Python built-in && recursive

Lambda

Advantages:

1: Can simply use a script instead of our function

2: Do not consider the problem of naming

3: Simplify the readability of your code without jumping to def, eliminating the need for such a step

Built-in functions: BIF

Filter: Filters

Map: Map

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 1 >>> lambda x: 2*x+1 2 <function <lambda> at  0x00000000026C6AC8> 3 >>> g=lambda x: 2*x+1 4 >> > g (3)  5 7 6 >>> help (filter)  7 help on built-in  function filter in module __builtin__: 8  9 filter (...) 10     filter (function or none, sequence)  -> list,  Tuple, or string11     12     return those  items of sequence for which function (item)  is true.  if13      function is none, return the items that are  true.  If sequence is a tuple14     or  String, return the saMe type, else return a list.15 16 >>> filter (None,[1,0,True, False]) 17 [1, true]18 >>> 19 >>> 20 >>> tmp =range (21 >>> tmp22 [0, 1, 2, 3, 4, 5, 6, 7),  8, 9]23 >>> def fun (x): 24     return x%225  26 >>> filter (fun,tmp) 27 [1, 3, 5, 7, 9]28 >>>  list (Filter (lambda x:x%2,range)) 29 [1, 3, 5, 7, 9]30 >>>  list (Map (lambda x:x*2,range)) 31 [0, 2, 4, 6, 8, 10, 12,  14, 16, 18]32 >>>

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Recursive

Python limits the recursion depth to about hundreds of levels, but can be set manually

"" Import sys

>>> Sys.setrecursionlimit (10000)

Python---------------------------------------eg ' 1------------------

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Python built-in && recursive