First eyes on Python

这一周，花了大概 4 天，简单学习了 Python 的基本语法，并在此基础上做了一个简单的 QQ 找茬外挂。在此做个记录。对了，我学的是 3.1 ，听说和以前的版本有比较大的区别，所以，以前版本的问题，本人概不清楚。

一，语法篇

做为一名 C 家族语言编码者，分析一下 Python 的特点吧。

1 ， 结构： Python 的代码结构，不是通过结束符，而是纯粹依靠缩进。所以，忘掉分号，忘掉括号，保持你的良好缩进结构。至于是 tab 还是 space ，就看你自己了，所以假如没有处理好这个，代码还是很难看，即便强制了使用缩进作为语句分隔符。

2 ， 类型： Python 的动态类型，所谓的运行时类型加载。对于一个变量，不用声明是什么类型，直接对其赋值就可以了。在程序运行的时候，就可以确定这个变量对应的是什么类型。是不是有点像薛定谔的猫呢？貌似混沌，其实清楚。

3 ， 就没有了，其他的东西初步感觉都是常规语法。不多说。而且自己只是看了两三天而已。不过，作为一种动态语言，学习 Python 应该可以从中体悟到一些 C 、 C++ 没有的东西。

至于找茬的外挂原理，大家应该都很清楚，把屏幕的图片截下来，然后把左右两幅图片进行简单的像素对比，就知道什么地方是不一样的。好像这里不能传附件，贴代码么

#coding=utf-8 import win32gui, win32ui, win32con from tkinter import * class ZhaochaHacker: def __init__(self): self.picWidth = 503 self.picHeight = 452 self.pic1Left = 6 self.pic1Top = 190 self.pic2Left = 515 self.pic2Top = 190 def find_zhaocha_window(self): hwnd = {} win32gui.EnumWindows(self.callback_find_zhaocha_window, hwnd) return hwnd def callback_find_zhaocha_window(self, hwnd, resultHwnd): windowTitle = win32gui.GetWindowText(hwnd) zhaochaTitle = "找茬" index = windowTitle.find(zhaochaTitle) if index != -1: resultHwnd[windowTitle] = hwnd return false def window_capture(self, hwnd): try: hwndDC = win32gui.GetWindowDC(0) mfcDC=win32ui.CreateDCFromHandle(hwndDC) saveDC=mfcDC.CreateCompatibleDC() self.savedLeftBitMap = win32ui.CreateBitmap() self.savedRightBitMap = win32ui.CreateBitmap() (self.left, self.top, right, bottom) = win32gui.GetWindowRect(hwnd) self.savedLeftBitMap.CreateCompatibleBitmap(mfcDC, / self.picWidth, self.picHeight) self.savedRightBitMap.CreateCompatibleBitmap(mfcDC, / self.picWidth, self.picHeight) leftPicLeft = self.left + self.pic1Left leftPicTop = self.top + self.pic1Top saveDC.SelectObject(self.savedLeftBitMap) saveDC.BitBlt((0, 0),(self.picWidth, self.picHeight) , mfcDC, / (leftPicLeft, leftPicTop), win32con.SRCCOPY) rightPicLeft = self.left + self.pic2Left rightPicTop = self.top + self.pic2Top saveDC.SelectObject(self.savedRightBitMap) saveDC.BitBlt((0, 0),(self.picWidth, self.picHeight) , mfcDC, / (rightPicLeft, rightPicTop), win32con.SRCCOPY) except win32ui.error: pass print(hwnd) print(bmp1name) print(bmp2name) return bmp1name def get_diff(self): hwndDC = win32gui.GetWindowDC(0) mfcDC = win32ui.CreateDCFromHandle(hwndDC) saveDC=mfcDC.CreateCompatibleDC() diffBitmap = win32ui.CreateBitmap() diffBitmap.CreateCompatibleBitmap(mfcDC, self.picWidth, self.picHeight) saveDC.SelectObject(diffBitmap) leftPicLeft = self.left + self.pic1Left leftPicTop = self.top + self.pic1Top saveDC.SelectObject(self.savedLeftBitMap) saveDC.BitBlt((0, 0),(self.picWidth, self.picHeight) , mfcDC, / (leftPicLeft, leftPicTop), win32con.SRCCOPY) bmp1Bits = self.savedLeftBitMap.GetBitmapBits(False) bmp2Bits = self.savedRightBitMap.GetBitmapBits(False) totalPixels = len(bmp1Bits) p = 0 for pixel in bmp1Bits: if p >= totalPixels: break if bmp1Bits[p] != bmp2Bits[p] or bmp1Bits[p+1] != bmp2Bits[p+1] / or bmp1Bits[p+2] != bmp2Bits[p+2] or bmp1Bits[p+3] != bmp2Bits[p+3]: x = (p//4) % self.picWidth# + self.left + self.pic1Left y = (p//4) // self.picWidth# + self.top + self.pic1Top try: saveDC.SetPixel(x, y, 2000) except win32ui.error: print(p) break except IndexError: print(p) p = p+4 return saveDC def get_hack_DC(self): resultHwnds = self.find_zhaocha_window() for key in resultHwnds: hwnd = resultHwnds[key] imageName = self.window_capture(hwnd) saveDC = self.get_diff() return saveDC class Application(Frame): def hack(self): if self.drawId != 0: self.after_cancel(self.drawId) self.after(100, self.get_hack) def get_hack(self): self.saveDC = self.t.get_hack_DC() self.drawId = self.after(100, self.drawDiff) def drawDiff(self): hwndDC = win32gui.GetWindowDC(0) mfcDC = win32ui.CreateDCFromHandle(hwndDC) mfcDC.BitBlt((self.t.left + self.t.pic1Left, self.t.top + self.t.pic1Top),/ (self.t.picWidth, self.t.picHeight) , self.saveDC, / (0, 0), win32con.SRCCOPY) self.drawId = self.after(10, self.drawDiff) def undraw(self): if self.drawId != 0: self.after_cancel(self.drawId) def createWidgets(self): self.QUIT = Button(self) self.QUIT["text"] = "QUIT" self.QUIT["fg"] = "red" self.QUIT["command"] = self.quit self.QUIT.pack({"side": "left"}) self.hackButton = Button(self) self.hackButton["text"] = "hack", self.hackButton["command"] = self.hack self.hackButton.pack({"side": "left"}) self.drawButton = Button(self) self.drawButton["text"] = "undraw", self.drawButton["command"] = self.undraw self.drawButton.pack({"side": "left"}) def __init__(self, master=None): Frame.__init__(self, master) self.t = ZhaochaHacker() self.pack() self.createWidgets() self.drawId = 0 root = Tk() app = Application(master=root) app.mainloop() root.destroy()