Backend Development
Python Tutorial
python3 list addition, deletion, modification, search, merge and sort method
python3 list addition, deletion, modification, search, merge and sort method
# Auther: Aaron Fan
names = ["aaron", "alex", "james", "meihengfan"]
names2 = [1,2,3,4,5]
print(names)
#Check
#print(names) #List the contents of the list
print(names[3]) #Access the 4th value in the list
print (names[1:3]) #Access the second to third values in the list
print(names[-1]) #Access the last value in the list
print(names[:- 2]) #Access all values in the list, but remove all values from the second to last and after.
print(names[-3:]) #Access the first to third from the last in the list Value
print(names[0],names[3]) #Note that when taking multiple values, you cannot write the subscripts together directly. You need to write them in this way
print(names[::2 ]) #Print the list, but use 2 as the step size, that is, jump and cut, you can also change the step size according to your needs
print(names.index("james")) #Search for the element james in the list Subscript
print(len(names)) #Determine the length of the list
#Increase
names.append("jack") #Insert an element at the end of the list
names.insert(1, "Fanheng")#insert fanheng to the second position
# "
Names [2] =" liming "#to change the element of the third position to liming
# to delete
Names .remove ("liming")#Delete the element liming from the list
Del names [2]#Delete the third element. .pop() #Deletes the element at the end of the list by default. Of course, you can also directly specify the subscript of the element to pop up a specified element, and let you wait for it to be used.
#Whenever you use pop, the element that is popped The element is no longer in the list.
#pop pops an element out of the list. The popped value can be directly assigned to other variables for use, such as:
popend_name = names.pop()
print(popend_name)
#names.
clear
() #Clear the list, dangerous operation, please use it with caution #Other operations#names.reverse() #Reverse the list, that is, complete the original order In reverse
#Sort
#names.
sort
() #Permanently sort the list print(sorted(names)) ##Merge listnames.extend(names2) # #
The above is the detailed content of python3 list addition, deletion, modification, search, merge and sort method. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1662
14
1419
52
1311
25
1261
29
1234
24
Python vs. C : Applications and Use Cases Compared
Apr 12, 2025 am 12:01 AM
Python is suitable for data science, web development and automation tasks, while C is suitable for system programming, game development and embedded systems. Python is known for its simplicity and powerful ecosystem, while C is known for its high performance and underlying control capabilities.
The 2-Hour Python Plan: A Realistic Approach
Apr 11, 2025 am 12:04 AM
You can learn basic programming concepts and skills of Python within 2 hours. 1. Learn variables and data types, 2. Master control flow (conditional statements and loops), 3. Understand the definition and use of functions, 4. Quickly get started with Python programming through simple examples and code snippets.
Python: Games, GUIs, and More
Apr 13, 2025 am 12:14 AM
Python excels in gaming and GUI development. 1) Game development uses Pygame, providing drawing, audio and other functions, which are suitable for creating 2D games. 2) GUI development can choose Tkinter or PyQt. Tkinter is simple and easy to use, PyQt has rich functions and is suitable for professional development.
How Much Python Can You Learn in 2 Hours?
Apr 09, 2025 pm 04:33 PM
You can learn the basics of Python within two hours. 1. Learn variables and data types, 2. Master control structures such as if statements and loops, 3. Understand the definition and use of functions. These will help you start writing simple Python programs.
Python vs. C : Learning Curves and Ease of Use
Apr 19, 2025 am 12:20 AM
Python is easier to learn and use, while C is more powerful but complex. 1. Python syntax is concise and suitable for beginners. Dynamic typing and automatic memory management make it easy to use, but may cause runtime errors. 2.C provides low-level control and advanced features, suitable for high-performance applications, but has a high learning threshold and requires manual memory and type safety management.
Python and Time: Making the Most of Your Study Time
Apr 14, 2025 am 12:02 AM
To maximize the efficiency of learning Python in a limited time, you can use Python's datetime, time, and schedule modules. 1. The datetime module is used to record and plan learning time. 2. The time module helps to set study and rest time. 3. The schedule module automatically arranges weekly learning tasks.
Python: Exploring Its Primary Applications
Apr 10, 2025 am 09:41 AM
Python is widely used in the fields of web development, data science, machine learning, automation and scripting. 1) In web development, Django and Flask frameworks simplify the development process. 2) In the fields of data science and machine learning, NumPy, Pandas, Scikit-learn and TensorFlow libraries provide strong support. 3) In terms of automation and scripting, Python is suitable for tasks such as automated testing and system management.
Python: Automation, Scripting, and Task Management
Apr 16, 2025 am 12:14 AM
Python excels in automation, scripting, and task management. 1) Automation: File backup is realized through standard libraries such as os and shutil. 2) Script writing: Use the psutil library to monitor system resources. 3) Task management: Use the schedule library to schedule tasks. Python's ease of use and rich library support makes it the preferred tool in these areas.
