cs MIT 6.0001 计算机科学导论与Pyhon编程基础
                       #1.课程的syllabus 
                       课程总共分为12小节
                       ##1.what is computation                                                 Pset 0 released
                         2.Branch and iteration                                                Pset 1 released
                         3.String Manipulation, Guess and Check, Approximations, Bisection
                         4.Decomposition, Abstractions, Functions
                         5.Tuples, Lists, Aliasing, Mutability, Cloning
                         6.Recursion, Dictionaries
                         7.Testing, Debugging, Exceptions, Assertions