Python 程序的运行时间需要 0.1 秒，慢了 100 倍，但由于 网络更慢，需要等待 1 秒，你想，用户能感觉到 1.001 秒和 1.1 秒的区 别吗？这就好比 F1 赛车和普通的出租车在北京三环路上行驶的道理一 样，虽然 F1 赛车理论时速高达 400 公里，但由于三环路堵车的时速只 有 20 公里，因此，作为乘客，你感觉的时速永远是 20 公里。 Python3 基础教程【完整版】 种参数都可以组合使用，除了可变参数 无法和命名关键字参数混合。但是请注意，参数定义的顺序必须是：必 选参数、默认参数、可变参数/命名关键字参数和关键字参数。 比如定义一个函数，包含上述若干种参数： def f1(a, b, c=0, *args, **kw): print('a =', a, 'b =', b, 'c =', c, 'args =', args, 'kw =', kw) def 参数传进去。 >>> f1(1, 2) a = 1 b = 2 c = 0 args = () kw = {} >>> f1(1, 2, c=3) a = 1 b = 2 c = 3 args = () kw = {} >>> f1(1, 2, 3, 'a', 'b') a = 1 b = 2 c = 3 args = ('a', 'b') kw = {} >>> f1(1, 2, 3, 'a'

print('Result: %s' % result.title) Parameters: classmethod search(term[, weights=None[, with_score=False[, score_alias='score'[, explicit_ordering=False]]]]) term (str) – Search term to use. weights – A list of name and mapped to a value. with_score – Whether the score should be returned as part of the SELECT statement. score_alias (str) – Alias to use for the calculated rank score. This is the attribute you will will use to access the score if with_score=True. explicit_ordering (bool) – Order using full SQL function to calculate rank, as opposed to simply referencing the score alias in the ORDER BY clause. Shorthand

print('Result: %s' % result.title) classmethod search(term[, weights=None[, with_score=False[, score_alias='score'[, explicit_ordering=False]]]]) Parameters: term (str) – Search term to use. weights name and mapped to a value. with_score – Whether the score should be returned as part of the SELECT statement. score_alias (str) – Alias to use for the calculated rank score. This is the attribute you will will use to access the score if with_score=True. explicit_ordering (bool) – Order using full SQL function to calculate rank, as opposed to simply referencing the score alias in the ORDER BY clause. Shorthand

print('Result: %s' % result.title) classmethod search(term[, weights=None[, with_score=False[, score_alias='score'[, explicit_ordering=False]]]]) Parameters: term (str) – Search term to use. weights name and mapped to a value. with_score – Whether the score should be returned as part of the SELECT statement. score_alias (str) – Alias to use for the calculated rank score. This is the attribute you will will use to access the score if with_score=True. explicit_ordering (bool) – Order using full SQL function to calculate rank, as opposed to simply referencing the score alias in the ORDER BY clause. Shorthand

print('Result: %s' % result.title) Parameters: classmethod search(term[, weights=None[, with_score=False[, score_alias='score'[, explicit_ordering=False]]]]) term (str) – Search term to use. weights – A list of name and mapped to a value. with_score – Whether the score should be returned as part of the SELECT statement. score_alias (str) – Alias to use for the calculated rank score. This is the attribute you will will use to access the score if with_score=True. explicit_ordering (bool) – Order using full SQL function to calculate rank, as opposed to simply referencing the score alias in the ORDER BY clause. Shorthand

query: print('Result: %s' % result.title) classmethod search(term[, weights=None[, with_score=False[, score_alias=’score’[, ex- plicit_ordering=False]]]]) Parameters • term (str) – Search term to use. 1 and mapped to a value. • with_score – Whether the score should be returned as part of the SELECT statement. • score_alias (str) – Alias to use for the calculated rank score. This is the attribute you will will use to access the score if with_score=True. • explicit_ordering (bool) – Order using full SQL function to calculate rank, as opposed to simply referencing the score alias in the ORDER BY clause.

query: print('Result: %s' % result.title) classmethod search(term[, weights=None[, with_score=False[, score_alias=’score’[, ex- plicit_ordering=False]]]]) Parameters • term (str) – Search term to use. • and mapped to a value. • with_score – Whether the score should be returned as part of the SELECT statement. • score_alias (str) – Alias to use for the calculated rank score. This is the attribute you will will use to access the score if with_score=True. • explicit_ordering (bool) – Order using full SQL function to calculate rank, as opposed to simply referencing the score alias in the ORDER BY clause.

query: print('Result: %s' % result.title) classmethod search(term[, weights=None[, with_score=False[, score_alias=’score’[, ex- plicit_ordering=False]]]]) Parameters • term (str) – Search term to use. • and mapped to a value. • with_score – Whether the score should be returned as part of the SELECT statement. • score_alias (str) – Alias to use for the calculated rank score. This is the attribute you will will use to access the score if with_score=True. • explicit_ordering (bool) – Order using full SQL function to calculate rank, as opposed to simply referencing the score alias in the ORDER BY clause.

finalize(self): return self.product # To use this aggregate: product = (Score .select(fn.product(Score.value)) .scalar()) unregister_aggregate(name): Unregister the given query: print 'match: ', doc.title classmethod search(term[, weights=None[, with_score=False[, score_alias='score']]]) Shorthand way of searching for a term and sorting results by the quality of the name and mapped to a value. with_score – Whether the score should be returned as part of the SELECT statement. score_alias (str) – Alias to use for the calculated rank score. This is the attribute you will

value def finalize(self): return self.product # To use this aggregate: product = (Score .select(fn.product(Score.value)) .scalar()) unregister_aggregate(name): Unregister the given aggregate function in query: print 'match: ', doc.title classmethod search(term[, weights=None[, with_score=False[, score_alias=’score’]]]) Shorthand way of searching for a term and sorting results by the quality of the mapped to a value. • with_score – Whether the score should be returned as part of the SELECT statement. 88 Chapter 1. Contents: peewee Documentation, Release 2.10.2 • score_alias (str) – Alias to use