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decorators.py
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"""examples from sametmax"""
def benchmark(func):
"""
decorator to print function execution time
"""
import time
def wrapper(*args, **kwargs):
t = time.clock()
res = func(*args, **kwargs)
print(func.__name__, time.clock() - t)
return res
return wrapper
def logging(func):
"""
Un decorateur qui log l'activite d'un script.
(Ok, en vrai ça fait un print, mais ça pourrait logger !)
"""
def wrapper(*args, **kwargs):
res = func(*args, **kwargs)
print(func.__name__, args, kwargs)
return res
return wrapper
def counter(func):
"""
Un compter qui compte et affiche le nombre de fonction qu'une fonction
a ete executee
"""
def wrapper(*args, **kwargs):
wrapper.count = wrapper.count + 1
res = func(*args, **kwargs)
print("{0} a ete utilisee: {1}x".format(func.__name__, wrapper.count))
return res
wrapper.count = 0
return wrapper
@counter
@benchmark
@logging
def reverse_string(string):
return string[::-1]
print(reverse_string("Karine alla en Irak"))
print(reverse_string("Sa nana snob porte de trop bons ananas"))
## reverse_string ('Karine alla en Irak',) {}
## wrapper 0.000132
## wrapper a ete utilisee: 1x
## karI ne alla eniraK
## reverse_string ('Sa nana snob porte de trop bons ananas',) {}
## wrapper 0.000128
## wrapper a ete utilisee: 2x
## sanana snob port ed etrop bons anan aS
import httplib
@counter
@benchmark
@logging
def citation_de_futurama_au_hasard():
conn = httplib.HTTPConnection("slashdot.org:80")
conn.request("HEAD", "/index.html")
for key, value in conn.getresponse().getheaders():
if key.startswith("x-b") or key.startswith("x-f"):
return value
return "No, I'm ... doesn't!"
print(citation_de_futurama_au_hasard())
print(citation_de_futurama_au_hasard())