# python:函数说明500万彩票网app下载

### 布局参数

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python在参数名以前运用2个星号来支撑放肆多的怜惜字参数。

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python把参数搜罗到多少个元组中，作为变量args。显式注脚的参数之外若无地点参数，那些参数就充作贰个空元组。

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>>> add(x=1)         # x=1 => kwargs={'x': 1}

csdn上的牛人正是多，加油

...     print x + y + z

>>> def accept(**kwargs):
... for keyword, value in kwargs.items():
... print "%s => %r" % (keyword, value)
...
>>> accept(foo='bar', spam='eggs')
foo => 'bar'
spam => 'eggs'

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... for k, v in kwargs.items():

>>> def multiply(*args):
... total = 1
... for arg in args:
... total *= arg
...
>>> multiply(2, 3)
6
>>> multiply(2, 3, 4, 5, 6)
720

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——————————————————————————

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def complex_function(a, b=None, *c, **d):

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>>> add(1)          # 传递 1 个参数

1）必得的参数
2）可选的参数
3）过量的地点参数
4）过量的尤为重要字参数

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... return a + b + c
...
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>>> args = (2, 3)
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>>> kwargs={'b': 8, 'c': 9}
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Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: add() got multiple values for keyword argument 'a'
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: add() got multiple values for keyword argument 'a'

y = 2

File "", line 1, in

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...    sum += v

args = (4, 5)

...     return sum

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SyntaxError: non-default argument follows default argument

... sum = 0

z = 3

...

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>>> add(1, 2, 3)            # 1+2+3

File "", line 1, in

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>>> a = [1, 2]

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>>> def sum(**kwargs):               # 函数参数是主要字参数

>>> a = (1, 2, 3)

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2016-12-01

print 'x =', x

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>>> add_to_list(['a', 'b', 'c'])    # 没啥难点

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... return sum

z = 3

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...

z = 3

args = ()

['a', 'b', 'c', 'END']

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x = 1

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>>> def add(x, y):        # x, y 是必选参数

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...     for i in numbers:

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args = ()

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...    sum += i

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{'y': 2, 'x': 1}

return kwargs

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>>> add(1, 2, 3)    # 传递 3 个参数

...     return x + y + z

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>>> def add(x, y=1, z):      # y 是暗许参数，必须放在全部必选参数的末端

...     return x + y + z

{'x': 1}

TypeError: add() takes exactly 2 arguments (0 given)

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>>> add(*a)                  # 使用 *a 给函数字传送递参数

...     sum = 0

>>>

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[1, 2, 3, 'END']

print 'z =', z

>>> def add(x=1, y, z):      # x 是默许参数，必需放在全部必选参数的末尾

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z = 0

args = (4, 5, 6)

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Traceback (most recent call last):

z = 3

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>>> func(1, 2, 4, u=6, v=7)        # args = (), kwargs = {'u': 6, 'v': 7}

kwargs = {'u': 6, 'v': 7}

kwargs = {'u': 6, 'v': 7}

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*args 表示可变参数，**kwargs 代表关键字参数。

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...     return L

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args 和 *kwargs · Python进阶

kwargs = {}

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>>> add_to_list([1, 2, 3])          # 没啥难点

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>>> add()           # 传递 0 个参数

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File "", line 1

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numbers: (1, 2, 3)

>>> b = (4, 5, 6)

y = 2

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y = 2

>>> dict2 = {'x': 2, 'y': 6}

>>> add(a, a, a)    # 那样传递参数很麻烦

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Traceback (most recent call last):

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>>> func(1, 2)                     # 至少提供四个参数，因为 x, y 是必选参数

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>>> a = [1, 2, 3, 4]

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... return sum

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numbers: (1,)

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TypeError: add() takes exactly 2 arguments (1 given)

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kwargs = {'u': 6, 'v': 7}

...

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>>> add(1, 2)       # 传递 2 个参数

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>>> add(1, 2)               # 未有传递 z，自动使用 z=1，即 1+2+1

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>>> add(x=1, y=2)    # x=1, y=2 => kwargs={'y': 2, 'x': 1}

['END']

x = 1

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print 'y =', y

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>>> add(**dict1)        # 使用 **dict1 来传参，等价于上边的做法

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...     print 'numbers:', numbers

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...

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y = 2

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*args 和 **kwargs 是 Python 的惯用写法。

... return x + y + z

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...     L.append('END')

y = 2

['END', 'END']

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>>> func(1, 2, 3, 4, 5, 6)         # x=1, y=2, z=3, args=(4, 5, 6), kwargs={}

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...

>>> dict1 = {'z': 3, 'x': 1, 'y': 6}

>>> def func(x, y, z=0, *args, **kwargs):

Python: 函数参数法力

>>> func(1, 2, 3, 4, 5, u=6, v=7)   # args = (4, 5), kwargs = {'u': 6, 'v': 7}

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x = 1

print 'kwargs =', kwargs

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print 'args =', args

x = 1

...     print x + y

>>> sum(**dict1)                     # 相当于 sum(x=1)

x = 1

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numbers: ()

... for i in numbers:

SyntaxError: non-default argument follows default argument

['END', 'END', 'END']

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numbers: (1, 2)

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... return x + y + z

>>> a = [1, 2, 3]

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...

>>> dict1 = {'x': 1}

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>>> sum()                            # 未有参数

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...

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kwargs = {}

... sum = 0

args = ()

args = ()

kwargs = {}

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>>> def add(x, y, z=1):     # x, y 是必选参数，z 是暗许参数，暗许值是 1

z = 4

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>>> sum(**dict2)                     # 相当于 sum(x=2, y=6)

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>>> func(1, 2, 3)                  # x=1, y=2, z=3

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python:函数说明500万彩票网app下载。>>> func(*a, **b)

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>>> b = {'u': 6, 'v': 7}

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y = 2

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x = 1

...         sum += i

File "", line 1

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>>> def add(x, y, z):        # 有 3 个必选参数

>>> add(dict1['x'], dict1['y'], dict1['z'])    # 那样传参很麻烦

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{}

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{"ft_lang_label":"__label__zh","ft_lang_prob":0.61004233,"math_prob":0.9920983,"size":7170,"snap":"2020-34-2020-40","text_gpt3_token_len":4774,"char_repetition_ratio":0.13201228,"word_repetition_ratio":0.0761062,"special_character_ratio":0.42217574,"punctuation_ratio":0.22073579,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9915834,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-09-23T12:03:54Z\",\"WARC-Record-ID\":\"<urn:uuid:cb679458-47ad-4bf6-ae0b-1ddafc5a3d51>\",\"Content-Length\":\"22966\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:bdacad43-6e40-4401-824a-71a59b431c29>\",\"WARC-Concurrent-To\":\"<urn:uuid:4329bf7f-e3a9-4e9f-b68d-8052c21d5b07>\",\"WARC-IP-Address\":\"154.201.145.231\",\"WARC-Target-URI\":\"http://www.coffee888.net/500wancaipiaowangappxiazai/1237.html\",\"WARC-Payload-Digest\":\"sha1:M4I65DN62RIFESRJQC6QPKJOY437EODU\",\"WARC-Block-Digest\":\"sha1:OZC6UKJ7PQCOMSP5GRTFBBAR55USBZBL\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-40/CC-MAIN-2020-40_segments_1600400210996.32_warc_CC-MAIN-20200923113029-20200923143029-00782.warc.gz\"}"}