commit c7fab80594dbb88254f356891f40a710ef0f2e40
Author: LiangXiao <liangxiao0991@gmail.com>
Date:   Wed Mar 25 11:34:46 2020 +0800

    finish the home work

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7191673
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+.vscode
+*.pyc
+config.json
+out.txt
+
+*.zip
\ No newline at end of file
diff --git a/GUI.py b/GUI.py
new file mode 100644
index 0000000..a6ccc1e
--- /dev/null
+++ b/GUI.py
@@ -0,0 +1,277 @@
+import tkinter as tk
+import thread
+class EntryWithLabel():
+    def __init__(self, root, labelValue, default, **kw):
+        self.root = root
+        self.labelValue = labelValue
+        self.default = default
+        self.frame = tk.Frame(root)
+        self.label = tk.Label(self.frame, text=labelValue)
+        self.var = tk.Variable()
+        self.var.set(default)
+        self.entry = tk.Entry(self.frame, textvariable=self.var, **kw)
+    
+    def pack(self, **kw):
+        self.label.pack(side=tk.LEFT)
+        self.entry.pack(side=tk.RIGHT)
+        self.frame.pack(**kw)
+        return self
+    def get(self):
+        return self.var.get()
+    def set(self, value):
+        return self.var.set(value)
+
+class LabelWithReadOnlyText():
+    def __init__(self, root, labelValue, default):
+        self.root = root
+        self.labelValue = labelValue
+        self.var = default
+        self.frame = tk.Frame(root)
+        self.label = tk.Label(self.frame, text=labelValue)
+        self.text = tk.Label(self.frame, text=self.var)
+    def pack(self, **kw):
+        self.label.pack(side=tk.LEFT)
+        self.text.pack(side=tk.RIGHT)
+        self.frame.pack(**kw)
+        return self
+    def set(self, value):
+        self.var = value
+        self.text.config(text=self.var)
+    def get(self):
+        return self.var
+
+class ProgressBar():
+    def __init__(self, root, labelValue):
+        self.frame = tk.Frame(root)
+        self.label_title = tk.Label(self.frame, text=labelValue)
+        self.canvas = tk.Canvas(self.frame, width=200, height=22, bg="white")
+        self.base_line = self.canvas.create_rectangle(2,2,200,23,width = 1,outline = "black", fill="white")
+        self.fill_line = self.canvas.create_rectangle(2,2,0,23,width = 0,fill = "blue")
+        self.label_progress = tk.Label(self.frame, width=10)
+        self.progress = 0
+    def setProgress(self, progress, text):
+        if text:
+            self.label_progress.config(text=text)
+        if progress < self.progress:
+            self.canvas.create_rectangle(2,2,200,23,width = 1,outline = "black", fill="white")
+            self.fill_line = self.canvas.create_rectangle(2,2,0,23,width = 0,fill = "blue")
+        if progress > 1:
+            progress = 1
+        self.progress = progress
+        self.canvas.coords(self.fill_line, (0, 0, 200*progress, 30))
+        self.frame.update()
+    def pack(self, **kw):
+        self.label_title.pack(side=tk.LEFT)
+        self.canvas.pack(side=tk.LEFT)
+        self.label_progress.pack(side=tk.LEFT)
+        self.frame.pack(**kw)
+        return self
+
+
+class BaseInforFrame():
+    def __init__(self, root):
+        self.labelframe = tk.LabelFrame(root, text="基本信息")
+        self.entry_number = EntryWithLabel(self.labelframe, "学号", "2017210281")
+        self.label_b = LabelWithReadOnlyText(self.labelframe, "B:", 3)
+        self.label_task = LabelWithReadOnlyText(self.labelframe, "任务:", "B")
+        self.entry_no = EntryWithLabel(self.labelframe, "本机编号:", 1)
+        self.entry_total = EntryWithLabel(self.labelframe, "总机器数量:", 1)
+
+        self.entry_number.var.trace("w", self._updateNumber)
+        self.entry_no.var.trace("w", self._updateNo)
+        self.entry_total.var.trace("w", self._updateTotal)
+    def disable(self):
+        self.entry_no.entry.config(state="disable")
+        self.entry_number.entry.config(state="disable")
+        self.entry_total.entry.config(state="disable")
+    def normal(self):
+        self.entry_no.entry.config(state="normal")
+        self.entry_number.entry.config(state="normal")
+        self.entry_total.entry.config(state="normal")
+    def pack(self, **kw):
+        self.entry_number.pack()
+        self.label_b.pack()
+        self.label_task.pack()
+        self.entry_no.pack()
+        self.entry_total.pack()
+        self.labelframe.pack(**kw)
+        return self
+
+    def _bToTask(self, b):
+        if b > 2:
+            return "B"
+        else:
+            return "A"
+    def inputToInt(self, entry):
+        textcheck = str(entry.get())
+        textcheck = ''.join(i for i in textcheck if i in '0123456789')
+        if textcheck == '':
+            return None
+        return int(textcheck)
+
+    def _updateNumber(self, *args):
+        number = self.inputToInt(self.entry_number)
+        if number == None:
+            return
+        try:
+            self.entry_number.set(number)
+            b = number % 19
+            self.label_b.set(b)
+            self.label_task.set(self._bToTask(b))
+            return False
+        except:
+            pass
+    def _updateNo(self, *args):
+        no = self.inputToInt(self.entry_no)
+        total = self.inputToInt(self.entry_total)
+        if no == None or total == None:
+            return
+        if no > total:
+            self.entry_no.set(total)
+        elif no < 1:
+            self.entry_no.set(1)
+        else:
+            self.entry_no.set(no)
+            
+    def _updateTotal(self, *args):
+        total = self.inputToInt(self.entry_total)
+        if total == None:
+            return
+        if total < 1:
+            total = 1
+        self.entry_total.set(total)
+
+
+class SpiderStatus():
+    def __init__(self, root):
+        self.labelframe = tk.LabelFrame(root, text="爬取结果")
+        self.text_info = tk.Text(self.labelframe, width= 100, height= 20)
+    def pack(self, **kw):
+        self.text_info.pack()
+        self.labelframe.pack(**kw)
+    def set(self, text):
+        # self.text_info.delete('1.0','end')
+        self.text_info.insert('end', text+"\n")
+        self.text_info.see(tk.END)
+
+class Timmer():
+    def __init__(self, root, start, stop):
+        self.pause = False
+        self.start = False
+        self.sleeptime = 4.0
+        self.maxoffset = 212
+        self.startP = start
+        self.stop = stop
+
+        self.labelframe = tk.LabelFrame(root, text="计时器")
+        self.progress_each = ProgressBar(self.labelframe, "每次计时:")
+        self.progress_totle = ProgressBar(self.labelframe, "总进度:")
+        self.entry_sleepTime = EntryWithLabel(self.labelframe, "每次延时(s):", self.sleeptime)
+        self.entry_maxOffset = EntryWithLabel(self.labelframe, "最大偏移:", self.maxoffset)
+        self.btnframe = tk.Frame(self.labelframe)
+        self.button_startStop = tk.Button(self.btnframe, text="开始", command=self.startStop)
+        self.button_pause = tk.Button(self.btnframe, text="暂停", command=self._pause, state="disable")
+
+        self.entry_sleepTime.var.trace("w", self._updateSleepTime)
+        self.entry_maxOffset.var.trace("w", self._updateMaxOffset)
+    def pack(self, **kw):
+        self.progress_each.pack()
+        self.progress_totle.pack()
+        self.entry_sleepTime.pack()
+        self.entry_maxOffset.pack()
+        self.button_startStop.pack(side=tk.LEFT)
+        self.button_pause.pack(side=tk.LEFT)
+        self.btnframe.pack()
+        self.labelframe.pack(**kw)
+    def inputToInt(self, entry):
+        textcheck = str(entry.get())
+        textcheck = ''.join(i for i in textcheck if i in '0123456789')
+        if textcheck == '':
+            return None
+        return int(textcheck)
+    def inputToFloat(self, entry):
+        textcheck = str(entry.get())
+        textcheck = ''.join(i for i in textcheck if i in '0123456789.')
+        if textcheck == '':
+            return None
+        if textcheck.count('.') > 1:
+            first = textcheck.find('.')
+            second = textcheck.find('.', first+1)
+            textcheck = textcheck[0:second]
+        return float(textcheck)
+    def _updateSleepTime(self, *args):
+        sleeptime = self.inputToFloat(self.entry_sleepTime)
+        if sleeptime == None:
+            return
+        self.sleeptime = sleeptime
+        self.entry_sleepTime.set(self.sleeptime)
+    def _updateMaxOffset(self, *args):
+        maxoffset = self.inputToInt(self.entry_maxOffset)
+        if maxoffset == None:
+            return
+        self.maxoffset = maxoffset
+        self.progress_totle.setProgress(int(self.progress_totle.label_progress.config("text")[-1])/self.maxoffset, None)
+        self.entry_maxOffset.set(self.maxoffset)
+    def startStop(self):
+        if self.start and not self.pause: # 停止
+            self.start = False
+            self.pause = False
+            self.stop()
+            self.button_startStop.config(text="开始")
+            self.button_pause.config(state="disable")
+        elif not self.start and not self.pause: # 开始
+            self.start = True
+            self.pause = False
+            self.startP()
+            self.button_startStop.config(text="停止")
+            self.button_pause.config(state="normal")
+        elif self.start and self.pause: # 继续
+            self.start = True
+            self.pause = False
+            self.button_startStop.config(text="停止")
+            self.button_pause.config(state="normal")
+    def _pause(self):
+        self.button_pause.config(state="disable")
+        self.button_startStop.config(text="继续")
+        self.pause = True
+
+
+class MainGui():
+    def __init__(self, backend):
+        self.root = tk.Tk()
+        self.root.title("Web搜索技术第一次作业")
+        self.backend = backend
+        self.thread = None
+        self.topFrame = tk.Frame(self.root)
+        self.baseinfo = BaseInforFrame(self.topFrame)
+        self.timmer = Timmer(self.topFrame, self.startThread, self.stopThread)
+        self.spiderstatus = SpiderStatus(self.root)
+    
+    def start(self):
+        self.baseinfo.pack(side=tk.LEFT)
+        self.timmer.pack(side=tk.LEFT)
+        self.topFrame.pack()
+        self.spiderstatus.pack()
+        self.timmer.progress_totle.setProgress(self.backend.getOffset()/self.timmer.maxoffset, str(self.backend.getOffset()))
+        self.root.protocol("WM_DELETE_WINDOW", self.on_closing)
+        self.root.mainloop()
+        
+    def on_closing(self):
+        if self.thread and self.thread.is_alive():
+            self.thread.terminate()
+            thread.stop_thread(self.thread)
+            self.thread.join()
+        self.root.destroy()
+
+    def startThread(self):
+        self.baseinfo.disable()
+        self.backend.config.data["number"] = self.baseinfo.inputToInt(self.baseinfo.entry_number)
+        self.backend.config.data["totle"] = self.baseinfo.inputToInt(self.baseinfo.entry_total)
+        self.backend.config.data["no"] = self.baseinfo.inputToInt(self.baseinfo.entry_no)
+        self.backend.config.saveData()
+        self.backend.b = self.baseinfo.label_b.get()
+        self.backend.task = self.baseinfo.label_task.get()
+        self.thread = thread.TimmerThread(self.timmer, self.spiderstatus, self.backend)
+        self.thread.start()
+    def stopThread(self):
+        self.baseinfo.normal()
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e9096f5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,78 @@
+Web搜索技术 第一次作业 网站信息精准采集技术
+===
+
+## 前言
+
+姑且这就算做实验报告吧。首先由于被当年信通院的OJ的各种奇怪问题惊艳到而产生心理阴影，我希望我的程序可以被**人工审核**。
+
+## 需求分析
+
+网站信息精准采集程序的要求
+
+- [x] 采集想要的内容，不多不少不重复 ~ 完备性
+- [x] 对网站不构成负担 （性能压力不大）~ 轻量采集
+- [x] 出现异常情况 ~ 自行停止程序
+- [ ] 程序异常退出 ~ 自动重启
+- [x] 断点续采 ~ 鲁棒性
+- [x] 精准采集 ~ 正则表达式
+- [x] 采集过程信息及时展示 ~ 界面友好
+- [x] 采集结果实时存储 ~ 写文件
+- [x] 允许多个机器同时运行，采集不同的内容 ~ 并行性所有内容构成完备集。
+
+## 技术实现
+
+为了可以达到“界面友好”的需求，使用PyTk实现了一个GUI，因此整个程序分为两大部分：
+
+- UI： 负责处理GUI交互
+- Spider：负责爬虫相关逻辑
+
+程序运行时会涉及两个线程：
+
+- Mainloop：GUi主循环事件，处理点击以及页面绘制
+- TimmerThread：子进程，负责计时并发送网络请求
+
+为了降低代码耦合度，抽离如下模块：
+
+- errors.py 定义各种自定义错误
+- GUI.py 主要的GUI方面的代码，包括所有的子组件的实现
+- main.py 程序入口
+- spider.py 爬虫相关代码
+- thread.py 计时器子线程的代码，子线程中调用GUI相关组件更新状态
+- utils.py 包括正则匹配，格式化输入输出的一些工具类
+
+## 具体使用
+
+测试平台：Windows 10 专业版 1909 18363.752
+
+Pyhton版本：3.7.3
+
+安装依赖：
+
+```bash
+pip install -i requirements.txt
+```
+
+运行：
+
+```bash
+python main.py
+```
+
+填写学号并配置多机器(可选)，点击开始即可。
+
+中途可自由暂停、继续、停止、关闭窗口，基本不会引起文件保存错误，并且可以继续之前的进度进行爬取。
+
+个人认为程序异常退出还要重启有点问题，会导致程序无法正常关闭，无论如何关闭，对于程序来说都是发生了一个异常，所以无论如何都会重启，并非爬虫的本分，所以未作实现。
+
+由于本人是任务B，所以对于任务A的并未做任何实现，但是考虑到接口类似，仅仅声明了接口，如果需要可以对其进行实现即可
+
+
+## 目前的问题
+
+有一些符号例如'•'(\u2202)和' '(\xa0)不存在GBK对应符号，因此使用空格进行替换。
+
+这也是为什么我对于自动判别持怀疑态度。
+
+## 明知存在问题为什么还要早早交
+
+判别程序的问题不是我的责任，我认为我已经完成了规定的项目，我既然大晚上十分兴奋写完，一定要提交一下。见识一下自动判决会出什么问题。
\ No newline at end of file
diff --git a/errors.py b/errors.py
new file mode 100644
index 0000000..226809f
--- /dev/null
+++ b/errors.py
@@ -0,0 +1,27 @@
+class SpiderError(RuntimeError):
+    def __init__(self):
+        super(SpiderError, self).__init__()
+    def __str__(self):
+        return "一个未知的爬虫错误"
+
+class SpiderTaskTypeError(SpiderError):
+    def __init__(self, task):
+        super(SpiderTaskTypeError, self).__init__()
+        self.task = task
+    def __str__(self):
+        return "Task的类型: %s 不受支持" % self.task
+
+class SpiderNotFond(SpiderError):
+    def __init__(self, id):
+        super(SpiderNotFond, self).__init__()
+        self.id = id
+    def __str__(self):
+        return "id: %s 的页面并不存在" % str(self.id)
+
+class SpiderReFailed(SpiderError):
+    def __init__(self, id, error):
+        super(SpiderReFailed, self).__init__()
+        self.id = id
+        self.err = error
+    def __str__(self):
+        return "id: %s 的页面在正则识别id/title的时候出错, 具体错误如下:\n%s" % (str(self.id), str(self.err))
\ No newline at end of file
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..e9b4e04
--- /dev/null
+++ b/main.py
@@ -0,0 +1,13 @@
+#-*- coding: UTF-8 -*-
+__author__ = 'Xice <admin@xice.wang>'
+__data__ = '2020-03-24'
+
+import GUI
+import spider
+
+if __name__ == "__main__":
+    c = spider.CheckPointAndConfig("./config.json")
+    s = spider.Spider(c)
+    gui = GUI.MainGui(s)
+    gui.start()
+
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..8024749
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+requests==2.21.0
\ No newline at end of file
diff --git a/spider.py b/spider.py
new file mode 100644
index 0000000..e5a2648
--- /dev/null
+++ b/spider.py
@@ -0,0 +1,67 @@
+import requests
+import html
+import unicodedata
+from utils import ReForTaskB, ReForTaskA, OutPutFile, CheckPointAndConfig
+from errors import SpiderNotFond, SpiderTaskTypeError, SpiderReFailed
+class Spider():
+    headers = {
+        'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:22.0) Gecko/20100101 Firefox/22.0'
+    }
+    def __init__(self, config):
+        self.config = config
+        self.out = OutPutFile(config.data["outputFile"], "gbk")
+        self.b = 3
+        self.task = "B"
+    
+    def getOffset(self):
+        return self.config.data['checkpoint'] * self.config.data['totle'] + self.config.data['no'] - 1
+
+    urlTaskB = "https://win.bupt.edu.cn/program.do?id=%d"
+    staticReTaskB = ReForTaskB()
+    def _doOneStepOnTaskB(self):
+        pid = (self.b - 3) * 150 + 1 + self.getOffset()
+        r = requests.get(self.urlTaskB % pid, headers=self.headers)
+        text = html.unescape(r.text)
+        text = text.replace('\u2022', ' ').replace('\xa0', ' ')
+        # text = unicodedata.normalize('NFKD', text)
+        if '抱歉，没有该项目' in text:
+            raise SpiderNotFond(pid)
+        try:
+            res = self.staticReTaskB.search(text).display()
+            return res
+        except AttributeError as e:
+            raise SpiderReFailed(pid, e)
+    urlTaskA = "https://win.bupt.edu.cn/project.do?next=collectlist&p=%d"
+    staticReTaskA = ReForTaskA()
+    def _doOneStepOnTaskA(self):
+        pass
+    def doOneStep(self):
+        try:
+            if self.task == "B":
+                res = self._doOneStepOnTaskB()
+            else:
+                raise SpiderTaskTypeError(self.task)
+            self.out.write(res)
+            return res
+        finally:
+            self.config.data['checkpoint'] += 1
+            self.config.saveData()
+
+if __name__ == "__main__":
+    c = CheckPointAndConfig("./config.json")
+    s = Spider(c)
+    while True:
+        try:
+            res = s.doOneStep()
+            print(res)
+        except SpiderTaskTypeError as e:
+            print(str(e))
+            break
+        except SpiderReFailed as e:
+            print(str(e))
+            break
+        except SpiderNotFond as e:
+            print(str(e))
+        except Exception as e:
+            print("未知错误：\n" + str(e))
+            break
\ No newline at end of file
diff --git a/thread.py b/thread.py
new file mode 100644
index 0000000..93c02a5
--- /dev/null
+++ b/thread.py
@@ -0,0 +1,87 @@
+import threading
+import time
+from errors import SpiderTaskTypeError,SpiderNotFond,SpiderReFailed
+import inspect
+import ctypes
+def _async_raise(tid, exctype):
+    """raises the exception, performs cleanup if needed"""
+    tid = ctypes.c_long(tid)
+    if not inspect.isclass(exctype):
+        exctype = type(exctype)
+    res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))
+    if res == 0:
+        raise ValueError("invalid thread id")
+    elif res != 1:
+        # """if it returns a number greater than one, you're in trouble,
+        # and you should call it again with exc=NULL to revert the effect"""
+        ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None)
+        raise SystemError("PyThreadState_SetAsyncExc failed")
+def stop_thread(thread):
+    _async_raise(thread.ident, RuntimeError)
+class TimmerThread(threading.Thread):
+    def __init__(self, timmer, status, backend):
+        threading.Thread.__init__(self)
+        self._timmer = timmer
+        self._status = status
+        self._backend = backend
+        self._running = True
+    def terminate(self):
+        self._running = False
+    def timmer(self):
+        if self._running:
+            return self._timmer
+        else:
+            raise RuntimeError()
+    def status(self):
+        if self._running:
+            return self._status
+        else:
+            raise RuntimeError()
+    def backend(self):
+        if self._running:
+            return self._backend
+        else:
+            raise RuntimeError()
+    def run(self):
+        nowTime = 0.0
+        try:
+            while self._running and self.timmer().start:
+                if self.backend().getOffset() > self.timmer().maxoffset:
+                    self.timmer().progress_totle.setProgress(self.backend().getOffset()/self.timmer().maxoffset, str(self.backend().getOffset()))
+                    self.status().set("爬取结束")
+                    self.timmer().startStop()
+                    return
+                time.sleep(0.02)
+                if self.timmer().pause:
+                    continue
+                nowTime += 0.02
+                try:
+                    self.timmer().progress_each.setProgress(nowTime/self.timmer().sleeptime, str(round(nowTime,2)) + "s")
+                except ZeroDivisionError:
+                    self.timmer().progress_each.setProgress(1, str(round(nowTime,2)) + "s")
+                if nowTime > self.timmer().sleeptime:
+                    self.timmer().progress_totle.setProgress(self.backend().getOffset()/self.timmer().maxoffset, str(self.backend().getOffset()))
+                    nowTime = 0.0
+                    try:
+                        res = self.backend().doOneStep()
+                        self.status().set(res)
+                    except SpiderTaskTypeError as e:
+                        self.status().set(str(e))
+                        self.timmer().startStop()
+                        return
+                    except SpiderReFailed as e:
+                        self.status().set(str(e))
+                        self.timmer().startStop()
+                        return
+                    except SpiderNotFond as e:
+                        self.status().set(str(e))
+                    except UnicodeEncodeError as e:
+                        self.status().set("编码错误：\n" + str(e))
+                        self.timmer().startStop()
+                        return
+                    except Exception as e:
+                        self.status().set("未知错误：\n" + str(e))
+                        self.timmer().startStop()
+                        return
+        except RuntimeError:
+            return
\ No newline at end of file
diff --git a/utils.py b/utils.py
new file mode 100644
index 0000000..0e4c8f7
--- /dev/null
+++ b/utils.py
@@ -0,0 +1,87 @@
+import re
+import os
+import json
+class _resInTextForTaskB():
+    def __init__(self):
+        self.id = ""
+        self.title = ""
+        self.en_title = ""
+        self.college = ""
+        self.info = ""
+        self.source = ""
+    def __str__(self):
+        return self.display()
+    def display(self):
+        res = ""
+        res += "id:%s\n" % self.id
+        res += "title:%s\n" % self.title
+        res += "en_title:%s\n" % self.en_title
+        res += "college:%s\n" % self.college
+        res += "info:%s\n" % self.info
+        res += "source:%s" % self.source
+        return res
+
+class ReForTaskB():
+    reId = re.compile(r'"http://win\.bupt\.edu\.cn/program\.do\?id=(\d+)"')
+    reTitle = re.compile(r'<h2 style="display:inline">\s*(.*?)\s*</h2>')
+    reEnTitle = re.compile(r'<div style="margin-top:-7px;overflow: hidden;white-space: nowrap;text-overflow: ellipsis;">\s*(.*?)\s*</div>')
+    reCollege = re.compile(r'<h3 style="display:inline;">\s*(.*?)\s*</h3>')
+    reInfo = re.compile(r'<br>\s*<div style="font-size:17px;line-height:25px;">\s*(.*?)(\s*</div>){7}', re.S)
+    reSource = re.compile(r'\[\{"score":".*?","type":".*?","time":".*?","name":"(.*?)"\}')
+    def search(self, text):
+        res = _resInTextForTaskB()
+        res.id = self.reId.search(text).group(1)
+        res.title = self.reTitle.search(text).group(1)
+        try:
+            res.en_title = self.reEnTitle.search(text).group(1)
+        except AttributeError:
+            res.en_title = ""
+        try:
+            res.college = self.reCollege.search(text).group(1)
+        except AttributeError:
+            res.college = ""
+        try:
+            res.info = self.reInfo.search(text).group(1).replace("\r\n"," ").replace("\n"," ").replace("\r"," ")
+        except AttributeError:
+            res.info = ""
+        try:
+            res.source = self.reSource.search(text).group(1).encode('utf-8').decode('unicode_escape')
+        except AttributeError:
+            res.source = ""
+        return res
+
+class ReForTaskA():
+    def __init__(self):
+        pass
+
+class OutPutFile():
+    def __init__(self, fileName, encoding):
+        self.fileName = fileName
+        self.encoding = encoding
+    def write(self, text):
+        if os.path.exists(self.fileName):
+            text = "\n" + text
+        with open(self.fileName,mode='a',encoding=self.encoding) as f:
+            f.write(text)
+
+class CheckPointAndConfig():
+    def __init__(self, fileName):
+        self.fileName = fileName
+        self.data = {}
+        self.loadData()
+    def loadData(self):
+        if os.path.exists(self.fileName):
+            with open(self.fileName,'r') as load_f:
+                self.data = json.load(load_f)
+        else:
+            self.data = {
+                "number": 2017210281,
+                "outputFile": "out.txt",
+                "totle": 1,
+                "no": 1,
+                "checkpoint": 0
+            }
+            self.saveData()
+    def saveData(self):
+        with open(self.fileName,"w") as dump_f:
+            json.dump(self.data,dump_f)
\ No newline at end of file