A、ls.clear()只是清空列表,del ls是删除列表对象
B、ls.clear()只是删除列表对象,del ls是清空列表
C、ls.clear()与del ls的处理结果没有区别
D、ls.clear()只是清空列表,del ls是删除程序
答案：A
A、ls.clear()只是清空列表,del ls是删除列表对象
B、ls.clear()只是删除列表对象,del ls是清空列表
C、ls.clear()与del ls的处理结果没有区别
D、ls.clear()只是清空列表,del ls是删除程序
答案：A
A. for i in range(3)print(i)
B. for i in range (2):print(i+1)
C. aⱣⱤlist=[0,1,2]for i in aⱣⱤlist:print(i+1)
D. i=1while i<3:print (i)i=i+1
A. 删除字符串头尾指定的字符
B. 删除字符串末尾指定的字符
C. 删除字符串头部指定的字符
D. 通过指定分隔符对字符串切片
A. d = {}print(d)
B. d = dict()print(d)
C. d = ()print(d)
D. d = set()print(d)
A. n=int(input())result=0foriinrange(n):ifi%2==1:result=result+iprint(result)
B. n = int(input())result = 0for i in range(1, n):if i % 2 == 1:result = result + iprint(result)
C. n = int(input())result = 0for i in range(n):result = result + iprint(result)
D. n = int(input())print(sum([i for i in range(n) if i % 2 == 1]))
下面程序段中,能正确表示上面关系的是()
A. y = x + 1if x >= 0:if x == 0:y = xelse:y = x-1
B. y = x - 1if x! = 0:if x > 0:y = x + 1else:y = x
C. if x <= 0:if x < 0:y = x - 1else:y = xelse:y = x+1
D. y = xif x <= 0:if x < 0:y = x - 1else:y = x + 1
A. len
B. max
C. min
D. tuple
A. x, y = 5, 10
B. x, y = (5, 10)
C. a, b, c = 'xyz'
D. x, y = [3, 6]
A. 对
B. 错
A. x=y=z=1
B. x=(y=z+1)
C. x,y=y,x
D. x+=y
