编程过程中我遇到这种问题：

Traceback (most recent call last):
  File "C:\Users\asus\Desktop\High and Low Pass Filtering.py", line 26, in <module>
    wav = AudioSegment.from_wav("1.wav")
  File "D:\soft2\python\Pythonfiles\lib\site-packages\pydub\audio_segment.py", line 728, in from_wav
    return cls.from_file(file, 'wav', parameters=parameters)
  File "D:\soft2\python\Pythonfiles\lib\site-packages\pydub\audio_segment.py", line 665, in from_file
    info = mediainfo_json(orig_file)
  File "D:\soft2\python\Pythonfiles\lib\site-packages\pydub\utils.py", line 263, in mediainfo_json
    res = Popen(command, stdin=stdin_parameter, stdout=PIPE, stderr=PIPE)
  File "D:\soft2\python\Pythonfiles\lib\subprocess.py", line 756, in __init__
    restore_signals, start_new_session)
  File "D:\soft2\python\Pythonfiles\lib\subprocess.py", line 1155, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] 系统找不到指定的文件。
解决方法：
根据提示找到lib中的subprocess.py文件（比如小编的就是 D:\soft2\python\Pythonfiles\lib\subprocess.py） ,查找class Popen模块，再将这个模块中的
__init__函数中的shell = False 改成shell = True
                            
pytesseract.pytesseract.TesseractNotFoundError: tesseract is not installed or it's not in your path  && FileNotFoundError: [WinError 2] 系统找不到指
                            
  C:\Users\k\Desktop\test>python test.pyTraceback (most recent call last):  File "C:\Users\k\Anaconda3\lib\site-packages\pytesseract\pytesseract.py", line 184, in run_tesseract    proc = subpr
                            
python3.5海龟绘图 python海龟绘图代码5
                            
 首先安装turtle库，pip install turtleturtle.pendown()#画笔落下
turtle.penup()#画笔提起
turtlr.color(*args)#设置画笔颜色
turtle.reset()#重置
turtle.clear()#清空
turtle.showturtle():
turtle.hideturtle():用turtle画奥运五环impor
                            
java jtree去掉连线 java jtree增加删除节点
                            
 这几天在做关于树的题目，感觉结点的操作有点难度。import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
import java.io.*;
//定义该类继承自JFrame
public class TryTre
                            
python spi编程 python spice
                            
 如题，使用python实现字符串切片，提供两种思路方法：方法一：使用python的切片Slice操作符方法二：传统思维，遍历以下是Demo（代码基于python3.6）：比如从字符串"awegbytrcuimdpon"，得到结果字符串"abcd"#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# 方法一
a = "awegbytrcuimdpon"