Python Learning-string practice

Python string Practice

1. Enter a line of characters, counting how many words there are, separated by a space between each of the two words. As input: This is a C + + program. Output: There is 5 words in the line. "Assessment Knowledge Point: String Manipulation"
   Code:

   s=input("请输入一行句子：")list = s.split(‘ ‘)print("There are %d words in the line." %len(list))

   Operation Result:
   

In addition, considering that sometimes the hand shakes a lot of space, and then think of a method:

count = 0s=input("输入字符：")for i in range(len(s)):    if i+1 > len(s)；        count+=1    else:        if s[i] == ‘ ‘ and s[i+1] != ‘ ‘:            count+=1

2. Give a string, in the program to assign the initial value to a sentence, such as "he threw three free throws", the self-coding function to complete the following functions:
   1) Find out the number of characters in the character list (for example, the output is 26);
   2) Calculate the frequency of the occurrences of each character in a sentence (stored through a dictionary); ---Learn the dictionary and realize it
   3) Storing the statistical information in the file "statistics. txt"; ---Finish the file operation and then implement
   Code:

   def function(s):print("字符串中字符的个数为： %d" %len(s))dict = {}for i in s:    if i in dict:        dict[i] += 1    else:        dict[i] = 1f = open("统计.txt","w")for i in dict:    f.write(i+"："+str(dict[i])+"\t")f.close()string = input("请输入字符串：")function(string)

   Execution Result:
   

You can see that the "statistics. txt" file is generated. Open to see if the content is written correctly,

3. (2017-Good future-written test programming questions)--practice

• Title Description:
  Enter two strings, removing all the characters from the second string from the first string. For example, enter "they is students." and "Aeiou", the first string after deletion becomes "Thy R stdnts."

• Input Description:
  Each test input consists of 2 strings

• Output Description:
  Output the deleted string

• Example 1:

输入    They are students.    aeiou输出    Thy r stdnts.

Code:

str1 = input("请输入第一个字符串：")str2 = input("请输入第二个字符串：")str3 = ‘‘for i in str2:    if i not in str3:        str3+=ifor i in str3:    str1=str1.replace(i,‘‘)print(str1)

Operation Result:

4. (2017-NetEase-written test programming questions)-string practice

Small, easy-to-like words have the following characteristics:
1. Words each letter is uppercase
2. Words have no consecutive equal letters
The column may not be contiguous.
For example:
Xiao Yi does not like "ABBA", because there are two consecutive ' B '
Small easy to Like "A", "ABA" and "ABCBA" these words
Give you a word, you have to answer whether Xiao Yi will like the word.

• Input Description:
  Input is a string consisting of uppercase letters with a length of less than 100

• Output Description:
  If small easy to like output "likes", do not like output "dislikes"

Example 1:

输入    AAA输出    Dislikes

Code:

s = input("请输入字符串：")for i in range(len(s)):    if s[i] < ‘A‘ or s[i] >‘Z‘:        print("Dislike")        break    else:        if i < len(s)-1 and  s[i] == s[i+1]:            print("Dislike")            breakelse:    print("Likes")

Execution Result:

Python Learning-string practice