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examples of function decorators in Python

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Vast Vulture answered on December 29, 2020 Popularity 10/10 Helpfulness 2/10

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examples of function decorators in Python

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from functools import wraps

def logit(func):
    @wraps(func)
    def with_logging(*args, **kwargs):
        print(func.__name__ + " was called")
        return func(*args, **kwargs)
    return with_logging

@logit
def addition_func(x):
   """Do some math."""
   return x + x


result = addition_func(4)
# Output: addition_func was called

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Source: book.pythontips.com

Tags: function python

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Contributed on Dec 29 2020

Vast Vulture

0 Answers Avg Quality 2/10

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decorators in python

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def deco(function):
    def wrap(num):
        if num % 2 == 0:
            print(num,"is even ")
        else:
            print(num,"is odd")
        function(num)
    return wrap
    
@deco
def display(num):
    return num
display(9)   # pass any number to check whether number is even or odd

Popularity 10/10 Helpfulness 3/10 Language python

Source: Grepper

Tags: python py

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Contributed on Jun 25 2021

King Generous

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decorators in python

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# this functon converts any string into uppercase
def deco(function):
    def wrap(s):
        return s.upper()
        function(s)
    return wrap

@deco
def display(s):
    return s 
print(display("not bad"))

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Source: Grepper

Tags: python py

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Contributed on Jun 25 2021

King Generous

0 Answers Avg Quality 2/10

examples of function decorators in Python

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from functools import wraps

def logit(logfile='out.log'):
    def logging_decorator(func):
        @wraps(func)
        def wrapped_function(*args, **kwargs):
            log_string = func.__name__ + " was called"
            print(log_string)
            # Open the logfile and append
            with open(logfile, 'a') as opened_file:
                # Now we log to the specified logfile
                opened_file.write(log_string + '\n')
            return func(*args, **kwargs)
        return wrapped_function
    return logging_decorator

@logit()
def myfunc1():
    pass

myfunc1()
# Output: myfunc1 was called
# A file called out.log now exists, with the above string

@logit(logfile='func2.log')
def myfunc2():
    pass

myfunc2()
# Output: myfunc2 was called
# A file called func2.log now exists, with the above string

Popularity 9/10 Helpfulness 2/10 Language python

Source: book.pythontips.com

Tags: function functio

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Contributed on Dec 29 2020

Vast Vulture

0 Answers Avg Quality 2/10

Decorators in python

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# decorator function to convert to lowercase
def lowercase_decorator(function):
   def wrapper():
       func = function()
       string_lowercase = func.lower()
       return string_lowercase
   return wrapper
# decorator function to split words
def splitter_decorator(function):
   def wrapper():
       func = function()
       string_split = func.split()
       return string_split
   return wrapper
@splitter_decorator # this is executed next
@lowercase_decorator # this is executed first
def hello():
   return 'Hello World'
hello()   # output => [ 'hello' , 'world' ]

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Source: www.interviewbit.com

Tags: python py

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Contributed on May 30 2022

Rakesh Meher

0 Answers Avg Quality 2/10

Decorators in python

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# decorator function to convert to lowercase
def lowercase_decorator(function):
   def wrapper():
       func = function()
       string_lowercase = func.lower()
       return string_lowercase
   return wrapper
# decorator function to split words
def splitter_decorator(function):
   def wrapper():
       func = function()
       string_split = func.split()
       return string_split
   return wrapper
@splitter_decorator # this is executed next
@lowercase_decorator # this is executed first
def hello():
   return 'Hello World'
hello()   # output => [ 'hello' , 'world' ]

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Source: www.interviewbit.com

Tags: python py

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Contributed on May 30 2022

Rakesh Meher

0 Answers Avg Quality 2/10

when to use decorators in python

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#using decorators to add or modify class methods
class MyClass:
    def __init__(self):
        self._x = None

    @property
    def x(self):
        """I'm the 'x' property."""
        return self._x

    @x.setter
    def x(self, value):
        self._x = value

    @x.deleter
    def x(self):
        del self._x

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Tags: python when

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Contributed on Jan 20 2023

Nithish Soorya

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decorators in python

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# Python program to illustrate functions
# Functions can return another function
 
def create_adder(x):
    def adder(y):
        return x+y
 
    return adder
 
add_15 = create_adder(15)
 
print(add_15(10))

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Source: www.geeksforgeeks.org

Tags: python py

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Contributed on Oct 03 2023

Joyous Jaguar

0 Answers Avg Quality 2/10

examples of function decorators in Python

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