python challenge

Python异常处理体系简介

Python 调用CAPICOM 读取 USB KEY数字证书

import win32com.client
store = win32com.client.Dispatch('CAPICOM.Store')
# 打开证书存储区
# 2 -> CAPICOM_CURRENT_USER_STORE
# 0 -> CAPICOM_STORE_OPEN_READ_ONLY
store.Open(2, "My", 0)
# 查找有效证书
# 12 -> CAPICOM_CERTIFICATE_FIND_KEY_USAGE
# 0x00000080 -> CAPICOM_DIGITAL_SIGNATU ......

初始化函数中的虚函数调用（ C++ vs python ）

代码+结果，不做解释
当然，对于python没有virtual function一说，估计当作对比一个例子看看吧。
#include <iostream>
using namespace std;
class base
{
public:
virtual void foo() { cout << "base" << endl; }
base() { foo() ;}
};
class derive: public base
{
pub ......

python绘制螺旋线

#coding=utf-8
from math import sqrt,cos,sin
import Image, ImageDraw
class SpireShape(object):
    def __init__(self, draw):
        self.draw = draw
        self.line_width = 1
     & ......