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1.print(len(nums))
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2.nums = [10, 20, 30, 40, 50, 60, 70, 80, 90]print(len(nums[-2:1:-2]), nums[-2:1:-2][-2]) ( )
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3.a = [9,6,4,5]N = len(a)for i in range(int(len(a)/2)):a[i],a[N-i-1] = a[N-i-1],a[i]print(a)
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4.st=[["a","b"],"c"]st[0][1]='d'print(len(st),st)结果是
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5.( )Number = 1,5,2,4,5,6,0]Print(sum(number)/len(number))
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6.x=’R\OS\OT’ print(len(x))A、3B、5C、7D、6
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7.len("abc")
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8.len(“vb程序设计”)=
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9.var str='It's good';var len=str.length;len的值为:
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10.下面代码的输出结果是l1=[1,2,3,2]
l2=['aa','bb','cc','dd','ee']
d={}
for index in range(len(l1)):
d[l1[index