Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Below is a bubble up function that takes 3 parameters: the list, a start index, and an end index, and bubbles the items in that range. We have started a
function called bubble down that takes the same 3 parameters but bubbles in the opposite direction. Complete function bubble down.
1 def bubble_up(L: list, start: int, end: int) -> None:
2.
""Bubble up through L[start:end], swapping items that are out of order.
>>> L = [4, 3, 2, 1, 0]
>>> bubble_up(L, 0, 3)
6
>>> L
[3, 2, 1, 4, 0]
>>> L = [4, 3, 2, 1, 0]
7
8
9
>>> bubble_up(L, 2, 4)
10
>>> L
11
[4, 3, 1, 0, 2]
12
13
14
for i in range(start, end):
15
if L[i] > L[i + 1]:
16
L[i], L[i + 1] = L[i + 1], L[i]
17
18
def bubble down (L: list, start: int, end: int) -> None:
19
"""Bubble down throughL from indexes end through start, swapping items that
20
are out of place.
21
22
>»> L %3D [4, 3, 2, 1, о]
23
>>> bubble_down (L, 1, 3)
24
>>> L
25
[4, 1, 3, 2, 0]
26
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Transcribed Image Text:Below is a bubble up function that takes 3 parameters: the list, a start index, and an end index, and bubbles the items in that range. We have started a function called bubble down that takes the same 3 parameters but bubbles in the opposite direction. Complete function bubble down. 1 def bubble_up(L: list, start: int, end: int) -> None: 2. ""Bubble up through L[start:end], swapping items that are out of order. >>> L = [4, 3, 2, 1, 0] >>> bubble_up(L, 0, 3) 6 >>> L [3, 2, 1, 4, 0] >>> L = [4, 3, 2, 1, 0] 7 8 9 >>> bubble_up(L, 2, 4) 10 >>> L 11 [4, 3, 1, 0, 2] 12 13 14 for i in range(start, end): 15 if L[i] > L[i + 1]: 16 L[i], L[i + 1] = L[i + 1], L[i] 17 18 def bubble down (L: list, start: int, end: int) -> None: 19 """Bubble down throughL from indexes end through start, swapping items that 20 are out of place. 21 22 >»> L %3D [4, 3, 2, 1, о] 23 >>> bubble_down (L, 1, 3) 24 >>> L 25 [4, 1, 3, 2, 0] 26
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