current location：Home > Technical Articles > Backend Development
- Direction：
- All web3.0 Backend Development Web Front-end Database Operation and Maintenance Development Tools PHP Framework Daily Programming WeChat Applet Common Problem Other Tech CMS Tutorial Java System Tutorial Computer Tutorials Hardware Tutorial Mobile Tutorial Software Tutorial Mobile Game Tutorial
- Classify：
-
- What is the main difference between c language and python?
- C language and Python are two completely different programming languages. They have significant differences in syntax, design concepts, performance and application fields. C language is a procedural language known for its simplicity and efficiency. It is mainly used for low-level system programming and scenarios with high performance requirements. Python is an interpreted language with clear and concise syntax, easy to use, and is widely used in fields such as data analysis, artificial intelligence, and web development.
- C#.Net Tutorial . django 603 2024-03-14 16:44:50
-
- What is the use of python programming?
- Python is a versatile programming language that is widely used in various fields. Its uses include web development, data science and machine learning, automation scripting, scientific computing, game development, web scraping, desktop application development, and education and learning. Python's ease of use and rich library and tools make it an ideal choice for a variety of projects and tasks.
- Python Tutorial . django 674 2024-03-14 15:54:49
-
- The secret of asynchronous programming in Python: Achievements with coroutines
- Basics of Coroutines A coroutine function, also known as a generator function, is a special function that pauses its execution and returns a value. When it is time to continue execution, the coroutine function can use the yield statement to send a value to the caller and pause itself. The caller can later resume the execution of the coroutine function by calling the next() method to obtain the next value returned by the coroutine function. In python, a coroutine is declared by the asyncdef keyword and its execution is suspended using the await keyword. The await statement returns control to the event loop, allowing other coroutines or tasks to execute. When the suspended task is completed, the event loop will automatically resume the execution of the suspended coroutine function. Event Loop Event Loop is Pytho
- Python Tutorial . django 546 2024-03-12 08:10:27
-
- A detailed explanation of tag languages other than PHP and their uses
- HTML and CSS HTML and CSS are common tag languages in web development. HTML is used to define the structure of web pages, while CSS is used to control the style of web pages. Specifically, HTML uses various tags to represent different elements of a web page, such as titles, paragraphs, links, pictures, etc. CSS uses style rules to design the appearance of these elements, including color, font, size, layout, etc. Here's a simple HTML and CSS example: <
- PHP Tutorial . django 1167 2024-03-11 13:40:01
-
- Solve the problem of ValueError(\'woops\') in django
- The reason for the error is that this ValueError is explicitly thrown by your code. This means that there is a raise statement in your code that contains the string "woops". This error is usually caused by the code encountering an unhandable situation while running, or because the code detects some incorrect input or state. In order to solve this problem, you need to check your code to find out what caused the ValueError exception and fix the problem. This might require you to check that the input data is incorrect, that the code handles edge cases correctly, or that the code catches all possible exceptions. How to solve In order to solve this problem, you need to find out the exception that causes ValueError
- Python Tutorial . django 564 2024-03-01 11:40:02
-
- Solve NotImplementedError(\'Area on geodetic coordinate systems not supported.\') error in django
- Reason for the error If "NotImplementedError" occurs when using Django, it may be because you are trying to use a feature that is not implemented. Specifically, if you see the error message "Areaongeodeticcoordinatesystemsnotsupported.", you are having trouble trying to calculate area on a geographic coordinate system (such as WGS84). Since the geographic coordinate system is not a projected coordinate system, the area cannot be calculated directly. You need to use a projected coordinate system (e.g. UTM) or use a special algorithm to calculate the area on a geographic coordinate system. If you wish to solve this problem you could try using a projected coordinate system or use something like
- Python Tutorial . django 1031 2024-02-29 23:00:22
-
- 解决方案：django exceptions.FieldError(\'The relation has multiple target fields, but only single target field \'\'was asked for\')
- The reason for the error FieldError ("Therelationhasmultipletargetfields,butonlysingletargetfieldwasaskedfor") is usually caused by when you try to access a field of an associated object, and the associated object actually has multiple target fields. For example, suppose you have a model `Author` and a model `Book`, and there is a many-to-many relationship between them. This error will occur if you try to access the `book` field of an `Author` object, but the associated object is actually associated with multiple `Book` objects. To solve this problem,
- Python Tutorial . django 1270 2024-02-29 22:34:02
-
- Solution for ValueError(\'Cannot quote parameter value %r of type %s\' % (value, type(value)))
- Reason for the error This error usually indicates that you are trying to use Django's ORM (Object Relational Mapping) and passing a value that cannot be converted to a string in the sql statement. For example, suppose you are executing the following query: MyModel.objects.filter(field=some_value) If `some_value` is a type that cannot be converted to a string (such as a list or dictionary), then a `ValueError` exception will be raised because it cannot be Use values of this type as strings in SQL statements. The solution is to check your code and make sure the parameters you pass to DjanGoORM are of a type that can be converted to a string. if you are not sure
- Python Tutorial . django 427 2024-02-29 20:52:22
-
- Solution: django NotSupportedError(\'Perimeter cannot use a non-projected field.\')
- The reason for the error "NotSupportedError("Perimetercannotuseanon-projectedfield.")" This error usually occurs when you try to use an unprojected field to calculate the perimeter in Django. There are two types of fields in DjanGo: projected fields and unprojected fields. Projected fields are fields that represent geographic information in a plane coordinate system, while unprojected fields are fields that represent geographic information in an ellipsoid coordinate system. If you see the "NotSupportedError("Perimetercannotuseanon-projectedfield.")" error, then
- Python Tutorial . django 959 2024-02-29 20:40:02
-
- Django has Resolver404({\'tried\': tried, \'path\': new_path}) error. What's going on?
- The reason for the error is usually caused by the URL pattern defined in Django failing to match the requested URL. For example, if a URL pattern is defined in DjanGo's URLconf, but the URL you are trying to access does not match the pattern, a Resolver404 error will occur. A workaround could be to ensure that the URL patterns are correctly defined in the URLconf and that the requested URL matches these patterns. You can also use Django's logging feature to see a list of URL patterns that were tried to match to help debug where the problem is. How to resolve To resolve the Resolver404 error, you need to perform the following steps: Make sure you are correctly determined in Django's URLconf
- Python Tutorial . django 661 2024-02-29 20:10:09
-
- What to do if django reports AssertionError(\'this function should never be called\')
- Reason for the error This error usually indicates that your Django code calls a function that should not be called. This is usually due to a coding error or logic error within the function. For example, suppose you have the following code: deffoo():assertFalse,"thisfunctionshouldneverbecalled"foo(). Running this code will raise the following `AssertionError` exception: AssertionError:thisfunctionshouldneverbecalled. The solution is to check your code to make sure you are calling the correct function. , and ensure that the logic inside the function is correct.
- Python Tutorial . django 1294 2024-02-29 17:25:27
-
- How to implement python online playback function
- Implementation method: 1. Install the necessary libraries; 2. Create a simple web application; 3. Upload audio files; 4. Process audio files; 5. Provide online playback function; 6. Respond to playback requests.
- Python Tutorial . django 1064 2024-02-29 10:28:01
-
- Python Django Expert Interviews: Get Insights from Industry Experts
- Introduction: pythonDjango is a popular WEB framework known for its flexibility and scalability. It has been widely used to develop various web applications, ranging from news websites to e-commerce platforms. In order to better understand the latest developments and best practices of the DjanGo framework, we interviewed Python Django experts. Here is the interview. Q: What is the most notable new feature of Django? Answer: Django 4.0 introduces many impressive new features, such as asynchronousviews, which allows you to easily write asynchronous views using the asyncio library, thereby improving the performance and scalability of your application. In addition, Django 4.0 also improves the model
- Python Tutorial . django 414 2024-02-27 23:00:04
-
- Python Django vs. other frameworks: Choose the one that's right for you
- Advantages of Django 1. Ease of use DjanGo is known for its ease of use. It has a simple API and clear documentation, making it easy for even beginners to get started. You can create a new Django project in just minutes and a fully functional website in a few hours. 2. Flexibility and scalability Django is a very flexible and scalable framework. It can be used to build various types of websites, from simple blogs to complex e-commerce websites. Django also supports a variety of databases, and you can choose the most appropriate database according to your needs. 3. Built-in security features Django has built-in security features to protect your website from attacks. These features include CSRF
- Python Tutorial . django 931 2024-02-27 21:10:02
-
- How to connect to MySQL using Python
- 1. MySQL-pythonMySQL-python, also called MySQLdb, is the most popular driver for Python to connect to MySQL. Many frameworks are also developed based on this library. Unfortunately, it only supports Python2.x, and there are many prerequisites during installation. , because it is a library developed based on C. It is very unfriendly to install on the Windows platform and often fails. It is basically not recommended to use it now and will be replaced by its derivative version. #Precondition sudoapt-getinstallpython-devlibmysqlclient-dev#Ubuntusudoyuminstallpython-de
- LINUX . django 946 2024-02-27 09:04:22
Tool Recommendations
jQuery enterprise message form contact code
jQuery enterprise message form contact code is a simple and practical enterprise message form and contact us introduction page code.
form button
2024-02-29
HTML5 MP3 music box playback effects
HTML5 MP3 music box playback special effect is an mp3 music player based on HTML5 css3 to create cute music box emoticons and click the switch button.
Player special effects
2024-02-29
HTML5 cool particle animation navigation menu special effects
HTML5 cool particle animation navigation menu special effect is a special effect that changes color when the navigation menu is hovered by the mouse.
Menu navigation
2024-02-29
jQuery visual form drag and drop editing code
jQuery visual form drag and drop editing code is a visual form based on jQuery and bootstrap framework.
form button
2024-02-29
Organic fruit and vegetable supplier web template Bootstrap5
An organic fruit and vegetable supplier web template-Bootstrap5
Bootstrap template
2023-02-03
Bootstrap3 multifunctional data information background management responsive web page template-Novus
Bootstrap3 multifunctional data information background management responsive web page template-Novus
backend template
2023-02-02
Real estate resource service platform web page template Bootstrap5
Real estate resource service platform web page template Bootstrap5
Bootstrap template
2023-02-02
Simple resume information web template Bootstrap4
Simple resume information web template Bootstrap4
Bootstrap template
2023-02-02
Cute summer elements vector material (EPS PNG)
This is a cute summer element vector material, including the sun, sun hat, coconut tree, bikini, airplane, watermelon, ice cream, ice cream, cold drink, swimming ring, flip-flops, pineapple, conch, shell, starfish, crab, Lemons, sunscreen, sunglasses, etc., the materials are provided in EPS and PNG formats, including JPG previews.
PNG material
2024-05-09
Four red 2023 graduation badges vector material (AI EPS PNG)
This is a red 2023 graduation badge vector material, four in total, available in AI, EPS and PNG formats, including JPG preview.
PNG material
2024-02-29
Singing bird and cart filled with flowers design spring banner vector material (AI EPS)
This is a spring banner vector material designed with singing birds and a cart full of flowers. It is available in AI and EPS formats, including JPG preview.
banner picture
2024-02-29
Golden graduation cap vector material (EPS PNG)
This is a golden graduation cap vector material, available in EPS and PNG formats, including JPG preview.
PNG material
2024-02-27
Home Decor Cleaning and Repair Service Company Website Template
Home Decoration Cleaning and Maintenance Service Company Website Template is a website template download suitable for promotional websites that provide home decoration, cleaning, maintenance and other service organizations. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-05-09
Fresh color personal resume guide page template
Fresh color matching personal job application resume guide page template is a personal job search resume work display guide page web template download suitable for fresh color matching style. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-29
Designer Creative Job Resume Web Template
Designer Creative Job Resume Web Template is a downloadable web template for personal job resume display suitable for various designer positions. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28
Modern engineering construction company website template
The modern engineering and construction company website template is a downloadable website template suitable for promotion of the engineering and construction service industry. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28
