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💦 Today, let's learn about the more basic DataStream API in flink, which is used to process stream data. This article is mainly in the form of pyflink to explain to the small partners who are interested in the content of previous periods 👇: hadoop topics: hadoop series articles.spark topics: spark series.Flynk topics: Flink series. 💛 The A ...

"Stupid method" learning Python 3 basic articles series "Stupid method" learning Python 3 basic part 1 - printing and input "Stupid method" learning Python 3 basic part 2 - file operation "Stupid method" learning Python 3 basic part 3 - function "Stupid method" learning Python 3 Foundation Part ...

Life is short, learn Python! In the previous article, we tried to use Python to realize text OCR recognition many times! Today we are going to make an upgraded version: directly write an image character recognition OCR tool! introduction Recently, I talked about a demand for image and character recognition in the technical exchange group, w ...

Basic concepts Namespace The mapping from name to object is mostly implemented by dictionary in python Built inglobalLocal, local Namespaces have a life cycle, which simply means that the function ends when it returns Scope python programs can directly access the body area of the namespace Built inglobalenclosing, which is outside th ...

*** Process control 1) Sequential structure: code is executed from top to bottom, and each statement is executed in sequence (default) 2) Branch structure: choose to execute or not execute part of the code according to the conditions (use if) 3) Loop structure: make the code execute repeatedly (for, while) Branching structure age = 10 if ag ...

Conversion between VOC dataset (xml format) and COCO dataset (json format) Let's first look at the directory structure of voc and coco datasets: Take the VOC2012 dataset as an example, there are five folders below: The Annotations folder is the XML file corresponding to the image. For example, "2007_000027.xml" stores the informatio ...

Uiautomator2 common API s Pure manual output, it is recommended to collect praise, one key and three connections github reference link: https://github.com/openatx/uiautomator2/tree/master/uiautomator2 Install ATX agent python -m uiautomator2 init Using webitor under win python -m weditor Enter the page by address http://192.168 ...

The author of httprunner is debugtalk. He is a senior developer. At present, there are five versions of httprunner The usage of Httprunner is relatively simple and conforms to a variety of scenarios in work: 1. After completing the interface automation, it is required to continue the performance test of this interface (hrun has a built-in locus ...

1, Database overview 1. Why use a database If the data is stored in a file, reading and writing occupy disk IO, and the efficiency is lowData security considerationsSupport high concurrency 2. Database classification At present, databases can be divided into two categories: relational databases and non relational databases 2.1 relation ...

Content introduction: Basic concepts of functions and modulesCode reuse using functionsCommon built-in modules and functions in PythonCustom functions and calls between functionsParameters and return values in functions function A function is a group of statements that are grouped together to complete an operation Benefits of using functio ...