Python decorator introduction

decorator don gian.py

__author__ = 'bluzky'

def name_decorator(f):
    def wrapper(ten):
        chuoi_moi = "Ten tui la %s" % ten
        return f(chuoi_moi)
    return wrapper

# su dung decorator
@name_decorator
def xuat_ten(ten):
   print ten

xuat_ten('Coulson')

# khong su dung decorator
def xuat_ten_2(ten):
    print ten

ham_xuat_ten_moi = name_decorator(xuat_ten_2)
ham_xuat_ten_moi('Coulson')

decorator truyen tham so.py

def chuc_danh_decorator(ten_chuc_danh):
    def ten_decorator(f):
        def wrapper(ten):
            chuoi_moi = "Xin gioi thieu %s %s" % (ten_chuc_danh, ten)
            return f(chuoi_moi)
        return wrapper
    return ten_decorator
@chuc_danh_decorator("Giao su")
def gioi_thieu(ten):
print ten

@chuc_danh_decorator("Tien si")
def gioi_thieu_2(ten):
print ten

gioi_thieu("Teo") #Xin gioi thieu Giao su Ti
gioi_thieu_2("Ti") #Xin gioi thieu Tien si Teo

su dung functool lib.py

from functools import wraps
def ten_decorator(f):
    @wraps(f)
    def wrapper(ten):
        chuoi_moi = "Ten tui la %s" % ten
        return f(chuoi_moi)
    return wrapper

def xuat_ten( ten ):
    print ten

print xuat_ten.__name__