Note:Theif-elseused in the above example is a conditional statement and not a loop. But just like thewhile loop(which we will cover soon), it uses the comparison operators for its condition. Example – Find Word Count In A Text Using The for Loop This example is all about counting how...
1. Windows 环境 打开 Cmd (开始-运行-CMD)。2. MacOS 环境 打开 Terminal (command+空格输入Terminal...
Note that the range() function's count starts from 0 and not from 1. That means that, in the above example, the count should be like 0,1,2 and not 1,2,3. That's how number counting in a computer's memory works. So, while designing a for loop, always keep in mind that you ...
把堆首(最大值)和堆尾互换; 把堆的尺寸缩小 1,并调用 shift_down(0),目的是把新的数组顶端数据调整到相应位置; 重复步骤 2,直到堆的尺寸为 1。 2. 动图演示 3. Python 代码实现 代码语言:javascript 代码运行次数:0 运行 AI代码解释 defbuildMaxHeap(arr):importmathforiinrange(math.floor(len(arr)/...
把堆的尺寸缩小 1,并调用 shift_down(0),目的是把新的数组顶端数据调整到相应位置; 重复步骤 2,直到堆的尺寸为 1。 Python 代码 defbuildMaxHeap(arr):import mathfor i in range(math.floor(len(arr)/2),-1,-1):heapify(arr,i) def heapify(arr, i):...
把堆的尺寸缩小 1,并调用 shift_down(0),目的是把新的数组顶端数据调整到相应位置; 重复步骤 2,直到堆的尺寸为 1。 2.动图演示 3.Python 代码 def buildMaxHeap(arr): import math for i in range(math.floor(len(arr)/2),-1,-1): heapify(arr,i) def heapify(arr, i): left = 2*i+1 righ...
for c in word: d[c] = d.get(c,0) + 1 print(d) The use of thegetmethod to simplify this counting loop ends up being a very commonly used “idiom” in Python and we will use it many times in the rest of the book. So you should take a moment and compare the loop using the...
def countingSort(arr, maxValue):bucketLen= maxValue+1bucket= [0]*bucketLensortedIndex =0arrLen = len(arr) for i in range(arrLen): if notbucket[arr[i]]:bucket[arr[i]]=0bucket[arr[i]]+=1forjin range(bucketLen):whilebucket[j]>0:arr[sortedIndex] =jsortedIndex+=1bucket[j]-=1retu...
(2)Python 代码defcountingSort(arr, maxValue): bucketLen = maxValue+1 bucket = [0]*bucketLen sortedIndex =0 arrLen = len(arr) foriinrange(arrLen): ifnotbucket[arr[i]]: bucket[arr[i]]=0 bucket[arr[i]]+=1 forjinrange(bucketLen): ...
把堆的尺寸缩小 1,并调用 shift_down(0),目的是把新的数组顶端数据调整到相应位置; 重复步骤 2,直到堆的尺寸为 1。 2. 动图演示 3. Python 代码 def buildMaxHeap(arr): import math for i in range(math.floor(len(arr)/2),-1,-1):