Shulou(Shulou.com)06/01 Report--

In this article Xiaobian for you to introduce in detail the "Python string processing methods", the content is detailed, the steps are clear, the details are handled properly, I hope this "Python string processing methods" article can help you solve your doubts, following the editor's ideas slowly in-depth, together to learn new knowledge.

1. Slicing and multiplication of strings

(1) slice

(2) multiplication

When we write Python code with delimiters, it's easy to multiply strings.

two。 Segmentation of string

(1) ordinary segmentation, using the split function, but split can only do very simple segmentation, and does not support multiple separations.

(2) complex segmentation, r means no escape, the delimiter can be ";", or ",", or the space is followed by more than 0 extra spaces, and then split according to this pattern.

3. Concatenation and merging of strings

(1) to connect, two characters can be easily connected by "+"

(2) merge and use join method

4. Determine whether the string ends with a specified prefix and suffix

Suppose we want to find out what the name of a file begins or ends with?

5. Search and match of strings

(1) General search

Using the find method, you can easily look up a substring in a long string. It will return the index of the location of the string. If you cannot find it, return-1.

(2) for complex matching, regular expressions are needed.

6. Count the number of times a character appears in a string

7. Replacement of string

(1) ordinary replacement can be done with replace method.

(2) complex replacement requires the sub function of the re module

8. Remove some specific characters from the string

(1) to remove spaces, when dealing with text, such as reading a line from a file, and then need to remove each line of space, table, or newline characters.

(2) for complex text cleaning, you can use str.translate.

For example, first build a conversion table. Table is a translation table that converts "to" into uppercase "TO", then removes' 12345 strings from old_str, and then translates the rest of the string through table.

Read here, this "Python string processing methods" article has been introduced, want to master the knowledge of this article also need to practice and use to understand, if you want to know more about the article, welcome to follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.