使用os.walk（）引用USB驱动器不会返回任何文件

时间：2016-02-06 22:04:53

标签： python tkinter

当我使用os.walk('/media/pi/UNTITLED')引用插入我的rasberry pi的USB驱动器时它什么都没有返回，但当我在脚本（os.walk('./movies')）的同一文件夹中引用某些内容时，它工作正常。我也没有收到错误消息。这是权限吗？我使用的路径不正确吗？我可以导航到终端中的USB驱动器。请参阅下面的代码了解我的整个脚本。我再次为长度道歉，但我不确定我哪里出错了。

谢谢你， 标记

from tkinter import *
from tkinter import ttk
import os
import os.path
import re
import fnmatch
import math

class scareGUI:

    def __init__(self, master):

        self.master = master
        tfLogo = PhotoImage(file='tf_logo.gif')
        scareBtn = PhotoImage(file='scare_btn.gif')
        scareBtnStop = PhotoImage(file='scare_btn_stop.gif')

        s = ttk.Style()
        s.configure('cbfont.TCheckbutton',font=('Courier',16))

        #self.selectedFileName = StringVar()

        #filter non video file types
        includes = ['*.mp4']
        includes = r'|'.join([fnmatch.translate(x) for x in includes])

        master.attributes('-zoomed', True)

        logoLabel=ttk.Label(self.master,text="TerrorForm ScareBox", font=("Helvetica", 24))
        logoLabel.config(image=tfLogo)
        logoLabel.pack(fill=BOTH)
        logoLabel.image=tfLogo
        directionLabel = ttk.Label(self.master,text="Select the files below you would like the ScareBox to play.", font=("Courier",20,'bold'))
        directionLabel.pack(fill=BOTH, padx=10, pady=20)

        ttk.Separator(self.master,orient='horizontal').pack(side="top",fill=X,padx=20, pady=20)

        self.frame_files=ttk.Frame(self.master)
        self.frame_files.pack(fill=X, padx=20)

        ttk.Separator(self.master,orient='horizontal').pack(side="top",fill=X,padx=20,pady=20)

        contVar=IntVar()
        playContinuousBtn = ttk.Checkbutton(self.master,text='Play movies in a loop without motion detection',style='cbfont.TCheckbutton',variable=contVar)

        playContinuousBtn.pack(side=TOP,padx=20, pady=20)

        frame_buttons = ttk.Frame(self.master)
        frame_buttons.pack(side=TOP)

        stopButton = ttk.Button(frame_buttons, text="I'm Affraid", command = master.destroy)
        stopButton.config(image=scareBtnStop)
        stopButton.config(compound=TOP)
        stopButton.image=scareBtnStop
        stopButton.pack(side=LEFT,fill=Y,padx=10, pady=10)

        closeButton = ttk.Button(frame_buttons, text="Start Scaring!", command = master.destroy)
        closeButton.config(image=scareBtn)
        closeButton.config(compound=TOP)
        closeButton.image=scareBtn
        closeButton.pack(side=LEFT,fill=Y,padx=10, pady=10)

        #pull file names from file system
        #for root, dirs, self.files in os.walk('./movies'):
        for root, dirs, self.files in os.walk('/media/pi/UNTITLED'):

            self.files = [os.path.join(root, f) for f in self.files]
            self.files = [f for f in self.files if re.match(includes, f)]

        #Determine number of rows in grid
        numfiles = len(self.files)

        dividesBy = False
        numRows = IntVar()
        numColumns = 4
        while (dividesBy == False):
            if(numfiles % numColumns == 0):
                numRows=int(numfiles/numColumns)
                dividesBy = True
            else:
                numfiles+=1


        #Print Check Boxes in Grid layout
        filmIcon = PhotoImage(file='tf_film_icon.gif')
        i=0
        self.checkedFiles=[None]*len(self.files)


        for r in range(numRows):
            for c in range(4):
                if (i<len(self.files)):
                   self.checkedFiles[i] = IntVar()
                   checkbutton = ttk.Checkbutton(self.frame_files, text=self.files[i], variable=self.checkedFiles[i])
                   checkbutton.config(image = filmIcon,compound = TOP)
                   checkbutton.image = filmIcon
                   checkbutton.grid(row = r, column = c)
                   i+=1


    def getChosenFiles(self):
        self.chosenFiles=[]
        for x in range(len(self.files)):
            if(self.checkedFiles[x].get()):
                    self.chosenFiles.append(self.files[x])
        return self.chosenFiles

    def main():
        root = Tk()
        scaregui = scareGUI(root)
        root.mainloop()

if __name__ == "__main__": main()

2 个答案:

答案 0 :(得分：0)

我认为includes可能会弄乱事情。我建议制作一个小代码片段来测试您是否可以访问该特定目录。也许是这样的：

import os

includes = ('.mp4',)

movie_list = []
for root, dirs, files in os.walk('/media/pi'):
    files = [f for f in files if f.endswith(includes)]
    movie_list.extend([os.path.join(root, f) for f in files])

print('number of files: ', len(movie_list))

这将列出以.mp4结尾的所有文件，并打印找到的文件数。如果您希望将movie_list存储在类可访问的变量中，则self.movie_list可以是<TextBox x:Class="HelloWorld.ElphantTextBox" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:HelloWorld" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="300" Style="{DynamicResource ElphantTextBoxStyle}" Text="Hello"> <TextBox.Resources> <SolidColorBrush x:Key="TextBox.Static.Border" Color="#FFABAdB3"/> <SolidColorBrush x:Key="TextBox.MouseOver.Border" Color="#FF7EB4EA"/> <SolidColorBrush x:Key="TextBox.Focus.Border" Color="#FF569DE5"/> <Style x:Key="ElphantTextBoxStyle" TargetType="{x:Type TextBox}"> <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/> <Setter Property="BorderBrush" Value="{StaticResource TextBox.Static.Border}"/> 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答案 1 :(得分：0)

确定。所以我解决了自己的问题。我没有将文件名附加到循环底部的列表中。在我的初始测试中我没有子目录的事实导致我错误地认为它正在工作。我的解决方案代码如下。

matches=[]
for root, dirs, self.files in os.walk('/media/pi'):
    for filename in self.files:
        if filename.endswith(('.mp4','.mov','.avi')):
            matches.append(os.path.join(root,filename))
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