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Document description: This article is based on [ Official Documents In light of its own practice, there has been a slight reduction in the common installation steps (mainly due to the official consideration of various installation environments, this article is mainly limited to Ubuntu 16.04). system r ...

Python commonly used modules are calendar time datetime timeit os shutil zip math string Theoretically, all the above modules should be imported first, and string is a special case calendar, time, datetime refer to Chinese meaning calendar Calendar related modules Import before use import calen ...

I want to learn about crawlers recently, but I can't understand Python, so I can only learn the script language from the syntax. In my understanding, Python means the serpent, which can be seen from its icon that the two snakes are intertwined with each other.                        The purpose o ...

When we deploy something in an environment without public network, it is often a headache, because we may need a variety of dependency packages, which also have many dependencies. If we don't package and download all the dependency packages at one time, we can understand what Russian dolls are in the process of downloading.. 1, os dependency pa ...

By Facebook research Compile Flin Source: Github Benchmarking Here, we benchmark the training speed of Mask R-CNN in detectron 2 based on some other popular open source implementations of Mask R-CNN. set up Hardware: 8 NVIDIA V100 with NVLink. Software: Python 3.7, CUDA 10.0, cuDNN 7.6.4, PyTorch 1.3.0 (link( https://download.pytorch.org/ ...

pydbclib It is a general python relational database operation toolkit. It uses a unified interface to operate various relational databases (such as oracle, mysql, postgres, hive, impala, etc.) for addition, deletion, and query. It is a connection driver package for various python databases (such as sqlalchemy, pymysql, CX_ The encapsulation of ...

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16. Generator-Iterator _Iterable objects are called iterative objects, and iterator and generator functions are iterative objects. Protocols and methods for defining iterators and generators are provided in Python. 16.1 Iterative and Iterable Objects 16.1.1 Iterable Objects, Iterators, and Iterable Protocols 1. Iterable Objects _In Python, _u i ...

by Aurora Today, I'd like to introduce the model part of Django framework. The model is a simple and clear description of real data. It contains the necessary fields and behaviors for stored data. Django follows the DRY Principle. Its goal is that you only need to define the data model, and then you don't need to care about other miscellaneous ...

catalog Choose the appropriate flow operation mode Be careful to execute immediately Will LINQ to Objects degrade code performance Different methods What has been learned The cost of using LINQ to Objects Performance and simplicity: can't fish and bear paw have both LINQ's advantage is not to provide any new functions, but to enable us t ...