本文实例为大家分享了python字典操作实例的具体代码，供大家参考，具体内容如下

#!/usr/bin/env python3# -*- coding: utf-8 -*-import turtle ##全局变量###词频排列显示个数count = 10#单词频率数组-作为y轴数据data = []#单词数组-作为x轴数据words = []#y轴显示放大倍数-可以根据词频数量进行调节yScale = 6#x轴显示放大倍数-可以根据count数量进行调节xScale = 30 ################# Turtle Start #################### #从点(x1,y1)到(x2,y2)绘制线段def drawLine(t, x1, y1, x2, y2): t.penup() t.goto (x1, y1) t.pendown() t.goto (x2, y2) # 在坐标(x,y)处写文字def drawText(t, x, y, text): t.penup() t.goto (x, y) t.pendown() t.write(text) def drawGraph(t): #绘制x/y轴线 drawLine (t, 0, 0, 360, 0) drawLine (t, 0, 300, 0, 0) #x轴: 坐标及描述 for x in range(count): x=x+1 #向右移一位,为了不画在原点上 drawText(t, x*xScale-4, -20, (words[x-1])) drawText(t, x*xScale-4, data[x-1]*yScale+10, data[x-1]) drawBar(t) #绘制一个柱体def drawRectangle(t, x, y): x = x*xScale y = y*yScale#放大倍数显示 drawLine(t, x-5, 0, x-5, y) drawLine(t, x-5, y, x+5, y) drawLine(t, x+5, y, x+5, 0) drawLine(t, x+5, 0, x-5, 0) #绘制多个柱体def drawBar(t): for i in range(count): drawRectangle(t, i+1, data[i]) ################# Turtle End #################### #对文本的每一行计算词频的函数def processLine(line, wordCounts): #用空格替换标点符号 line = replacePunctuations(line) #从每一行获取每个词 words = line.split() for word in words: if word in wordCounts: wordCounts[word] += 1 else: wordCounts[word] = 1 #空格替换标点的函数def replacePunctuations(line): for ch in line: if ch in "~@#$%^&*()_-+=<>?/,.:;{}[]|\'""": line = line.replace(ch, " ") return line def main(): #用户输入一个文件名 filename = input("enter a filename:").strip() infile = open(filename, "r") #建立用于计算词频的空字典 wordCounts = {} for line in infile: processLine(line.lower(), wordCounts) #从字典中获取数据对 pairs = list(wordCounts.items()) #列表中的数据对交换位置,数据对排序 items = [[x,y]for (y,x)in pairs] items.sort() #输出count个数词频结果 for i in range(len(items)-1, len(items)-count-1, -1): print(items[i][1]+"\t"+str(items[i][0])) data.append(items[i][0]) words.append(items[i][1]) infile.close() #根据词频结果绘制柱状图 turtle.title('词频结果柱状图') turtle.setup(900, 750, 0, 0) t = turtle.Turtle() t.hideturtle() t.width(3) drawGraph(t) turtle.done() #调用main()函数if __name__ == '__main__': main()

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