具体操作步骤如下：
#统计词频
#1 输入文章
#2 建立统计词频的空字典
#3 对文本的一行统计词频
#4 获取字典数据对
#5 对数据对进行排序
#6 输出结果
#7 用Turtle库绘制词频结果图表 实现效果如下：
实现代码如下：
import turtle ##全局变量## count = 10 data = [] words = [] yScale = 6 xScale = 30 ################### #################Turtle Start ############# #绘制线段(x1,y1)到(x2,y2) 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) #绘制图表 def drawGraph(t):#绘制x/y轴线 drawLine(t,0,0,360,0)drawLine(t,0,300,0,0)#x轴：坐标以及描述 for x in range(count):x = x+1 #右移一位，不在原点 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 * xScaley = y * yScaledrawLine(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统计词频的函数 def processLine(line,wordCounts): #wordCounts空字典 #用空格代替标点符号 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 = line.replace(ch," ")return linedef main():#用户输入文件名 filename = raw_input("enter a filename: ").strip()infile = open(filename,"r")#建立用于计算词频的字典 wordCounts = {}for line in infile:processLine(line.lower(),wordCounts)#从字典获取数据对 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]+" "+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()if __name__ == '__main__':main()