialog.askstring("Create New Note Library", "Alphanumeric and '_' only", initialvalue = "Name_Here")
    VALID_CHARS = "-_.() {}{}".format(ascii_letters, digits)
    valid_filename = ("".join(c for c in a_name if c in VALID_CHARS)).replace(" ", "_").lower()
    if valid_filename != "" and valid_filename != "name_here":
        if valid_filename not in list_of_all_filenames:
            createNewNotesAndKeys(valid_filename)
            list_of_all_filenames.append(valid_filename)
            with open("%s%s"%(path,"list_of_all_filenames"), "r+" ) as f:
                    json.dump(list_of_all_filenames, f, indent = "")
            libraryMenu()
        else:
            print ("Library already exist")
    else:
        print ("No Name Given")
def createNewNotesAndKeys(name):
    global path, list_of_all_filenames
    nName = name+"_notes"
    kName = name+"_keys"
    with open("./NotesKeys/default_notes", "r") as defaultN:
        nBase = json.load(defaultN)
    with open("./NotesKeys/default_keys", "r") as defaultK:
        kBase = json.load(defaultK)
    with open("%s%s"%(path,nName), "w") as outNotes:
        json.dump(nBase, outNotes, indent = "")
    with open("%s%s"%(path,kName), "w") as outNotes:
        json.dump(kBase, outNotes, indent = "")
    openAllFiles()
#~~~~~~~~~~~~~~~~~~~< USE TO CLOSE PROGRAM >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def closeprogram():
    answer = tkinter.messagebox.askquestion("Leaving MINT?","Are you sure you want to leave MINT")
    if answer == "yes":
        root.destroy()
    else:
        tkinter.messagebox.showinfo("MINTy Fresh!","Welcome Back XD")
def doNothing():
    print("Do lots of nothing?")
#~~~~~~~~~~~~~~~~~~~< Message Box >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def ihnb():
    answer = tkinter.messagebox.askquestion("Do you want to be a Python Programmer?","Do you want to program?")
    if answer == "yes":
        a1 = "Then be prepared to spend countless hours hating life!"
        root.text.delete(1.0, "end-1c")
        root.text.insert("end-1c", a1)
        root.text.see("end-1c")
    else:
        a2= "Smart move. Now go away!"
        root.text.delete(1.0, "end-1c")
        root.text.insert("end-1c", a2)
        root.text.see("end-1c")
#~~~~~~~~~~~~~~~~~~~< UPDATE keyword display >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def update_kw_display():
    pass
    listToPass = ["chose a library","chose a library_keys","chose a library_notes",""]
    if currentWorkingKeys not in listToPass:
        keys_to_be_updated = notebook[currentWorkingKeys]
        root.textSideL.delete(1.0, "end-1c")
        root.textSideR.delete(1.0, "end-1c")
        contr = 0
        for item in keys_to_be_updated:
            if contr == 0:
                root.textSideL.insert("end-1c",item+"\n")
                root.textSideL.see("end-1c")
                contr += 1
            else:
                root.textSideR.insert("end-1c",item+"\n")
                root.textSideR.see("end-1c")
                contr = 0
    else:
        print("In the list to pass")
#~~~~~~~~~~~~~~~~~~~< Search for words and highlight >~~~~~~~~~~~~~~~~~~~~~~~~
def searchTextbox(event=None):
    root.text.tag_configure("search", background="green")
    root.text.tag_remove('found', '1.0', "end-1c")
    wordToSearch = searchEntry.get().lower()
    idx = '1.0'
    while idx:
        idx = root.text.search(wordToSearch, idx, nocase=1, stopindex="end-1c")
        if idx:
            lastidx = '%s+%dc' % (idx, len(wordToSearch))
            root.text.tag_add('found', idx, lastidx)
            idx = lastidx
    root.text.tag_config('found', font=("times", 16, "bold"), foreground ='orange')
#~~~~~~~~~~~~~~~~~~~< UPDATE selected_notes! >~~~~~~~~~~~~~~~~~~~
def append_notes():
    global currentWorkingLib, currentWorkingKeys, path
    e1Current = keywordEntry.get().lower()
    e1allcase = keywordEntry.get()
    e2Current = root.text.get(1.0, "end-1c")
    answer = tkinter.messagebox.askquestion("Update Notes!","Are you sure you want update your Notes for "+e1allcase+" This cannot be undone!")
    if answer == "yes":
        if e1Current in notebook[currentWorkingLib]:
            statusE.config(text = "Updating Keyword & Notes for the "+currentWorkingLib+" Library!")
            dict_to_be_updated = notebook[currentWorkingLib]
            dict_to_be_updated[e1Current] = e2Current
            with open("%s%s"%(path,currentWorkingLib),"w") as working_temp_var:
                json.dump(dict_to_be_updated, working_temp_var, indent = "")
            statusE.config(text = "Update Complete")          
        else:
            statusE.config(text= "Creating New Keyword & Notes for the "+currentWorkingLib+" Library!")
            dict_to_be_updated = notebook[currentWorkingLib]
            dict_to_be_updated[e1Current] = e2Current
            with open("%s%s"%(path,currentWorkingLib), "w" ) as working_temp_var:
                json.dump(dict_to_be_updated, working_temp_var, indent = "")
            keys_to_be_updated = notebook[currentWorkingKeys]
            keys_to_be_updated.append(e1allcase)
            with open("%s%s"%(path,currentWorkingKeys), "w" ) as working_temp_keys:
                json.dump(keys_to_be_updated, working_temp_keys, indent = "")
            statusE.config(text = "Update Complete")
        update_kw_display()            
    else:
        tkinter.messagebox.showinfo("...","That was close!")      
#~~~~~~~~~~~~~~~~~~~< Entry Widget >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def kw_entry(event=None):
    global currentWorkingLib
    e1Current = keywordEntry.get().lower()
    #e1IgnoreCase = keywordEntry.get()
    if currentWorkingLib in notebook:
        note_var = notebook[currentWorkingLib]
        if e1Current in note_var:
            #tags_list=[r"(?:<<)",r"(?:>>)",r"(?:<)",r"(?:>)"]
            root.text.delete(1.0, "end-1c")
            root.text.insert("end-1c", note_var[e1Current])
            root.text.see("end-1c")
        else:
            root.text.delete(1.0, "end-1c")
            root.text.insert("end-1c", "Not a Keyword")
            root.text.see("end-1c")
    else:
        root.text.delete(1.0, "end-1c")
        root.text.insert("end-1c", "No Library Selected")
        root.text.see("end-1c")
#~~~~~~~~~~~~~~~~~~~< Preset Themes >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
baseBGimage=PhotoImage(file="./Colors/pybgbase.png")
bgLable = Label(root, image= baseBGimage)
bgLable.place(x = 0, y = 0)

bgLable.config(image = baseBGimage)
bgLable.image = baseBGimage
currentTextColor = 'orange'

def MintThemeDefault(mainBG, textBG, txtColor,bgimage):
    global currentTextColor
    currentTextColor = txtColor
    themeBGimage = bgimage
    textFrame.config(bg = textBG)
    entryBGimage.config(image = themeBGimage)
    entryBGimage.image = themeBGimage
    kwBGimage.config(image = themeBGimage)
    kwBGimage.image = themeBGimage
    bgLable.config(image = themeBGimage)
    bgLable.image = themeBGimage
    #entryBGimage.config(image = themeBGimage)
    #entryBGimage.image = themeBGimage
    root.config(bg = mainBG)
    root.text.config(bg = textBG, fg = txtColor)
    root.textSideL.config(bg = textBG, fg = txtColor)
    root.textSideR.config(bg = textBG, fg = txtColor)
    searchEntry.config(fg = txtColor, bg = textBG)
    keywordEntry.config(fg = txtColor, bg = textBG)
    statusFrame.config(bg = textBG)
    statusE.config(fg = txtColor, bg = textBG)
    statusW.config(fg = txtColor, bg = textBG)
    searchLabel.config(fg = txtColor, bg = textBG)
    keywordLabel.config(fg = txtColor, bg = textBG)
    UpdateKeywordsButton.config(fg = txtColor, bg = textBG)
    try:
        vScrollBar.destroy() #@UndefinedVariable
        hScrollBar.destroy() #@UndefinedVariable
        makeScrollBars(textBG, txtColor, mainBG)
    except:
        makeScrollBars(textBG, txtColor, mainBG)

def makeScrollBars(textBG,txtColor,mainBG):
    vScrollBar = scrollBarClass.MyScrollbar(textFrame, width=15, command=root.text.yview, troughcolor = textBG,
                                            buttontype = 'square', thumbcolor = txtColor, buttoncolor = mainBG)
    vScrollBar.grid(row = 0, column = 2, columnspan = 1, rowspan = 1, padx =0, pady =0, sticky = N+S+E)
    root.text.configure(yscrollcommand=vScrollBar.set)
    vScrollBar.config(background = mainBG)
    #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    hScrollBar = scrollBarClass.MyScrollbar(textFrame, height=15, command=root.text.xview, orient='horizontal', troughcolor = textBG,
                                            buttontype = 'square', thumbcolor = txtColor, buttoncolor = mainBG)
    hScrollBar.grid(row = 1 , column = 0, columnspan = 1, rowspan = 1, padx =0, pady =0, sticky = S+W+E)
    root.text.configure(xscrollcommand=hScrollBar.set)
    hScrollBar.config(background = mainBG)

def MintTheme1():
    mainBGcolor = "#%02x%02x%02x" % (64,89,82)
    textBGcolor = "#%02x%02x%02x" % (17,41,41)
    txtColor = "#%02x%02x%02x" % (175, 167, 157)
    bgimage=PhotoImage(file="./Colors/theme1bg.png")
    MintThemeDefault(mainBGcolor,textBGcolor,txtColor,bgimage)
def MintTheme2():
    global currentTextColor
    mainBGcolor = "#%02x%02x%02x" % (14, 51, 51)
    textBGcolor = "#%02x%02x%02x" % (4, 22, 22)
    txtColor = "#%02x%02x%02x" % (223, 171, 111)
    bgimage=PhotoImage(file="./Colors/theme2bg.png")
    MintThemeDefault(mainBGcolor,textBGcolor,txtColor,bgimage) 
#~~~~~~~~~~~~~~~~~~~< Menu function >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def updateWorkingLibKeys(filename):
    global currentWorkingLib,currentWorkingKeys
    currentWorkingLib = "{}_notes".format(filename).lower()
    currentWorkingKeys = "{}_keys".format(filename).lower()
    update_kw_display()
def libraryMenu():
    menu = Menu(root)
    root.config(menu=menu)
    fileMenu = Menu(menu, tearoff=0)
    menu.add_cascade(label="File", menu=fileMenu)
    fileMenu.add_command(label="Save", command=doNothing)
    fileMenu.add_command(label="Save As", command=doNothing)
    fileMenu.add_separator()
    fileMenu.add_command(label="Exit", command= closeprogram)

    libMenu = Menu(menu, tearoff=0)
    menu.add_cascade(label="Note Libraries", menu=libMenu)
    libMenu.add_command(label="Library Help Page - Not Implemented Yet", command=doNothing)
    libMenu.add_separator()
    libMenu.add_command(label="New Library", command=new_lib_prompt)
    libMenu.add_command(label="Lock Library - Not Implemented Yet", command=doNothing)
    libMenu.add_command(label="Delete Library! - Not Implemented Yet", command=doNothing)
    libMenu.add_separator()

    prefMenu = Menu(menu, tearoff=0)
    menu.add_cascade(label="Preferences", menu=prefMenu)
    prefMenu.add_command(label="Mint Theme 1", command=MintTheme1)
    prefMenu.add_command(label="Mint Theme 2", command=MintTheme2)

    helpMenu = Menu(menu, tearoff=0)
    menu.add_cascade(label="Help", menu=helpMenu)
    helpMenu.add_command(label="Info", command=doNothing)

    for filename in list_of_all_filenames:
        libMenu.add_command(label = "%s"%(filename), command = lambda filename=filename: updateWorkingLibKeys(filename))

libraryMenu()
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
textFrame = Frame(root, borderwidth = 0, highlightthickness = 0)
textFrame.grid(row = 0, column = 1, columnspan = 1, rowspan = 2, padx =0, pady =0, sticky = W+E+N+S)
textFrame.columnconfigure(0, weight=1)
textFrame.rowconfigure(0, weight=1)
textFrame.columnconfigure(1, weight=0)
textFrame.rowconfigure(1, weight=0)

entryFrame = Frame(root)
entryFrame.grid(row = 0, column = 0, rowspan = 1, columnspan = 1, padx =0, pady =0, sticky = W+E+N+S)
entryFrame.columnconfigure(0, weight=0)
entryFrame.columnconfigure(1, weight=0)
entryFrame.rowconfigure(0, weight=0)
entryFrame.rowconfigure(1, weight=0)
entryFrame.rowconfigure(2, weight=0)
entryBGimage = Label(entryFrame, image= baseBGimage, borderwidth = 0, highlightthickness = 0)
entryBGimage.image = baseBGimage
entryBGimage.place(x = 0, y = 0)
entryBGimage.config(image = baseBGimage)

kwListFrame = Frame(root, borderwidth = 0, highlightthickness = 0)
kwListFrame.grid(row = 1, column = 0, rowspan = 1, columnspan = 1, padx =0, pady =0, sticky = W+E+N+S)
kwListFrame.columnconfigure(0, weight=1)
kwBGimage = Label(kwListFrame, image= baseBGimage, borderwidth = 0, highlightthickness = 0)
kwBGimage.image = baseBGimage
kwBGimage.place(x = 0, y = 0)
kwBGimage.config(image = baseBGimage)

root.textSideL = Text(kwListFrame, width = 10, height = 20)
root.textSideL.place( x = 5, y = 5)
root.textSideL.config(wrap=NONE)
root.textSideR = Text(kwListFrame,  width = 10, height = 20)
root.textSideR.place( x = 95, y = 5)
root.textSideR.config(wrap=NONE)

statusFrame = Frame(root)
statusFrame.config(bg = pyFrameColor)
statusFrame.grid(row = 3, column = 0, rowspan = 3, columnspan = 2, padx =0, pady =0, sticky = W+E+N+S)
statusFrame.columnconfigure(0, weight=1)
statusFrame.columnconfigure(1, weight=1)
statusFrame.rowconfigure(0, weight=0)

root.text = Text(textFrame, undo = True)
root.text.grid(row = 0, column = 0, rowspan = 1, columnspan = 1, padx =0, pady =0, sticky = W+E+N+S)
root.text.config(bg = pyFrameColor, fg = "white", font=('times', 16), insertbackground = "orange")
root.text.config(wrap=NONE)
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
statusW = Label(statusFrame, font=("times", 16, "bold"), fg = "white", bg = "black", relief = SUNKEN, anchor = W)
statusW.grid(row = 0, column = 0, padx =1, pady =1, sticky = W+S)
statusW.config(text = "Operation Status", bg = "#%02x%02x%02x"%(0, 23, 45))

statusE = Label(statusFrame, font=("times", 16, "bold"), fg = "white", bg = "black", relief = SUNKEN, anchor = E)
statusE.grid(row = 0, column = 1, padx =1, pady =1, sticky = E+S)
statusE.config(bg = "#%02x%02x%02x"%(0, 23, 45))
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
searchLabel = Label(entryFrame)
searchLabel.grid(row = 1, column = 0, padx =5, pady=5)
searchLabel.config(text="Search Text Field")

searchEntry = Entry(entryFrame, width = 20)
searchEntry.bind("<Return>", searchTextbox)
searchEntry.grid(row = 1, column = 1, padx =5, pady=5)

keywordLabel = Label(entryFrame)
keywordLabel.grid(row = 0, column = 0, padx =5, pady=5)
keywordLabel.config(text="Keyword Search")

keywordEntry = Entry(entryFrame, width = 20)
keywordEntry.bind("<Return>", kw_entry)
keywordEntry.grid(row = 0, column = 1, padx =5, pady=5)

UpdateKeywordsButton = tkinter.Button(entryFrame, fg = 'Black', bg = 'Orange', text = "Update Notes", command = append_notes)
UpdateKeywordsButton.grid(row = 2, column = 0, padx =5, pady =5)

MintThemeDefault("#%02x%02x%02x"%(64,89,82),"#%02x%02x%02x"%(0, 23, 45),"#%02x%02x%02x"%(175, 167, 157),PhotoImage(file="./Colors/pybgbase.png"))
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
status_time = ""
def tick():
    global status_time
    time2 = time.strftime("%H:%M:%S")
    if time2 != status_time:
        status_time = time2
        statusE.config(text=time2+"  Preparing to do nothing...")
    statusE.after(200, tick)
tick()
#~~~~~~~~~~~~~~~~~~~< root Main Loop >~~~~~~~~~~~~~~~~~~~~~~~~~~~~
root.mainloop()

Answer 1

惯用Python：

• 唯一应该在方法或类之外的行是全局导入，这些行是:如果__name__ == '__main__'：sys.exit(main())，这使得在程序启动后更容易理解状态，并且在代码执行过程中随着变化而变得更容易遵循。就目前情况而言，我一眼就看不出顶层变量之间的关系。
• 避开globals。
• 使用可读的名字。像ihnb这样的名字是等待发生的时刻。
• searchTextBox的S event参数默认为null是有意的吗?除非您知道它将在没有参数的情况下被调用，否则不应该默认。
• 在类名中将Class作为后缀是多余的。
• 应该将各种GUI元素放在一个对象中。
• 与可能未定义的变量交互的try是一个确定的代码气味，表示程序的流是奇怪的。手动destroy对象是垃圾收集语言(如Python )中的另一种味道。有时这是必要的，但大多数情况下，您应该能够标记变量(或使用with语句)，而不必担心应用程序会泄漏资源。

PEP8的东西：

• 变量名应该是all_lower_case_and_underscore_separated。
• pep8工具将报告这一内容和其他各种内容。

个人偏好：

• 您不应该在签入代码中注释代码。
• 我从不从第三方代码中导入*，通常也不会从我自己的库中导入，以避免污染名称空间并可能产生冲突。root = tkinter.Tk()允许读者立即知道它是一个基于外部代码的对象，而不是同一个文件中的东西。
• 嵌套的if语句可以很容易地作为方法提取出来，从而清除代码。
• 注释不应包括花哨的分隔符。这些只是在那些不支持代码高亮化的编辑器时代才真正需要的，而且现在只是分散了对内容的注意力。