Python2018-字符串中字符个数统计

1 编写程序，完成以下要求：

• 统计字符串中，各个字符的个数
• 比如："hello world" 字符串统计的结果为： h:1 e:1 l:3 o:2 d:1 r:1 w:1

•  1 print("-"*50)
   2 print("*"*50)
   3 currentstr = input("PLease input a sentence, the program will cal the word num:")
   4 
   5 currentstr=currentstr.replace(‘ ‘,‘‘)## Delete the ‘Space‘ value
   6 newstr=‘‘  #a new string to store the result
   7 for i in currentstr:
   8         if(currentstr.count(i)<=1):# if  there is only one word in currentstr
   9                 newstr=newstr+i
  10                 newstr=newstr+‘:‘
  11                 newstr=newstr+str(1)+‘ ‘
  12         else:#the word has 2 or more numbers
  13                 if(newstr.count(i)<1): # has not register in the new string
  14                         newstr= newstr+i
  15                         newstr=newstr+‘:‘
  16                         newstr= newstr+str(currentstr.count(i))+‘ ‘
  17 
  18 print("-"*50)
  19 print("The word number in this sentence is : %s"%newstr)
  20 print("-"*50)
  21

   

结果如下：