1 #encoding=utf-8  2   3 '''  4 用以下方法将参数设置成可选参数  5 *num: 结合成tuple  6 **num:结合成dict  7   8 入参检查：(异常处理、条件判断）  9     if isinstance(num1, int)  and isinstance(num2, string)  10 ''' 11 from test.test_socket import Urllib2FileobjectTest 12 from inspect import ArgInfo 13 def func_name(*num): 14     print type(num) 15     d = 0 16     for i in num: 17         d += i 18     return d 19  20 print  func_name(1,2,3,4,5,6,7,8) 21  22 ''' 23 a = sorted(sen, key=lambda k:len(k)) 24 命令行:pydoc Urllib2 25  26 Max_value = None; 27  28 def  func2(a, b, c, d): 29     """ 30     @a:说明参数a的类型 31     """ 32 使用断言：asset 33 print func2.__code__.co_filename 34 print func2.__code__.co_varnames 35 ''' 36  37 arg = 1 38 def func3(): 39     arg = 4 40  41 def func2(): 42      global arg  #指明该变量是全局变量 43      arg = 3 44   45  46 func3() 47 print arg 48  49 func2() 50 print arg 51  52 def func4(arg): 53     arg[0] = 5 54     return arg  55  56 tlist =[1, 2, 3] 57 print func4(tlist) 58  59 print tlist 60  61 """ 62 assert isinstance(lst, list), 'Premeter is list only' 63 lst = [s for s in os.listdir(path) if os.path.isdir('%s/%s'%(path, s))] 64 列表推导式 65 基本形式：[x for item in sequence 
     
      ], 这里x表示对item的操作， 66 """ 67  68 def func5(): 69     lst2 = [1,2, 4, 6, 9, 0, 3] 70     lst = [s for s in lst2 if s>5] 71     print lst 72      73 func5() 74  75 ''' 76 lambda表达式： 77     1、隐式return， 含有返回值 78     2、lambda一般运用于执行很小的功能，不能在里面使用条件语句 79 ''' 80  81 d = lambda x:x*2 if x>4 else "" 82 g = lambda x:[(x, i) for i in xrange(0, 10)] 83  84 print d(2) 85  86 print g(1) 87  88  89 ''' 90 filter 91  92 ''' 93 t = [1, 2, 3, 4, 5] 94 gg = filter(lambda x:x>3, t)  95  96 print gg 97  98 """ 99 *kargs 元组100 **kwargs 字典101 """102 103 def  func9(*kargs, **kwargs):104 #def  func9(a, *kargs, **kwargs):105     return kargs106 107 print func9(2, 3, 5, 6, [1, 2, 3, 4], {1:2, 3:4})