Data processing The main ones organized here are .txt, .json, .csv, .excel, .pkl Data storage and conversion between files 1. txt part 1.1 List[dict] conversion to txt specific code def save_jsonlist_txt(json_data, target_path): “”” Save json list to txt file “”” with open(target_path, “w”, encoding=”utf-8″) as file: for item in json_data: item = str(item).replace(“\ “, “\\ […]
Tag: roc
Explosive performance! Python multi-process mode implements multi-core CPU parallel computing
Article directory Preface 1. Multi-process mode in Python 2. Methods to improve program execution efficiency 1. Multiple processes execute tasks concurrently 2. Process pool 3.Message queue 4. Shared memory 5.Asynchronous IO Summarize About Python technical reserves 1. Learning routes in all directions of Python 2. Python basic learning video 3. Excellent Python learning books 4. […]
Python Artificial Intelligence in Practice: Intelligent Signal Processing
1. Background Introduction At present, artificial intelligence technology has entered the field of automation and achieved remarkable results. It has made breakthrough progress in the fields of image recognition, speech recognition, natural language processing and other fields, but it has not received such attention in the field of signal processing. For digital signal processing, many […]
Matinal: Analysis of the whole process of SAP ABAP publishing HTTP RestFul service (5)
1. Background introduction RESTful is a design style and development method for web applications. REST is the abbreviation of Representational State Transfer, and the Chinese translation is “representational state transfer”. It may not be easy to understand REST from the definition alone. For students who have just come into contact with this concept, REST can […]
Use C# to simplify your work (processing Excel tables)
Use C# to simplify work (processing Excel tables) It is necessary to deduplicate the data in several Excel tables, and then save the data of each site as a Sheet. Several tables are shown below: The implementation effect is as follows: Detailed implementation Need to use EPPlus to operate Excel Install EPPlus as follows: For […]
Golang integrates RocketMQ
RocketMQ related knowledge summary What is RocketMQ RocketMQ is an open source MQ framework from Alibaba. It is widely used in different business scenarios and has very good ecosystem support. It supports transaction messages, sequential messages, batch messages, scheduled messages, message traceback and other functions. RocketMQ core concepts Name Service (NameServer): It can be understood […]
springMVC execution process and working principle
SpringMVC execution process: 1. The user sends a request to the front-end controller DispatcherServlet 2. DispatcherServlet receives the request and calls the processor mapper HandlerMapping. 3. The processor mapper finds the specific processor according to the request URL, generates the processor execution chain HandlerExecutionChain (including the processor object and processor interceptor) and returns it to […]
Redis uses Pipeline (pipeline) batch processing
Redis batch processing During development, it is sometimes necessary to process large batches of Redis. For example, Redis queries multiple Hash in batches. If you query one by one in a for loop, the performance will be very poor. In this case, you can use Pipeline. Pipeline Pipeline can send multiple commands at once and […]
[Linux Process Control (3)] Process Program Replacement–How to implement a bash interpreter yourself?
Blogger CSDN homepage:Hangdian Code Farmer-NEO ? ?Column classification:Linux from entry to proficiency? ? Code Warehouse: NEO’s Learning Diary ? Follow meTeach you more operating system knowledge ? Process program replacement 1 Introduction 2. Understanding of exec series functions 3. execl series functions 4. execv series functions 5. Usage scenarios of program replacement 6. Implement a […]
The entire process of publishing an iOS app developed with uni-app to the App Store
1.0.3 20200927 Update the official status of the app review process. Note: The latest review will be followed up by synchronizing another record in the community with AppStore review rejection reasons and solutions. : Apple development and listing FAQ | appuploader usage tutorial 1.0.2 20200925 Added measures to resolve rejection emails for the first time. […]