What is a string? String instance operations and processing in python

This article mainly introduces you to the relevant knowledge about strings in python. Friends who have just come into contact with the python language must not know much about strings in python. python stringstr is the most common basic data type in the process of writing programs in Python. When using the Python language, it is impossible to bypass string encoding. Next, I will take you to learn about the correct python string knowledge and how to perform string operations, such as Interception of Python strings and update

pythonString:

String is the most commonly used data type in Python. We can use quotes (' or ") to create strings.

Creating a string is simple, just assign a value to a variable. For example:

var1 = 'Hello World!'
var2 = "blue sky"

The above example is simple, Let me explain how Python accesses the value in a string:

Python does not support single character types, and single characters are also used as a string in Python.

To access substrings in Python, you can use square brackets to perform Python string interception.

The example is as follows:

#!/usr/bin/python
 
var1 = 'Hello World!'
var2 = "Python Runoob"
 
print "var1[0]: ", var1[0]
print "var2[1:5]: ", var2[1:5]

The value output by the above example is:

var1[0]:  H
var2[1:5]:  ytho

I believe this should be easier to understand. The first one is to intercept the first string "H" in "Hello World!", and the second one is to intercept the first to fourth strings in the same way. It's "ytho". Intercepting a string is a very simple thing, I believe everyone should have understood it.

Next let's learn about python string update:

As the name implies, string update means that you can modify an existing string and assign it to another variable, as shown in the following example:

#!/usr/bin/python
# -*- coding: UTF-8 -*-
 
var1 = 'Hello World!'
 
print "更新字符串 :- ", var1[:6] + 'Runoob!'

This is quite simple, and the output result is as follows:

更新字符串 :-  Hello Runoob!

This article talks about strings in python, interception of strings, and updating of strings, and adds examples to assist you in understanding and learning. Because there are many knowledge points about strings So there will be articles in the future to explain and analyze string knowledge points to help you learn. I hope this article can bring some help to you who are learning python.

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