decorators in python

1'pass function which we want to decorate in decorator callable object'
2def our_decorator(func):  # func is function to be decorated by decorator
3  
4  def wrapper(x):       # x is parameter which is passed in func
5    if x%2==0:
6      return func(x)
7    else:
8      raise Exception("number should be even")
9  return wrapper
10
11@ our_decorator
12def func(x):         # actual function 
13  print(x,"is even")
14func(2)
15func(1)
16
17' if you do not want to use @'
18func=our_decorator(func)
19func(2)
20
21
22  
23  

1# This function take input from user and return
2# list of 0 and 1, zero represents odd number
3# and 1 represents even number
4def deco(func):
5    def wrap(lst):
6        x = [1 if i % 2 == 0 else 0 for i in lst]
7        return x
8        func(lst)
9    return wrap
10
11@deco   
12def display(l):
13    return (l)
14
15a = [int(x) for x in input("Enter number of elements : ").split(",")]
16print(display(a))

1def deco(function):
2    def wrap(num):
3        if num % 2 == 0:
4            print(num,"is even ")
5        else:
6            print(num,"is odd")
7        function(num)
8    return wrap
9    
10@deco
11def display(num):
12    return num
13display(9)   # pass any number to check whether number is even or odd

1#This function take user input for list and returns a tuple cotaining 2 lists
2#one of even numbers another of odd numbers
3def deco(function):
4    def wrap(lst):
5        even = []
6        odd = []
7        for i in lst:
8            if i % 2 == 0:
9                even.append(i)
10            else:
11                odd.append(i)
12        return even,odd
13        function(lst)
14    return wrap
15
16@deco
17def display(lst):
18    print(lst)
19
20
21a = [int(x) for x in input("Enter number of elements : ").split(",")]
22print(display(a))
23

1# this functon converts any string into uppercase
2def deco(function):
3    def wrap(s):
4        return s.upper()
5        function(s)
6    return wrap
7
8@deco
9def display(s):
10    return s 
11print(display("not bad"))

1def deco(func):
2    def wrap(s):
3        d = {}
4        for i in s:
5            d[i] = s.count(i)
6        func(s)
7        return d
8    return wrap
9
10@deco
11def count(stng):
12    return stng
13mystring = "scorpio"  
14print(count(mystring))