55 lines
1.1 KiB
Python
55 lines
1.1 KiB
Python
# encoding: utf-8
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"""
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Topic: sample
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Desc : 利用闭包演示带参的装饰器，错误示范
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"""
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from time import time
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__author__ = 'Xiong Neng'
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def logged(when):
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def log(f, *args, **kargs):
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print('Called: function: %s, args: %r, kargs: %r' % (f, args, kargs))
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def pre_logged(f, *args, **kargs):
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log(f, *args, **kargs)
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return f(*args, **kargs)
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def post_logged(f, *args, **kargs):
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now = time()
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try:
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return f(*args, **kargs)
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finally:
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log(f, *args, **kargs)
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print('time delta: %s' % (time() - now))
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try:
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return {'pre': pre_logged, 'post': post_logged}[when]
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except KeyError as e:
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raise ValueError(e, 'must be "pre" or "post"')
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@logged('post')
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def hello(name):
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print('Hello', name)
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hello(*('World!',))
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def printparams(a, b, c, d, e=12):
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print((a, b, c, d, e))
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def callParams(f):
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return lambda *a, **b: f(*a, **b)
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def callParams2(f, *a, **b):
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print('len: ', len(a))
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return f(*a, **b)
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callParams(printparams(1, *(2, 3), **{'d': '33', 'e': 333}))
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callParams2(printparams, 1, *(2, 3), **{'d': '33', 'e': 333}) |