python之迭代器和生成器，,代码: 1 # x

python之迭代器和生成器，,代码: 1 # x

代码:

  1 # x=‘hello‘  2 # # print(dir(x))  3 # iter_test=x.__iter__()  4 #  5 # # print(iter_test)  6 # print(iter_test.__next__())  7 # print(iter_test.__next__())  8 # print(iter_test.__next__())  9 # print(iter_test.__next__()) 10 # print(iter_test.__next__()) 11  12 # 13 l=[1,2,3] 14 # for i in l:  #i_l=l.__iter_()  i_l.__next__() 15 #     print(i) 16  17 # index=0 18 # while index < len(l): 19 #     print(l[index]) 20 #     index+=1 21  22  23 # iter_l=l.__iter__() #遵循迭代器协议，生成可迭代对象 24 # print(iter_l.__next__()) 25 # print(iter_l.__next__()) 26 # 27 # for i in l: 28 #     print(i) 29  30 # s={1,2,3} 31 # 32 # # for i in s: 33 # #     print(i) 34 # iter_s=s.__iter__() 35 # print(iter_s) 36 # print(iter_s.__next__()) 37 # print(iter_s.__next__()) 38 # print(iter_s.__next__()) 39 # print(iter_s.__next__()) 40  41 # dic={‘a‘:1,‘b‘:2} 42 # iter_d=dic.__iter__() 43 # print(iter_d.__next__()) 44  45 # f=open(‘test11.py‘,‘r+‘) 46 # # for i in f: 47 # iter_f=f.__iter__() 48 # print(iter_f) 49 # # print(iter_f.__next__(),end=‘‘) 50 # print(iter_f.__next__(),end=‘‘) 51 # l=[1,2,3,4,5] 52 # diedai_l=l.__iter__() 53 # while True: 54 #     try: 55 #         print(diedai_l.__next__()) 56 #     except StopIteration: 57 #         # print(‘迭代完毕了,循环终止了‘) 58 #         break 59  60 # l=[‘die‘,‘erzi‘,‘sunzi‘,‘chongsunzi‘] 61 # 62 # iter_l=l.__iter__() 63 # print(iter_l) 64 # print(iter_l.__next__()) 65 # print(iter_l.__next__()) 66 # print(iter_l.__next__()) 67 # print(iter_l.__next__()) 68 # print(next(iter_l)) #next()---->iter_l.__next__() 69  70  71  72  73  74  75  76  77  78  79 # def test(): 80 #     yield 1 81 #     yield 2 82 #     yield 3 83 # g=test() 84 # print(‘来自函数‘,g) 85 # print(g.__next__()) 86 # print(g.__next__()) 87  88 #三元表达式 89 # name=‘alex‘ 90 # name=‘linhaifeng‘ 91 # res=‘SB‘ if name == ‘alex‘ else ‘帅哥‘ 92 # print(res) 93  94  95 #列表解析 96 # egg_list=[] 97 # for i in range(10): 98 #     egg_list.append(‘鸡蛋%s‘ %i) 99 # print(egg_list)100 101 # l=[‘鸡蛋%s‘ %i for i in range(10)]102 # l1=[‘鸡蛋%s‘ %i for i in range(10) if i > 5 ]103 # ll = [‘鸡蛋的%s‘ %i for i in range(10)]104 # lll = [‘鸡蛋%s‘%i for i in range(10) if i<5]105 # # l1=[‘鸡蛋%s‘ %i for i in range(10) if i > 5 else i] #没有四元表达式106 # l2=[‘鸡蛋%s‘ %i for i in range(10) if i < 5] #没有四元表达式107 #108 # # print(l)109 # print(l1)110 # print(l2)111 112 # laomuji=(‘鸡蛋%s‘ %i for i in range(10)) #生成器表达式113 # laomuji = (‘狗蛋%s‘ %i for i in range(10))114 # print(laomuji)115 #116 # print(laomuji.__next__())117 # print(laomuji.__next__())118 # print(next(laomuji))119 # print(next(laomuji))120 # print(next(laomuji))121 # print(next(laomuji))122 # print(next(laomuji))123 # print(next(laomuji))124 # print(next(laomuji))125 # print(next(laomuji))126 127 # l=[1,2,3,34]128 # map(func,l)129 130 # print(sum(l))131 # print(sum())132 # print(sum(i for i in range(10000)))133 print(sum(i for i in range(101)))

python之迭代器和生成器