C # program Ape Learning Python

Sun Guangdong 2016.1.1

Interaction:

C # runs Python code:

Http://stackoverflow.com/questions/11779143/run-a-python-script-from-c-sharp

The reverse comes:

Http://stackoverflow.com/questions/3260015/run-a-c-sharp-application-from-python-script

Features of the Python language:
Advanced language
Built-in battery (a large number of standard libraries)
interpreted (sometimes JIT-compiled)
Object-oriented (especially Python 3)
Strongly typed dynamic semantics
Grammar emphasizes readability
Supports reuse through modules and packages

The "shape" of the Python program:
Python defines a block of code ( using spaces and colons in Python).

Look at a Demo:

Import Randomdef get_days ():    # list<string> days = new list<sting> ();    # days[] Days    = [' mon ', ' Tues ', ' Wed ', ' Thurs ', ' Fri ', ' sat ', ' Sun ']    return daysdef get_random_report ():    Weather = [' Sunny ', ' lovely ', ' cold ']    return weather[random.randint (0, Len (weather)-1)]def main (): Days    = Get_d Ays () for Day in days    : report        = Get_random_report ()        print ("on {0} it'll be {1}.") Format (day, report)) If __name__ = = "__main__":    Main ()

What does C # have?

Everything is an object (all objects)

C#:

Class document:object{public    void Serialize ()    {        //...    }    public override string ToString ()    {        return ' I am a document ';    }}

Python:

Class Document (object):    def serialize (self):        print ("Great!") ")    def __str__ (self):        return" I am a document. "

Second, IEnumerable + foreach Loops

C#:

        int[] numbers = new[] {1, 2, 3, 4, 5, 6};        foreach (var n in numbers)        {            Console.Write (n + ",");        }

Class shoppingcart:ienumerable<tuple<string, float>>{    list<tuple<string, float>>  Cartitems = new list<tuple<string, float>> ();    public void Add (string name, float price)    {        cartitems.add (new tuple<string, float> (name, Price));    } Public    ienumerator<tuple<string, float>> GetEnumerator ()    {        return cartitems.getenumerator ();    }    IEnumerator Ienumerable.getenumerator ()    {        return cartitems.getenumerator ();    }}

Python:

numbers = [1, 2, 3, 4, 5, 6]for N in numbers:    print (n, end= ', ') for V in Enumerate (numbers):    print (V, end= ', ') for I Ndex, K in Enumerate (numbers):    print (k, end= ', ')

Class Caritem:    def __init__ (self, Name, price):        self.price = Price        Self.name = name    def __repr__ (self):        return "({0}, ${1})". Format (Self.name, Self.price)class ShoppingCart:    def __init__ (self):        self.__ Items = []    def add (self, cart_item):        self.__items.append (Cart_item)    def __iter__ (self):        return self.__items.__iter__ ()print () print () cart = ShoppingCart () cart.add (Caritem ("CD", 19.99)) Cart.add (Caritem (" Record ", 17.99))) for item in Cart.items:    print (item)

Iii. Properties (int age {get; set;} ）

C#:

    Class ShoppingCart    {        list<tuple<string, float>> cartitems = new list<tuple<string, float >> ();        Public float totalprice        {            get            {                float total = 0;                foreach (var item in Cartitems)                {Total                    + = Item. Item2;                }                return total;}}    }

Python:

Class ShoppingCart:    @property    def total_price (self): total        = 0.0 to        item in Self.__items: Total            + = Item.price        return total

Print ("Total Price is ${0:,}". Format (cart.total_price))

Iv. Anonymous types (anonymous type)

C#:

    public static void Main (string[] args)    {        var o = new        {            Id = 2,            registered = True        };        Console.WriteLine (o);        if (o.registered)        {            Console.WriteLine ("They is registered ...");}    }

Python:

Class Anonobject (dict):    __getattr__ = dict.get    __setattr__ = Dict.__setitem__person = {    "name": " Michael ",    " age ": 40}anonperson = anonobject (name =" Michael ", age=40) print (Anonperson) print (anonperson[" name "]) Print (anonperson.name) print (anonperson.age)

Five, Lambda expressions

C#:

    private static ienumerable<int> findnumbers (predicate<int> predicate)    {for        (int i = 0; i <; i+ +)        {            if (predicate (i))            {                yield return i;            }        }    }    Private ienumerable<int> nums = findnumbers (n = n%11 = = 0);    [0, 11,22,33,44,55,66,77,88,99]

Python:

def get_numbers (limit, predicate):    for N in range (0, limit):        if predicate (n):            yield ndef divide_by_ll (n) :    return n = = = 0output = List (Get_numbers (DIVIDE_BY_LL)) print (output)

def get_numbers (limit, predicate):    for N in range (0, limit):        if predicate (n):            yield n# def divide_by_ll (n): #     return n% = = 0output = List (Get_numbers (40,lambda n-==0) print (output)

VI. NuGET Package Management

Vii. Entity Framework "ORMs

Viii. ASP. NET MVC

Ix. LINQ

C#:

        var older = from            p in people             where P.age >            the p.age descending             {age = p.age, name = P . Name}

Python:

Class Person:    def __init__ (self, name, age, Hobby):        self.hobby = hobby        self.name = name        Self.age = Age
   def __repr__ (self):        return ' {0} is {1} and likes {2} '. Format (Self.name, Self.age, Self.hobby) class Anonobject (Dict ):    __getattr__ = dict.get    __setattr__ = dict.__setitem__people = [Person    ("Jeff", "biking"),    Person ("Michael", "Max", "biking"), person ("    saerh", "Running"), Person    ("Tony", "Jogging"    ), Person ("Zoe", "V", "TV"),]bikers = [    anonobject(Name = p.name, pasttime = p.hobby) for    p in PEOPLE
   if P.hobby = = "Biking"]bikers.sort (Key=lambda p:p.name) for B in Bikers:    print (b)

Ten, Iterator Methods/yield return

C#:

    private static ienumerable<int> Fibonaccigenerator ()    {        int current = 1;        int next = 1;        yield return current;        while (true)        {            int temp = current + next;            current = next;            Next = temp;            yield return current;        }    }

Python:

Def fibinnoci (): Current    = 0    NXT = 1    and True: current        , NXT = NXT, current + NXT        #print ("genera Ting "+ str"        yield  currentfor N in Fibinnoci ():    if n > £ º break    print (n, end= ', '    # 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144,

Xi. JIT Compilation

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C # program Ape Learning Python