Question

我已编写此代码，试图在我的程序GUI中添加CSVModify和浏览按钮。

问题是，如果我在CSVModify()函数下键入browseCSV，则表示CSVModify未定义。如果CSVModify browseCSV下的GUI未按以下代码进行缩进，则我的CSVModify不会显示，而是直接跳至browseCSV功能。

我希望首先运行CSVModify以便我可以选择一个文件，然后我想在此之后运行Python来修改我选择的文件，该文件存储在变量filename下。我是#attempt to make CSVModifier with GUI from Tkinter import * import csv class Window: def __init__(self, master): #File Selection csvfile=Label(root, text="File").grid(row=1, column=0) bar=Entry(master).grid(row=1, column=1) #Buttons y=7 self.button1 = Button(root, text="OK", command=master.destroy) y+=1 self.button1.grid(row=10, column=3, sticky = W + E) self.button2 = Button(root, text="Browse", command=self.browseCSV) self.button2.grid(row=1, column=3) def CSVModify(): new_columns = [] userinput = raw_input("What string would you like to remove? ") changes = { userinput : '', } with open(filename, 'rb') as f: reader = csv.reader(f) for column in reader: new_column = column for key, value in changes.items(): new_column = [x.replace(key, value) for x in new_column] new_columns.append(new_column) with open(("modified" + filename), 'wb') as f: writer = csv.writer(f) writer.writerows(new_columns) def browseCSV(self): from tkFileDialog import askopenfilename filename = askopenfilename() self.button3 = Button(root, text=filename,) self.button3.grid() CSVModify() root = Tk() window=Window(root) root.mainloop()的新手并且编码一般，所以请帮助我了解我哪里出错了。

button3

我对public int HwDecoderInputCallback( int size, long pts, int flag ){ int ret = 0, flags = 0; final int TIME_OUT_US = 10000; int inputBufIndex = 0; try{ try{ Thread.sleep(5); }catch(InterruptedException e){ } inputBufIndex = chd.decoder.dequeueInputBuffer(TIME_OUT_US); if( inputBufIndex >= 0 ){ ByteBuffer inputBuf = inputBuffer[inputBufIndex]; inputBuf.clear(); getVideoPacketHW(inputBuf, size); chd.decoder.queueInputBuffer( inputBufIndex, 0, size, pts, flag); } }catch(Exception e1){ // Irrecoverable errors. Release Media codec and recreate resources. videoWindow.glRenderer.restoreVideoSurface(); ret = -1; } return ret; } public int HwDecoderOutputCallBack(){ int status = 0; final int TIME_OUT_US = 10000; try{ int dec_status = chd.decoder.dequeueOutputBuffer(mBufferInfo, TIME_OUT_US); if( dec_status == MediaCodec.INFO_TRY_AGAIN_LATER ){ Log.i("Candy MediaPlayer","Output try again"); }else if( dec_status == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED){ Log.i("Candy MediaPlayer","Output buffer changed"); outputBuffer = chd.decoder.getOutputBuffers(); }else if( dec_status == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED){ Log.i("Candy MediaPlayer","Buffer fmt changed"); }else if( dec_status < 0){ Log.i("Candy MediaPlayer","Output buffer index < 0"); }else{ if(((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM)!=0)){ Log.i("Candy MediaPlayer","End of stream."); chd.decoder.releaseOutputBuffer(dec_status, false); status = 1; }else{ candySyncVideoHW( mBufferInfo.presentationTimeUs ); chd.decoder.releaseOutputBuffer(dec_status, true); status = 0; } } } catch( Exception e){ // Irrecoverable errors. Release Media codec and recreate resources. videoWindow.glRenderer.restoreVideoSurface(); } return status; }的代码只是为了测试文件路径是否正确找到并存储。

Answer 1

您的代码中至少有一个问题是您要创建两个根窗口（root = Tk()和Tk().withdraw()）。 Tkinter设计为只有一个根窗口运行。

您可能还有其他问题，但代码中的缩进使得无法知道您的代码实际上是什么样的。

Answer 2

解决了这个问题。感谢所有评论过有用解决方案等的人。它最终成为我完全错误地定义和调用CSVModify函数的事实。以下是感兴趣的任何人的更新代码。

#attempt to make CSVModifier with GUI
from Tkinter import *
import csv

class Window:
    def __init__(self, master):
        #File Selection
        csvfile=Label(root, text="File").grid(row=1, column=0)
        bar=Entry(master).grid(row=1, column=1)

        #Buttons
        y=7
        self.button1 = Button(root, text="OK", command=master.destroy)
        y+=1
        self.button1.grid(row=10, column=3, sticky = W + E)
        self.button2 = Button(root, text="Browse", command=self.browseCSV)
        self.button2.grid(row=1, column=3)


    def browseCSV(self):
        from tkFileDialog import askopenfilename
        filename = askopenfilename()
        self.button3 = Button(root, text=filename)
        self.button3.grid()

def CSVModify(): 
        new_columns = []    
        userinput = raw_input("What string would you like to remove? ") 

        changes = { 
            userinput : '',
            }

        with open(filename, 'rb') as f:
            reader = csv.reader(f)
            for column in reader:
                new_column = column
            for key, value in changes.items():
                new_column = [x.replace(key, value) for x in new_column]
                new_columns.append(new_column)

        with open(("modified" + filename), 'wb') as f: 
            writer = csv.writer(f)
            writer.writerows(new_columns)


root = Tk()
window=Window(root)
root.mainloop()
CSVModify()

如果调用函数，则跳过Tkinter GUI

2 个答案: